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Document And Entity Information - USD ($) $ in Millions	12 Months Ended
Document And Entity Information - USD ($) $ in Millions	Mar. 31, 2020	May 29, 2020	Sep. 30, 2019
Document Information [Line Items]
Entity Registrant Name	AMERICAN SUPERCONDUCTOR CORP /DE/
Entity Central Index Key	0000880807
Trading Symbol	amsc
Current Fiscal Year End Date	--03-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		22,636,686
Entity Public Float			$ 163.9
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, par value $0.01 per share

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 24,699	$ 77,483
Marketable securities	30,149
Accounts receivable	16,987	7,855
Inventory	18,975	12,119
Notes receivable, current portion		2,888
Prepaid expenses and other current assets	2,959	3,053
Restricted cash	508
Total current assets	94,277	103,398
Marketable securities, long term portion	5,046
Property, plant and equipment, net	8,565	8,972
Intangibles, net	3,550	2,890
Right of use asset	3,359
Goodwill	1,719	1,719
Restricted cash	5,657	715
Deferred tax assets	1,551	1,357
Other assets	385	279
Total assets	124,109	119,330
Current liabilities:
Accounts payable and accrued expenses	22,091	15,885
Operating lease liabilities – ST	439
Derivative liabilities		4,942
Deferred revenue, current portion	18,430	7,557
Total current liabilities	40,960	28,384
Deferred revenue, long term portion	7,712	7,962
Operating lease liabilities – LT	3,000
Deferred tax liabilities	180	1,698
Other liabilities	38	93
Total liabilities	51,890	38,137
Commitments and contingencies (Note 16)
Stockholders' equity:
Common stock, $0.01 par value, 75,000,000 shares authorized; 22,902,288 and 21,651,631 shares issued and 22,604,410 and 21,413,113 shares outstanding at March 31, 2020 and 2019, respectively	229	216
Additional paid-in capital	1,053,507	1,044,622
Treasury stock, at cost, 297,878 and 235,518 shares at March 31, 2020 and 2019, respectively	(2,666)	(2,101)
Accumulated other comprehensive loss	(216)	(5)
Accumulated deficit	(978,635)	(961,539)
Total stockholders' equity	72,219	81,193
Total liabilities and stockholders' equity	$ 124,109	$ 119,330

Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2020	Mar. 31, 2019
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	22,902,288	21,651,631
Common stock, shares outstanding (in shares)	22,604,410	21,413,113
Treasury stock, shares (in shares)	297,878	235,518

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 63,838	$ 56,207
Cost of revenues	54,393	42,190
Gross profit	9,445	14,017
Operating expenses:
Research and development	9,565	9,874
Selling, general and administrative	22,669	22,028
Gain on Sinovel settlement		(52,698)
Amortization of acquisition related intangibles	340	340
Restructuring		450
Total operating expenses (income)	32,574	(20,006)
Operating (loss) income	(23,129)	34,023
Change in fair value of derivatives and warrants	4,648	(3,725)
Gain on sale of minority interests		127
Interest income (expense), net	1,327	1,117
Other income (expense), net	253	1,599
(Loss) income before income tax expense	(16,901)	33,141
Income tax expense	195	6,380
Net (loss) income	$ (17,096)	$ 26,761
Net (loss) income per common share
Basic (in dollars per share)	$ (0.81)	$ 1.32
Diluted (in dollars per share)	$ (1.03)	$ 1.29
Weighted average number of common shares outstanding
Basic (in shares)	20,985	20,335
Diluted (in shares)	21,069	20,726

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net (loss) income	$ (17,096)	$ 26,761
Other comprehensive loss, net of tax:
Foreign currency translation losses	(211)	(888)
Total other comprehensive loss, net of tax	(211)	(888)
Comprehensive (loss) income	$ (17,307)	$ 25,873

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 31, 2018	21,139,000
Balance at Mar. 31, 2018	$ 211	$ 1,041,113	$ (1,645)	$ 883	$ (988,333)	$ 52,229
Issuance of common stock - ESPP (in shares)	20,000
Issuance of common stock - ESPP		157				157
Issuance of common stock - restricted shares (in shares)	451,000
Issuance of common stock - restricted shares	$ 4	(4)
Stock-based compensation expense		3,030				3,030
Issuance of stock for 401(k) match (in shares)	42,000
Issuance of stock for 401(k) match	$ 1	326				327
Repurchase of treasury stock			(456)			(456)
Cumulative translation adjustment				(888)		(888)
Cumulative impact of adoption of ASU No. 2014-09					33	33
Net (loss) income					26,761	$ 26,761
Balance (in shares) at Mar. 31, 2019	21,652,000					21,413,113
Balance at Mar. 31, 2019	$ 216	1,044,622	(2,101)	(5)	(961,539)	$ 81,193
Issuance of common stock - ESPP (in shares)	37,000
Issuance of common stock - ESPP		201				201
Issuance of common stock - restricted shares (in shares)	360,000
Issuance of common stock - restricted shares	$ 4	(4)
Stock-based compensation expense		1,922				1,922
Issuance of stock for 401(k) match (in shares)	44,000
Issuance of stock for 401(k) match	$ 1	341				342
Repurchase of treasury stock			(565)			(565)
Cumulative translation adjustment				(211)		(211)
Net (loss) income					(17,096)	(17,096)
Issuance of common stock-warrant exercise (in shares)	809,000
Issuance of common stock-warrant exercise	$ 8	6,425				$ 6,433
Balance (in shares) at Mar. 31, 2020	22,902,000					22,604,410
Balance at Mar. 31, 2020	$ 229	$ 1,053,507	$ (2,666)	$ (216)	$ (978,635)	$ 72,219

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (17,096)	$ 26,761
Adjustments to reconcile net (loss) income to net cash (used in) provided by operations:
Depreciation and amortization	4,308	4,609
Stock-based compensation expense	1,922	3,030
Provision for excess and obsolete inventory	1,276	878
Gain on sale from minority interest investments		(127)
Deferred income taxes	(1,714)	735
Change in fair value of warrants	(4,648)	3,725
Non-cash interest income	(308)	(224)
Other non-cash items	329	(852)
Unrealized foreign exchange gain on cash and cash equivalents	(319)
Changes in operating asset and liability accounts:
Accounts receivable	(9,159)	(529)
Inventory	(8,143)	5,007
Prepaid expenses and other current assets	373	(365)
Accounts payable and accrued expenses	5,894	2,839
Deferred revenue	10,788	(2,773)
Net cash (used in) provided by operating activities	(16,497)	42,714
Cash flows from investing activities:
Purchase of property, plant and equipment	(3,630)	(952)
Proceeds from the sale of property, plant and equipment	3,001	3,138
Purchase of marketable securities	(35,000)
Purchase of intangible assets	(1,000)
Proceeds from sale of minority interests		127
Change in other assets	8	(144)
Net cash (used in) provided by investing activities	(36,621)	2,169
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(565)	(456)
Proceeds from exercise of warrants	6,139
Proceeds from exercise of employee stock options and ESPP	202	157
Net cash provided by (used in) financing activities	5,776	(299)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	8	(635)
Net (decrease) increase in cash, cash equivalents and restricted cash	(47,334)	43,949
Cash, cash equivalents and restricted cash at beginning of year	78,198	34,249
Cash, cash equivalents and restricted cash at end of year	30,864	78,198
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	3,653	2,859
Issuance of common stock to settle liabilities	407	457
Hercules [Member]
Supplemental schedule of cash flow information:
Issuance of common stock to Hercules to settle warrant liability	$ 294

Note 1 - Nature of the Business and Operations and Liquidity	12 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Nature of the Business and Operations and Liquidity Nature of the Business and Operations American Superconductor Corporation (together with its subsidiaries, “AMSC®” or the “Company”) was founded on April 9, 1987. The Company is a leading system provider of megawatt-scale power solutions that enhance the performance of the power grid, protect the Navy’s fleet, and lower the cost of wind power. The Company’s products leverage its proprietary “smart materials” and “smart software and controls” to provide enhanced resiliency and improved performance of megawatt-scale power flow. The Company’s consolidated financial statements have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form 10 -K. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. Liquidity The Company has historically experienced recurring operating losses and as of March 31, 2020 , the Company had an accumulated deficit of $ 978.6 million. In addition, the Company has historically experienced recurring negative operating cash flows. At March 31, 2020 , the Company had cash, cash equivalents, and marketable securities of $ 59.9 million. Marketable securities include certificate of deposits with maturities between eleven and eighteen months. Cash used in operations for the year ended March 31, 2020 was $ 16.5 million. On July 3, 2018, the Company and its wholly-owned subsidiaries Suzhou AMSC Superconductor Co. Ltd. (“AMSC China”) and AMSC Austria GMBH (“AMSC Austria”) entered into a settlement agreement (the “Settlement Agreement”) with Sinovel Wind Group Co., Ltd. (“Sinovel”). The Settlement Agreement settled the litigation and arbitration proceedings between the Company and Sinovel. Under the terms of the Settlement Agreement, Sinovel agreed to pay AMSC China an aggregate cash amount in Renminbi (“RMB”) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of the RMB equivalent of $32.5 million on July 4, 2018, which was repatriated to the U.S. entity during the nine months ended December 31, 2018, and paid the second installment of the RMB equivalent of $25.0 million on December 27, 2018. The Company's fiscal 2018 results include the net gain received from the settlement with Sinovel of $52.7 million. On February 1, 2018, ASC Devens LLC (the “Seller”), a wholly-owned subsidiary of the Company, entered into a Purchase and Sale Agreement (the “PSA”) with 64 Jackson, LLC (the “Purchaser”) and Stewart Title Guaranty Company (“Escrow Agent”), to effectuate the sale of certain real property located at 64 Jackson Road, Devens, Massachusetts, including the building that had served as the Company’s headquarters (collectively, the “Property”), in exchange for total consideration of $23.0 million, composed of (i) cash consideration of $17.0 million, and (ii) a $6.0 million subordinated secured commercial promissory note payable to the Company (the “Seller Note”). Subsequently, the Seller, the Purchaser and Jackson 64 MGI, LLC (“Assignee”) entered into an Assignment of Purchase and Sale Agreement (the “Assignment Agreement”), pursuant to which the Purchaser assigned all of its rights and interests in the PSA to the Assignee and the Assignee agreed to assume all of the Purchaser’s obligations and liabilities under the PSA. The transaction closed on March 28, 2018, at which time the Company received, from the Assignee, cash consideration, net of certain agreed upon closing costs, of $16.9 million, and the Seller Note at an interest rate of 1.96%. The Seller Note is secured by a subordinated second mortgage on the Property and a subordinated second assignment of leases and rents. The Company received the first $3.0 million payment due pursuant to the Seller Note on March 28, 2019 and the second $3.0 million payment plus interest on May 23, 2019. In December 2015, the Company entered into a set of strategic agreements valued at approximately $210.0 million with Inox Wind Ltd. (“Inox” or “Inox Wind”), which includes a multi-year supply contract pursuant to which the Company will supply electrical control systems to Inox and a license agreement allowing Inox to manufacture a limited number of electrical control systems. After Inox purchases the specified number of electrical control systems required under the terms of the supply contract, Inox agreed that the Company will continue as Inox’s preferred supplier and Inox will be required to purchase from the Company a majority of its electrical control systems requirements for an additional three -year period. Pursuant to these strategic agreements, Inox must forecast future purchase orders of sets of Electrical Control Systems ("ECS") which become firm orders three months prior to shipment, and Inox must post letters of credit before the Company will ship such orders. Inox is currently delinquent on its obligation to post letters of credit for sets of ECS that Inox forecasted to purchase under the terms of the supply contract. On May 29, 2020, the Company sent written notice to Inox notifying Inox of its default under the supply contract due to Inox’s failure to post letters of credit in the amount of €6.0 million for the payment of ECS that Inox is obligated to purchase under the terms of the supply contract. If Inox fails to post letters of credit in the amount of €6.0 million in accordance with the terms of the supply contract within the ninety day cure period after receipt of the default notice, then the Company may terminate the supply contract by providing written notice of such termination to Inox. We cannot predict if and when Inox will post letters of credit consistent with the forecasted ECS quantities. Inox’s failure to post letters of credit and take delivery of forecasted ECS quantities would impact the Company’s revenues and liquidity. In the event the Company were to terminate the supply contract, the Company's revenues and liquidity would be impacted. The Company issued warrants in conjunction with an equity offering to Hudson Bay Capital ("Hudson") in November 2014 ( the "Hudson Warrant"). The Hudson Warrant was partially exercised on November 13, 2019 with an exercise price of $7.81. The Company received $6.1 million in cash for the exercise of 786,000 warrants. The remaining 32,181 warrants expired unexercised on November 13, 2019. In March 2020, the World Health Organization declared the disease caused by the novel coronavirus (“COVID- 19“ ) to be a pandemic. COVID- 19 has spread throughout the globe, including in the Commonwealth of Massachusetts where the Company’s headquarters are located, and in other areas where the Company has business operations. In response to the outbreak, the Company has followed the guidelines of the U.S. Centers for Disease Control and Prevention (“CDC”) and applicable state government authorities to protect the health and safety of the Company’s employees, families, suppliers, customers and communities. While these existing measures and, COVID- 19 generally, have not materially disrupted the Company’s business to date, any future actions necessitated by the COVID- 19 pandemic may result in disruption to the Company’s business. While the COVID- 19 pandemic continues to rapidly evolve, the Company continues to assess the impact of the COVID- 19 pandemic to best mitigate risk and continue the operations of the Company’s business. The extent to which the outbreak impacts the Company’s business, liquidity, results of operations and financial condition will depend on future developments, which are highly uncertain and cannot be predicted with confidence, including new information that may emerge concerning the severity of the COVID- 19 pandemic and the actions to contain it or treat its impact, among others. If the Company, its customers or suppliers experience prolonged shutdowns or other business disruptions, the Company’s business, liquidity, results of operations and financial condition are likely to be materially adversely affected, and the Company’s ability to access the capital markets may be limited. The Company believes that based on the information presented above and its annual management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next twelve months following the issuance of the financial statements for the year ended March 31, 2020 . The Company’s liquidity is highly dependent on its ability to increase revenues, including its ability to collect revenues under its agreements with Inox, its ability to control its operating costs, and its ability to raise additional capital, if necessary. The impact of the COVID- 19 pandemic on the global financing markets may reduce the Company's ability to raise additional capital, if necessary, which could negatively impact the Company's liquidity. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

Note 2 - Summary of Significant Accounting Policies

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

Basis of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions are eliminated. Certain reclassifications of prior years’ amounts have been made to conform to the current year presentation. These reclassifications had

effect on net income, cash flows from operating activities or stockholders’ equity.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The Company bases its estimates on historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are

not

readily apparent from other sources. On an ongoing basis, the Company evaluates its estimates, including those related to revenue recognition, collectability of receivables, realizability of inventory, goodwill and intangible assets, warranty provisions, stock-based compensation, tax reserves, and deferred tax assets. Provisions for depreciation are based on their estimated useful lives using the straight-line method. Some of these estimates can be subjective and complex and, consequently, actual results

may

differ from these estimates under different assumptions or conditions. While for any given estimate or assumption made by the Company’s management there

may

be other estimates or assumptions that are reasonable, the Company believes that, given the current facts and circumstances, it is unlikely that applying any such other reasonable estimate or assumption would materially impact the financial statements.

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of

three

months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level

of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Marketable Securities

Marketable securities consist of certificates of deposit with maturities of greater than

months that are measured using such inputs as quoted prices and are classified within Level

of the valuation hierarchy. The Company determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such classification as of each balance sheet date. All marketable securities are considered available for sale and are carried at fair value. Changes in fair value are recorded to other income (expense), net. The Company periodically reviews the realizability of each short and long term marketable security when impairment indicators exist with respect to the security. If other than temporary impairment of value of the security exists, the carrying value of the security is written down to its estimated fair value.

Accounts Receivable

Accounts receivable consist of amounts owed by commercial companies and government agencies. Accounts receivable are stated net of allowances for doubtful accounts. The Company’s accounts receivable relate principally to a limited number of customers. As of

March 31, 2020

Fuji Bridex Pte. Ltd. accounted for approximately

25%,

Department of Homeland Security accounted for

18%,

and Doosan Heavy Industries & Construction Co., Ltd. accounted for approximately

17%

of the Company's total receivable balance, with

other customer accounting for greater than

10%

of the balance. As of

March 31, 2019

, Vestas accounted for approximately

21%

and RES System

LLC accounted for approximately

16%

of the Company’s total receivable balance, with

other customer accounting for greater than

10%

of the balance. Changes in the financial condition or operations of the Company’s customers

may

result in delayed payments or non-payments which would adversely impact its cash flows from operating activities and/or its results of operations. As such, the Company

may

require collateral, advanced payment or other security based upon the customer history and/or creditworthiness. In determining the allowance for doubtful accounts, the Company evaluates the collectability of accounts receivable based primarily on the probability of recoverability based on historical collection and write-off experience, the age of past due receivables, specific customer circumstances, and current economic trends. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payment, additional allowances

may

be required. Failure to accurately estimate the losses for doubtful accounts and ensure that payments are received on a timely basis could have a material adverse effect on the Company’s business, financial condition, results of operations, and cash flows.

Inventory

Inventories include material, direct labor and related manufacturing overhead, and are stated at the lower of cost, determined on a

first

-in,

first

-out basis, or net realizable value determined on a

first

-in,

first

-out basis as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The Company records inventory when it takes delivery and title to the product according to the terms of each supply contract.

Program costs

may

be deferred and recorded as inventory on contracts on which costs are incurred in excess of approved contractual amounts and/or funding, if future recovery of the costs is deemed probable.

At each balance sheet date, the Company evaluates its ending inventories for excess quantities and obsolescence. Inventories that management considers excess or obsolete are reserved. Management considers forecasted demand in relation to the inventory on hand, competitiveness of product offerings, market conditions and product life cycles when determining excess and obsolescence and net realizable value adjustments. Once inventory is written down and a new cost basis is established, it is

not

written back up if demand increases.

For the fiscal years ended

March 31, 2020

and

2019

, the Company recorded inventory reserves of approximately $

1.3

million and

$0.9

million, respectively, based on evaluating its ending inventory on hand for excess quantities and obsolescence.

Leases

Leases include all agreements in which we obtain control of a physical asset. Leases are captured on the balance sheet as both a right of use asset and associated lease liability and are valued based on the commencement of our control of the asset, after being discounted by our incremental borrowing rate. Our lease portfolio is made up primarily of real estate leases for our various offices, but also include items such as vehicles, IT equipment and other miscellaneous tools and equipment needed for manufacturing. Our incremental borrowing rate was determined through an analysis to identify what rates we could obtain if we were to secure external financing for similar transactions, and includes considerations of both the market and our current credit ratings. An analysis is performed annually, or upon execution of any individually material agreement, to ensure that the rates being applied to newly acquired leases are still accurate.

The majority of the Company's leases are classified as operating leases, and therefore the expense is captured in income from operations each period.

We have elected to exclude all leases of less than

twelve

months from the balance sheet presentation. We have also elected a policy in which we will

not

segregate lease components from non-lease components, so in the event we execute an agreement which includes a non-lease component our asset and liability recorded to the balance sheet will include the value of that non-lease component as well. This policy will be applied to all classifications of leases.

Property, Plant and Equipment

Property, plant and equipment are carried at cost less accumulated depreciation and amortization. The Company accounts for depreciation and amortization using the straight-line method to allocate the cost of property, plant and equipment over their estimated useful lives as follows:

Asset Classification		Estimated Useful Life in Years
Machinery and equipment		3-10
Furniture and fixtures		3-5
Leasehold improvements		Shorter of the estimated useful life or the remaining lease term

Expenditures for maintenance and repairs are expensed as incurred. Upon retirement or other disposition of assets, the costs and related accumulated depreciation are eliminated from the accounts and the resulting gain or loss is reflected in operating expenses.

Valuation of Long-Lived Assets

The Company periodically evaluates its long-lived assets, consisting principally of fixed assets and amortizable intangible assets, for potential impairment. In accordance with the applicable accounting guidance for the treatment of long-lived assets, the Company reviews the carrying value of its long-lived assets or asset group that is held and used, including intangible assets subject to amortization, for impairment whenever events and circumstances indicate that the carrying value of the assets

may

not

be recoverable. Under the held and used approach, the asset or asset group to be tested for impairment should represent the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. The Company evaluates its long-lived assets whenever events or circumstances suggest that the carrying amount of an asset or group of assets

may

not

be recoverable from the estimated undiscounted future cash flows.

There were

indicators requiring impairment testing on the Company's long-lived assets during the fiscal years ended

March 31, 2020

and

2019

Goodwill

Goodwill represents the excess of cost over net assets of acquired businesses that are consolidated. The Company performs its annual assessment of goodwill on

February

28th

of each fiscal year and whenever events or changes in circumstances or a triggering event indicate that the carrying amount

may

not

be recoverable. Determining whether a triggering event has occurred often involves significant judgment from management. An entity is permitted to

first

assess qualitatively whether it is necessary to perform a goodwill impairment test. The quantitative impairment test is required only if the entity concludes that it is more likely than

not

that a reporting unit’s fair value is less than its carrying amount. The Company determines the fair value of a reporting unit based on an income approach utilizing a discounted cash flow adjusted for entity specific factors. In evaluating whether it is more likely than

not

that the fair value of a reporting unit is less than its carrying amount, an entity should consider the totality of all relevant events or circumstances that affect the fair value or carrying amount of a reporting unit. If the carrying value of a reporting unit exceeds the reporting unit’s fair value, then an impairment charge is recognized reducing the goodwill by the excess of the carrying amount over the fair value,

not

to exceed the total amount of the goodwill allocated to the that reporting unit. See Note

"Acquisition and Related Goodwill" for further information and discussion.

The Company performed its annual assessment of goodwill on

February 28, 2020

and noted

triggering events from the analysis date to

March 31, 2020

and determined that there was

impairment to goodwill. Additionally, there was

impairment identified for the fiscal year ended

March 31, 2019

based on the assessment performed in the prior fiscal year.

Revenue Recognition

Revenue contracts are defined as an arrangement that creates enforceable rights and obligations of both parties where collection of the contract price is deemed probable.

The Company records revenue based on a

five

-step model which includes confirmation of contract existence, identifying the performance obligations, determining the transaction price, allocating the contract transaction price to the performance obligations, and recognizing the revenue when (or as) control of goods or services is transferred to the customer. The transfer of control

can occur at the time of delivery, installation or post-installation where applicable.

The Company's equipment and system product line includes certain contracts which do

not

meet the requirements of an exchange transaction and therefore do

not

fall within the scope of ASC

606.

As these non-exchange transaction contracts are considered grant revenue and do

not

fall within any specific accounting literature, the Company follows guidance within ASC

606

by analogy to recognize grant revenue over time.

For certain arrangements, such as contracts to perform research and development, prototype development contracts and certain customized product sales, the Company records revenues using the over-time method, measured by the relationship of costs incurred to total estimated contract costs. Over-time revenue recognition accounting is predominantly used on certain turnkey power systems installations for electric utilities and long-term prototype development contracts with the U.S. government. The Company follows this method when any of the

three

following criteria are met: when the customer receives the benefits as they are performed, control transfers to the customer as the work is performed, or there is

alternative use to the Company and there is an enforceable right to payment through the life of the contract. However, the ability to reliably estimate total costs at completion is challenging, especially on long-term prototype development contracts, and could result in future changes in contract estimates. For contracts where reasonably dependable estimates of the revenues and costs cannot be made, the Company follows the point in time method.

The Company enters into sales arrangements that

may

provide for multiple performance obligations to a customer. Sales of certain products

may

include extended warranty and support or service packages, and at times include performance bonds. As these contracts progress, the Company continually assesses the probability of a payout from the performance bond. Should the Company determine that such a payout is likely; the Company would record a liability. The Company would reduce revenue to the extent a liability is recorded. In addition, the Company enters into licensing arrangements that include training services.

Performance obligations are separated into more than

one

unit of accounting when (

) the delivered element(s) have value to the customer on a stand-alone basis, and (

) the Company's promise to transfer the goods or services to the customer is separately identifiable from other promises in the contract. In general, revenues are separated between the different product shipments which have stand-alone value, and the various services to be provided. Revenue for product shipments is generally recognized at a point in time where control of the product is transferred to the customer, while revenues for the services are generally recognized over the period of performance. The Company identifies all goods and/or services that are to be delivered separately under a sales arrangement and

allocates the transaction price to each distinct performance obligation using the respective standalone selling price ("SSP") which is determined primarily using the cost plus expected margin approach for products and a relief from royalty method for licenses. Revenue allocated to each performance obligation is recognized when, or as, the performance obligation is satisfied.

The Company reviews SSP and the related margins at least annually.

The Company’s license agreements provide either for the payment of contractually determined paid-up front license fees or milestone based payments in consideration for the grant of rights to manufacture and or sell products using its patented technologies or know-how. Some of these agreements provide for the release of the licensee from past and future intellectual property infringement claims. When the Company can determine that it has

further obligations other than the grant of the license and that the Company has fully transferred the technology know-how, the Company recognizes the revenue under a point in time model. In other license arrangements, the Company

may

also agree to provide training services to transfer the technology know-how. In these arrangements, the Company has determined that the licenses have

standalone value to the customer and are

not

separable from training services as the Company can only fully transfer the technology know-how through the training component. Accordingly, the Company accounts for these arrangements as a single unit of accounting, and recognizes revenue over the period of its performance using the over-time method. Costs for these arrangements are expensed as incurred.

Existing customers are subject to ongoing credit evaluations based on payment history and other factors. If it is determined that collectability of any portion of the contract value is

not

probable, an analysis of variable consideration will be performed using either the most likely amount or expected value method to determine the amount of revenue that must be constrained until the scenario causing the variability has been resolved. For contractual arrangements that involve variable consideration, the Company recognizes revenue for these amounts upon reaching the constraining event successfully. The Company does

not

generally provide for extended payment terms or provide its customers with a right of return.

The Company has elected to record taxes collected from customers on a net basis and does

not

include tax amounts in revenue or costs of revenue.

The Company’s contract assets and liabilities primarily relate to the timing differences between cash received from a customer in connection with contractual rights to invoicing and the timing of revenue recognition following completion of performance obligations. The Company's accounts receivable balance is made up entirely of customer contract related balances.

See Note

“Revenue Recognition,” for further information regarding the Company’s adoption of Accounting Standards Codification (“ASC”)

606,

Revenue from Contracts with Customers

Product Warranty

Warranty obligations are incurred in connection with the sale of the Company’s products. The Company provides assurance-type warranties on all product sales for a term of typically

one

three

years, and extended service-type warranties at the customers’ option for an additional term ranging up to

four

additional years. The Company accrues for the estimated warranty costs for assurance warranties at the time of sale based on historical warranty experience plus any known or expected changes in warranty exposure. For all extended service-type warranties, the Company recognizes the revenue ratably over time during the effective period of the service. The costs incurred to provide for these warranty obligations are estimated and recorded as an accrued liability at the time of sale. Future warranty costs are estimated based on historical performance rates and related costs to repair given products. The accounting estimate related to product warranty involves judgment in determining future estimated warranty costs. Should actual performance rates or repair costs differ from estimates, revision to the estimated warranty liability would be required.

Research and Development Costs

Research and development costs are expensed as incurred.

Income Taxes

The Company’s provision for income taxes is comprised of a current and a deferred portion. The current income tax provision is calculated as the estimated taxes payable or refundable on tax returns for the current year. The deferred income tax provision is calculated for the estimated future tax effects attributable to temporary differences and carry-forwards using expected tax rates in effect in the years during which the differences are expected to reverse.

Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount expected to be realized. The Company has provided a valuation allowance against its U.S. and China deferred income tax assets since the Company believes that it is more likely than

not

that these deferred tax assets are

not

currently realizable due to uncertainty around profitability in the future.

Accounting for income taxes requires a

two

-step approach to recognizing and measuring uncertain tax positions. The

first

step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than

not

that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The

second

step is to measure the tax benefit as the largest amount that is more than

50%

likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but

not

limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity. Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. The Company includes interest and penalties related to gross unrecognized tax benefits within the provision for income taxes. See Note

13,

“Income Taxes,” for further information regarding its income tax assumptions and expenses.

Stock-Based Compensation

The Company accounts for stock-based payment transactions using a fair value-based method and recognizes the related expense in the results of operations.

Stock-based compensation is estimated at the grant date based on the fair value of the award and is recognized as expense over the requisite service period of the award. The fair value of restricted stock awards is determined by reference to the fair market value of the Company’s common stock on the date of grant. The Company uses the Black-Scholes option pricing model to estimate the fair value of awards with service and performance conditions. For awards with service conditions only, the Company recognizes compensation cost on a straight-line basis over the requisite service/vesting period. For awards with performance conditions, accruals of compensation cost are made based on the probable outcome of the performance conditions. The cumulative effect of changes in the probability outcomes are recorded in the period in which the changes occur.

Determining the appropriate fair value model and related assumptions requires judgment, including estimating stock price volatilities of the Company’s common stock and expected terms. The expected volatility rates are estimated based on historical and implied volatilities of the Company’s common stock. The expected term represents the average time that the options that vest are expected to be outstanding based on the vesting provisions and the Company’s historical exercise, cancellation and expiration patterns.

The Company estimates pre-vesting forfeitures when recognizing compensation expense based on historical and forward-looking factors. Changes in estimated forfeiture rates and differences between estimated forfeiture rates and actual experience

may

result in significant, unanticipated increases or decreases in stock-based compensation expense from period to period. The termination of employment of certain employees who hold large numbers of stock-based awards

may

also have a significant, unanticipated impact on forfeiture experience and, therefore, on stock-based compensation expense. The Company will update these assumptions on at least an annual basis and on an interim basis if significant changes to the assumptions are warranted.

The Company accounts

for share-based payments made to non-employees

in the same manner as other share-based payments for employees, with the measurement being based on the fair value at the grant date. The non-employee share based payments will be included within the Company's stock compensation currently reported.

Computation of Net Income (Loss) per Common Share

Basic net income (loss) per share (“EPS”) is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed by dividing the net loss by the weighted-average number of common shares and dilutive common equivalent shares outstanding during the period, calculated using the treasury stock method. Common equivalent shares include the effect of restricted stock, exercise of stock options and warrants and contingently issuable shares. For the fiscal years ended

March 31, 2020

and

2019

, common equivalent shares of

354,748,

and

907,988,

respectively, were

not

included in the calculation of diluted EPS as they were considered antidilutive. The following table

reconciles

the numerators and denominators of the EPS calculation for the fiscal years ended

March 31, 2020

and

2019

(in thousands except per share amounts):

	Fiscal year ended March 31,
	2020			2019
Numerator:
Net income (loss)	$	(17,096	)	$	26,761
Less: decrease in fair value of warrants, net of income tax		(4,648	)		—
Plus: change in fair value due to exercise of warrants		83			—
Net income (loss) - diluted	$	(21,662	)	$	26,761
Denominator:
Weighted-average shares of common stock outstanding		21,937			21,265
Weighted-average shares subject to repurchase		(953	)		(930	)
Shares used in per-share calculation ― basic		20,985			20,335
Common stock awards		—			391
Common stock warrants		84			—
Shares used in per-share calculation ― diluted		21,069			20,726
Net income (loss) per share ― basic	$	(0.81	)	$	1.32
Net income (loss) per share ― diluted	$	(1.03	)	$	1.29

Foreign Currency Translation

The functional currency of all the Company’s foreign subsidiaries is the U.S. dollar, except for AMSC Austria, for which the local currency (Euro) is the functional currency, and AMSC China, for which the local currency (Renminbi) is the functional currency. The assets and liabilities of AMSC Austria and AMSC China are translated into U.S. dollars at the exchange rate in effect at the balance sheet date and income and expense items are translated at average rates for the period. Cumulative translation adjustments are excluded from net loss (income) and shown as a separate component of stockholders’ equity. Net foreign currency gains and losses are included in other income (expense), net on the consolidated statements of operations and were $

0.1

million and

$1.6

million, for the fiscal years ended

March 31, 2020

and

2019

, respectively. The Company has

restrictions on the foreign exchange activities of its foreign subsidiaries, including the payment of dividends and other distributions.

Risks and Uncertainties

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates and would impact future results of operations and cash flows.

The Company invests its available cash in high credit, quality financial instruments and invests primarily in investment-grade marketable securities, including, but

not

limited to, government obligations, money market funds and corporate debt instruments.

Several of the Company’s government contracts are being funded incrementally, and as such, are subject to the future authorization, appropriation, and availability of government funding. The Company has a history of successfully obtaining financing under incrementally-funded contracts with the U.S. government and it expects to continue to obtain additional contract modifications in the year ending

March

31,

2021

and beyond as incremental funding is authorized and appropriated by the government.

Contingencies

From time to time, the Company

may

be involved in legal and administrative proceedings and claims of various types. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. Management reviews these estimates in each accounting period as additional information is known and adjusts the loss provision when appropriate. If the loss is

not

probable or cannot be reasonably estimated, a liability is

not

recorded in the consolidated financial statements. If, with respect to a matter, it is

not

both probable to result in liability and the amount of loss cannot be reasonably estimated, an estimate of possible loss or range of loss is disclosed unless such an estimate cannot be made. The Company does

not

recognize gain contingencies until they are realized. Legal costs incurred in connection with loss contingencies are expensed as incurred. See Note

16,

“Commitments and Contingencies,” for further information.

Disclosure of Fair Value of Financial Instruments

The Company’s financial instruments consist principally of cash and cash equivalents, accounts receivable, marketable securities, accounts payable, accrued expenses, warrants to purchase shares of common stock, and derivatives. The carrying amounts of cash and cash equivalents, accounts receivable, short-term debt, accounts payable, and accrued expenses due to their short nature approximate fair value at

March 31, 2020

and

2019

. The estimated fair values have been determined through information obtained from market sources and management estimates. Marketable securities consist of certificates of deposit with maturities of greater than

months that are measured using such inputs as quoted prices and are classified within Level

of the valuation hierarchy. The Company determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such classification as of each balance sheet date. All marketable securities are considered available for sale and are carried at fair value. Changes in fair value are recorded to other income (expense), net. The fair value for the warrant arrangements was historically estimated by management based on various assumptions in a lattice model and was subject to revaluation at each balance sheet date. The Company classifies the estimates used to fair value these instruments as Level

inputs. See Note

“Fair Value Measurements” for a full discussion on fair value measurements.

Note 3 - Revenue Recognition

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

Revenue Recognition

The Company’s revenues in its Grid segment are derived primarily through enabling the transmission and distribution of power, providing planning services that allow it to identify power grid needs and risks, and developing ship protection systems for the U.S. Navy. The Company’s revenues in its Wind segment are derived primarily through supplying advanced power electronics and control systems, licensing its highly engineered wind turbine designs, and providing extensive customer support services to wind turbine manufacturers. The Company records revenue based on a

five

-step model in accordance with ASC

606.

For its customer contracts, the Company identifies the performance obligations, determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) control of goods or services is transferred to the customer. As of

March 31, 2020

% of revenue was recognized at the point in time when control transferred to the customer, with the remainder being recognized over time.

In the Company's equipment and system product line, each contract with a customer summarizes each product sold to a customer, which typically represents distinct performance obligations. A contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company’s product sales transfer control to the customer in line with the contracted delivery terms and revenue is recorded at the point in time when title and risk transfer to the customer, as the Company has determined that this is the point in time that control transfers to the customer.

The Company's equipment and system product line includes certain contracts which do

not

meet the requirements of an exchange transaction and therefore do

not

fall within the scope of ASC

606.

As these non-exchange transaction contracts are considered grant revenue and do

not

fall within any specific accounting literature, the Company follows guidance within ASC

606

by analogy to recognize grant revenue over time. In the year ended

March 31, 2020

, the Company recorded $

6.4

million in grant revenue, which is included in the Company’s Grid revenue. There was

grant revenue in the year ended

March 31, 2019

In the Company's service and technology development product line, there are several different types of transactions and each begins with a contract with a customer that summarizes each product sold to a customer, which typically represents distinct performance obligations. The technology development transactions are primarily for activities that have

alternative use and for which a profit can be expected throughout the life of the contract. In these cases, the revenue is recognized over time, but in the instances where the profit cannot be assured throughout the entire contract then the revenue is recognized at a point in time. Each contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach. The ongoing service transactions are for service contracts that provide benefit to the customer simultaneously as the Company performs its obligations, and therefore this revenue is recognized ratably over time throughout the effective period of these contracts. The transaction prices on these contracts are allocated based on an adjusted market approach which is re-assessed annually for reasonableness. The field service transactions include contracts for delivery of goods and completion of services made at the customer's requests, which are

not

deemed satisfied until the work has been completed and/or the requested goods have been delivered, so all of this revenue is recognized at the point in time when the control changes, and at allocated prices based on the adjusted market approach driven by standard price lists. The royalty transactions are related to certain contract terms on transactions in the Company's equipment and systems product line based on activity as specified in the contracts. The transaction prices of these agreements are calculated based on an adjusted market approach as specified in the contract. The Company reports royalty revenue for usage-based royalties when the sales have occurred. In circumstances when collectability is

not

assured and a contract does

not

exist under ASC

606,

revenue is deferred until a non-refundable payment has been received for substantially all the amount that is due and there are

further remaining performance obligations.

The Company's service contracts can include a purchase order from a customer for specific goods in which each item is a distinct performance obligation satisfied at a point in time at which control of the goods is transferred to the customer which occurs based on the contracted delivery terms or when the requested service work has been completed. The transaction price for these goods is allocated based on the adjusted market approach considering similar transactions under similar circumstances. Service contracts are also derived from ongoing maintenance contracts and extended service-type warranty contracts. In these transactions, the Company is contracted to provide an ongoing service over a specified period of time. As the customer is consuming the benefits as the service is being provided the revenue is recognized over time ratably.

The Company’s policy is to

not

accept volume discounts, product returns, or rebates and allowances within its contracts. In the event a contract was approved with any of these terms, it would be evaluated for variable consideration, estimated and recorded as a reduction of revenue in the same period the related product revenue was recorded.

The Company provides assurance-type warranties on all product sales for a term of typically

one

three

years, and extended service-type warranties at the customers’ option for an additional term ranging up to

four

The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized. The Company has elected to recognize incremental costs of obtaining a contract as expense when incurred except in contracts where the amortization period would exceed

twelve

months; in such cases the long term amount will be assessed for materiality. The Company has elected to

not

adjust the promised amount of consideration for the effects of a significant financing component if the period of financing is

twelve

months or less.

The Company’s contracts with customers do

not

typically include extended payment terms and

may

include milestone billing over the life of the contract. Payment terms vary by contract type and type of customer and generally range from

days from delivery.

The following tables disaggregate the Company’s revenue by product line and by shipment destination:

	Year Ended March 31, 2020
Product Line:	Grid		Wind
Equipment and systems	$	44,065	$	12,282
Services and technology development		5,520		1,971
Total	$	49,585	$	14,253

Region:
Americas	$	33,207	$	87
Asia Pacific		10,407		13,996
EMEA		5,971		170
Total	$	49,585	$	14,253

	Year Ended March 31, 2019
Product Line:	Grid		Wind
Equipment and systems	$	26,645	$	19,287
Services and technology development		7,645		2,630
Total	$	34,290	$	21,917

Region:
Americas	$	22,811	$	112
Asia Pacific		7,267		21,200
EMEA		4,212		605
Total	$	34,290	$	21,917

In the fiscal years ended

March 31, 2020

and

2019

51%

and

74%

of the Company’s revenues, respectively, were recognized from sales outside the United States. The Company maintains operations in Austria, Romania, and the United States and sales and service support centers around the world.

As of

March 31, 2020

and

March 31, 2019

, the Company’s contract assets and liabilities primarily relate to the timing differences between cash received from a customer in connection with contractual rights to invoicing and the timing of revenue recognition following completion of performance obligations. The Company's accounts receivable balance is made up entirely of customer contract related balances. Changes in the Company’s contract assets, which are included in “Unbilled Accounts Receivable” and “De

ferred program costs” (see Note

“Accounts Receivable” and Note

“Inventory” for a reconciliation to the condensed consolidated balance sheet) and contract liabilities, which are included in the current portion and long term portion of “deferred revenue” in the Company’s condensed consolidated balance sheets, are as follows:

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2019	$	2,213		$	318		$	15,521
Increases for costs incurred to fulfill performance obligations		—			4,844			—
Increase (decrease) due to customer billings		(11,516	)		—			47,877
Decrease due to cost recognition on completed performance obligations		—			(3,525	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		15,017			—			(37,009	)
Other changes and FX impact		(3	)		(6	)		(247	)
Ending balance as of March 31, 2020	$	5,711		$	1,631		$	26,142

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2018	$	3,016		$	2,567		$	21,937
Impact of adoption of ASC 606		—			(1,599	)		(2,657	)
Increases for costs incurred to fulfill performance obligations		—			1,585			—
Increase (decrease) due to customer billings		(12,076	)		—			20,540
Decrease due to cost recognition on completed performance obligations		—			(2,212	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		11,324			(9	)		(23,084	)
Other changes and FX impact		(51	)		(14	)		(1,215	)
Ending balance as of March 31, 2019	$	2,213		$	318		$	15,521

The Company’s remaining performance obligations represent the unrecognized revenue value of the Company’s contractual commitments. The Company’s performance obligations

may

vary significantly each reporting period based on the timing of major new contractual commitments. As of

March 31, 2020

, the Company had outstanding performance obligations on existing contracts under ASC

606

to be recognized in the next

twelve

months of approximately $

61.4

million. There are also approximately $

8.2

million of outstanding performance obligations to be recognized over a period of

thirteen

sixty

months. The remaining performance obligations are subject to customer actions and therefore the timing of revenue recognition cannot be reasonably estimated. The

twelve

month performance obligations include anticipated shipments to Inox based on the

twelve

month rolling forecast provided by Inox on the multi-year supply contract. The quantities specified in any forecast provided by Inox related to the multi-year supply contract are firm and irrevocable for the

first

three

months of a

twelve

month rolling forecast. The timing of the performance obligations beyond the Inox-provided

twelve

month forecast are

not

determinable and therefore are

not

included in the total remaining performance obligations. See Note

“Nature of the Business and Operations and Liquidity,” for further information regarding the uncertainty of timing of the performance obligations as a result of the written notice that we sent to Inox on

May 29, 2020

notifying Inox of its default under the supply contract.

The following table sets forth customers who represented

10%

or more of the Company’s total revenues for the year ended

March 31, 2020

and

2019

		Year Ended
	Reportable	March 31,
	Segment	2020	2019
Department of Homeland Security	Grid	10%	<10%
Vestas	Grid	<10%	15%
Inox Wind Limited	Wind	<10%	34%

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Note 4 - Goodwill	12 Months Ended
Note 4 - Goodwill	Mar. 31, 2020
Notes to Financial Statements
Goodwill Disclosure [Text Block]	4. Goodwill The Company performed its annual assessment of goodwill on February 28, 2020 and noted no triggering events from the analysis date to March 31, 2020 and determined that there was no impairment to goodwill. Additionally, no impairment resulted from the assessment performed in the fiscal year ended March 31, 2019 .

Note 5 - Fair Value Measurements

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Fair Value Disclosures [Text Block]

Fair Value Measurements

A valuation hierarchy for disclosure of the inputs to valuation used to measure fair value has been established. This hierarchy prioritizes the inputs into

three

broad levels as follows:

Level 1	-	Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

Level 2	-	Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

Level 3	-	Unobservable inputs that reflect the Company’s assumptions that market participants would use in pricing the asset or liability. The Company develops these inputs based on the best information available, including its own data.

The Company provides a gross presentation of activity within Level

measurement roll-forward and details of transfers in and out of Level

and

measurements. A change in the hierarchy of an investment from its current level is reflected in the period during which the pricing methodology of such investment changes. Disclosure of the transfer of securities from Level

to Level

or Level

is made in the event that the related security is significant to total cash and investments. The Company did

not

have any transfers of assets and liabilities from Level

Level

or Level

of the fair value measurement hierarchy during the year ended

March 31, 2020

A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

Valuation Techniques

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of

three

months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level

of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Marketable Securities

Marketable securities consist of certificates of deposit with maturities of greater than

months that are measured using such inputs as quoted prices and are classified within Level

$0.1

million in unrealized gains on marketable securities, which is recorded in other income, for the fiscal year ending

March 31, 2020

and did

not

recognize any gains or losses on marketable securities in the fiscal year ended

March 31, 2019.

The Company periodically reviews the realizability of each short and long term marketable security when impairment indicators exist with respect to the security. If other than temporary impairment of value of the security exists, the carrying value of the security is written down to its estimated fair value.

Warrants

The Company issued warrants in conjunction with an equity offering to Hudson Bay Capital in

November 2014

and a Loan and Security Agreement with Hercules Technology Growth Capital, Inc. (“Hercules”). The warrants issued to Hercules were exercised on

April 8, 2019.

The warrants issued to Hudson were partially exercised on

November 13, 2019

and the remaining unexercised warrants expired on

November 13, 2019.

As of

March 31, 2020

the Company has

remaining outstanding warrants.

The Company historically relied on various assumptions in a lattice model to determine the fair value of warrants. The Company had valued the warrants within Level

of the valuation hierarchy. See Note

12,

“Warrants and Derivative Liabilities,” for a discussion of the warrants and the valuation assumptions used.

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of

March 31, 2020

and

2019

(in thousands):

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2020:
Assets:
Cash equivalents	$	19,394	$	19,394	$	—	$	—
Marketable securities	$	35,195	$	35,195	$	—	$	—

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2019:
Assets:
Cash equivalents	$	41,839	$	41,839	$	—	$	—
Derivative liabilities:
Warrants	$	4,942	$	—	$	—	$	4,942

The table below reflects the activity for the Company’s major classes of liabilities measured at fair value on a recurring basis (in thousands):

	Warrants
April 1, 2019	$	4,942
Mark to market adjustment		(4,648	)
Exercise of in-the-money warrants		(294	)
March 31, 2020	$	-

	Warrants
April 1, 2018	$	1,217
Mark to market adjustment		3,725
March 31, 2019	$	4,942

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Note 6 - Accounts Receivable

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Accounts Receivable [Text Block]

Accounts Receivable

Accounts receivable at

March 31, 2020

and

March 31, 2019

consisted of the following (in thousands):

	March 31, 2020		March 31, 2019
Accounts receivable (billed)	$	11,276	$	5,642
Accounts receivable (unbilled)		5,711		2,213
Accounts receivable	$	16,987	$	7,855

Note 7 - Inventory

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Inventory Disclosure [Text Block]

Inventory

Inventory, net of reserves, at

March 31, 2020

and

March 31, 2019

consisted of the following (in thousands):

	March 31, 2020		March 31, 2019
Raw materials	$	10,739	$	5,474
Work-in-process		1,345		1,922
Finished goods		5,260		4,405
Deferred program costs		1,631		318
Inventory	$	18,975	$	12,119

The Company recorded inventory write-downs of $

1.3

million and

$0.9

million for the fiscal years ended

March 31, 2020

and

2019

, respectively. These write downs were based on evaluating its inventory on hand for excess quantities and obsolescence.

Deferred program costs as of

March 31, 2020

and

March 31, 2019

primarily represent costs incurred on programs accounted for upon completion of the project when control has transferred to the customer before revenue and costs will be recognized.

Note 8 - Note Receivable

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Notes Receivable [Text Block]

Note Receivable

AMSC entered into a purchase and sale agreement dated

February 1, 2018

for the Devens facility (including land, building and building improvements) located at

Jackson Road, Devens, Massachusetts to

Jackson Road, LLC, a limited liability company, in the amount of

$23.0

million. The terms for payment included a

$1.0

million security deposit, and a note receivable for

$6.0

million payable to AMSC with the remaining cash net of certain adjustments for closing costs at the date of settlement.

The note receivable was due in

two

$3.0

million installments plus accrued interest at

1.96%

rate. The

first

installment was paid on

March 28, 2019

and the

second

installment was paid

May 23, 2019.

The note was subordinate to East Boston Savings Bank's mortgage on the Devens property. The note receivable was discounted to its present value of

$5.7

million utilizing a discount rate of

6%,

which was based on management’s assessment of what an appropriate loan at current market rate would be. The

$0.3

million discount was recorded as an offset to the long term portion of the note receivable. As of

March 31, 2019,

the remaining

$0.1

million discount was being amortized to interest income as an offset to the short-term portion of the note, over the remaining term of the note.

In addition, the resulting gain of

$0.1

million from the sale of the Devens property which was deferred previously was recorded as a component of the cumulative effect of an accounting change upon the adoption of ASU

2017

which was issued as a part of ASU

2014

09.

This gain was recorded as an offset to the opening accumulated deficit as of

April 1, 2018.

Note receivable as of

March 31, 2019

consisted of the following (in thousands):

	March 31, 2019
Current assets
Note receivable, current	$	3,000
Note receivable discount		(112	)
Total current note receivable	$	2,888

Long term assets
Note receivable, long term	$	—
Note receivable discount		—
Deferred gain on sale		—
Total long term note receivable	$	—

Note 9 - Property, Plant and Equipment

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

Property, Plant and Equipment

The cost and accumulated depreciation of property and equipment at

March 31, 2020

and

2019

are as follows (in thousands):

	March 31, 2020			March 31, 2019
Construction in progress - equipment	$	3,130		$	603
Equipment and software		41,737			45,705
Furniture and fixtures		1,302			1,269
Leasehold improvements		2,477			1,955
Property, plant and equipment, gross		48,646			49,532
Less accumulated depreciation		(40,081	)		(40,560	)
Property, plant and equipment, net	$	8,565		$	8,972

Depreciation expense was $

4.0

million and

$4.3

million, for the fiscal years ended

March 31, 2020

and

2019

, respectively. Construction in progress - equipment primarily includes capital investments in the Company's HTS equipment and leasehold improvements in the Company's leased facility in Ayer, Massachusetts.

Note 10 - Intangible Assets

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

10.

Intangible Assets

Intangible assets at

March 31, 2020

and

2019

consisted of the following (in thousands):

	2020							2019
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Core technology and know-how	$	5,970	$	(2,420	)	$	3,550	$	4,970	$	(2,080	)	$	2,890	5-10

The Company recorded intangible amortization expense of $

0.3

million and

$0.3

million, for the fiscal years ended

March 31, 2020

, and

2019

, respectively.

Expected future amortization expense related to intangible assets is as follows (in thousands):

Fiscal years ending March 31,	Total
2021	$	483
2022		483
2023		483
2024		483
2025		483
Thereafter		1,135
Total	$	3,550

The geographic composition of intangible assets is as follows (in thousands):

	March 31,
	2020		2019
Intangible assets by geography:
U.S.	$	3,550	$	2,890
Total	$	3,550	$	2,890

The business segment composition of intangible assets is as follows (in thousands):

	March 31,
	2020		2019
Intangible assets by business segments:
Grid	$	3,550	$	2,890
Total	$	3,550	$	2,890

Note 11 - Accounts Payable and Accrued Expenses

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

11.

Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at

March 31, 2020

and

March 31, 2019

consisted

of the following (in thousands):

	March 31, 2020		March 31, 2019
Accounts payable	$	10,045	$	2,939
Accrued inventories in-transit		763		244
Accrued other miscellaneous expenses		1,986		1,759
Advanced deposits		666		631
Accrued compensation		5,683		5,404
Income taxes payable		933		3,363
Accrued product warranty		2,015		1,545
Total	$	22,091	$	15,885

The Company generally provides a

one

three

year warranty on its products, commencing upon installation. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):

	Fiscal Years Ended March 31,
	2020			2019
Balance at beginning of period	$	1,545		$	1,769
Change in accruals for warranties during the period		542			727
Settlements during the period		(72	)		(951	)
Balance at end of period	$	2,015		$	1,545

Note 12 - Warrants and Derivative Liabilities

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Derivative Instruments and Hedging Activities Disclosure [Text Block]

12.

Warrants and Derivative Liabilities

The Company accounts for its warrants as liabilities due to certain adjustment provisions within the instruments, which require that they be recorded at fair value. The warrants are subject to revaluation at each balance sheet date and any change in fair value is recorded as a change in fair value of warrants until the earlier of its expiration or its exercise at which time the warrant liability will be reclassified to equity. The Company calculated the fair value of the warrants utilizing an integrated lattice model. See Note

“Fair Value Measurements” for further discussion.

Hercules Warrant

The Company issued Hercules warrants to purchase

13,927

shares of common stock (the “First Warrant”) and

25,641

shares of common stock (the “Second Warrant”) in conjunction with prior term loans that have been repaid in full. On

December 19, 2014,

the Company entered into a

second

amendment to the Loan and Security Agreement with Hercules (the "Hercules Second Amendment"). In conjunction with the Hercules Second Amendment, the Company issued Hercules a warrant to purchase

58,823

shares of the Company’s common stock (the "Hercules Warrant") which replaced the First Warrant and the Second Warrant. The Hercules Warrant was exercisable at any time after its issuance at an exercise price of

$7.85

per share, subject to certain price-based and other anti-dilution adjustments, including the equity offering in

May 2017,

the acquisition of Infinia Technology Corporation ("ITC") with common stock in

September 2017

and sales of common stock under the ATM entered into in

January 2017.

This warrant had a fair value of

$0.4

million as of

March 31, 2019

and

$0.1

million as of

March 31, 2018.

April 8, 2019

Hercules notified the Company of its intent to exercise this warrant on a cashless basis. Hercules received

22,821

shares of the Company's common stock on

April 17, 2019.

As a result of this exercise the Company recorded a net gain of

$0.1

million to change in fair value of warrants, resulting from the decrease in the fair value of the Hercules Warrant during the year ended

March 31, 2020.

The Company recorded a net loss of

$0.2

million to change in fair value of warrants, resulting from the increase in the fair value of the Hercules Warrant during the year ended

March 31, 2019.

November 2014

Warrant

November 13, 2014,

the Company completed an offering of

909,090

units of the Company’s common stock with Hudson Bay Capital. Each unit consisted of

one

share of the Company’s common stock and

0.9

of a warrant to purchase

one

share of common stock, or a warrant to purchase in the aggregate

818,181

shares (the

“November 2014

Warrant”). The

November 2014

Warrant was exercisable at any time, at an exercise price equal to

$7.81

per share, subject to certain price-based and other anti-dilution adjustments including those noted above. On

November 13, 2019,

Hudson partially exercised the

November 2014

Warrant for

786,000

restricted shares of Company common stock at

$7.81

per share. The remaining

32,181

warrants expired unexercised on

November 13, 2019.

As a result of this exercise the Company recorded a net gain

$4.6

million to change in fair value of warrants, resulting from the decrease in the fair value of the

November 2014

Warrant during the year ended

March 31, 2020

, and a net loss, resulting from an increase in the fair value of the

November 2014

Warrant, of

$3.5

million to change in fair value of derivatives and warrants in the fiscal year ended

March 31, 2019

. As of

March 31, 2020

, the Company has

remaining outstanding warrants

Following is a summary of the key assumptions used to calculate the fair value of the

November 2014

Warrant:

					September 30,		June 30,
Fiscal Year 2019					2019		2019
Risk-free interest rate						1.90%		2.11%
Expected annual dividend yield						—		—
Expected volatility						62.84%		60.58%
Term (years)						0.12		0.37
Fair value					$0.6 million		$1.7 million

	March 31,		December 31,		September 30,		June 30,		March 31,
Fiscal Year 2018	2019		2018		2018		2018		2018
Risk-free interest rate		2.43%		2.61%		2.62%		2.40%		2.20%
Expected annual dividend yield		—		—		—		—		—
Expected volatility		75.61%		70.29%		63.66%		67.40%		65.86%
Term (years)		0.62		0.87		1.12		1.37		1.62
Fair value	$4.6 million		$3.6 million		$1.3 million		$1.6 million		$1.1 million

Note 13 - Income Taxes

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Income Tax Disclosure [Text Block]

13.

Income Taxes

(Loss) income before income taxes for the fiscal years ended

March 31, 2020

, and

2019

are provided in the table as

follows

(in thousands):

	Fiscal years ended March 31,
	2020			2019
Income/(Loss) before income tax expense:
U.S.	$	(18,260	)	$	(24,289	)
Foreign		1,359			57,430
Total	$	(16,901	)	$	33,141

The components of income tax expense (benefit) attributable to continuing operations consist of the following (in thousands):

	Fiscal years ended March 31,
	2020			2019
Current
Federal	$	1,814		$	1,246
Foreign		95			4,399
Total current		1,909			5,645

Deferred
Federal		(1,524	)		1,588
Foreign		(190	)		(853	)
Total deferred		(1,714	)		735

Income tax expense	$	195		$	6,380

The reconciliation between the statutory federal income tax rate and the Company’s effective income tax rate is shown below.

	Fiscal years ended March 31,
	2020			2019
Statutory federal income tax rate		(21	)%		(21	)%
Foreign income tax rate differential		2			4
True-up of NOLs		1			(60	)
GILTI		1			37
Other		(6	)		3
Valuation allowance		24			92
Effective income tax rate		1	%		(19	)%

The following is a summary of the principal components of the Company’s deferred tax assets and liabilities (in thousands):

	March 31, 2020			March 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$	195,504		$	181,657
Research and development and other tax credit carryforwards		13,244			13,046
Accruals and reserves		5,352			14,781
Fixed assets and intangible assets		1,697			1,553
Other		1,565			2,785
Gross deferred tax assets		217,362			213,822
Valuation allowance		(199,989	)		(196,340	)
Total deferred tax assets		17,373			17,482

Deferred tax liabilities:
Intercompany Debt		(14,365	)		(16,028	)
Other		(1,637	)		(1,794	)
Total deferred tax liabilities		(16,002	)		(17,822	)
Net deferred tax asset	$	1,371		$	(340	)

March 27, 2020,

the United States enacted the Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). The Cares Act is an emergency economic stimulus package that includes spending and tax breaks to strengthen the United States economy and fund a nationwide effort to curtail the effect of COVID-

19.

While the CARES Act provides sweeping tax changes in response to the COVID-

pandemic, some of the more significant provisions include removal of certain limitations on utilization of net operating losses, increasing the loss carryback period for certain losses to

five

years, and increasing the ability to deduct interest expense, as well as amending certain provisions of the previously enacted Tax Cuts and Jobs Act of

2017.

The CARES Act is

not

expected to have a material impact on the Company’s financial position, results of operations or cash flows.

The Company has provided a full valuation allowance against its net deferred income tax assets in the U.S. and China since it is more likely than

not

that its deferred tax assets will

not

be realizable. After consideration of all the available evidence, both positive and negative, the Company has determined that a

$200.0

million valuation allowance at

March 31, 2020

is necessary to reduce the deferred tax assets to the amount that will more likely than

not

be realized.

March 31, 2020

, the Company had aggregate net operating loss carryforwards in the U.S. for federal and state income tax purposes of approximately

$799.2

million and

$203.6

million, respectively, which expire in the years ending

March

31,

2020

through

2040.

For U.S. federal tax purpose, approximately

$54.0

million of Federal net operating losses have an indefinite carryforward period. Included in the U.S. net operating loss are

$3.7

million of acquired losses from Power Quality Systems, Inc. and

$0.3

million of acquired losses from Infinia Technology Corporation. Research and development and other tax credit carryforwards amounting to approximately

$10.1

million and

$3.5

million are available to offset federal and state income taxes, respectively, and will expire in the years ending

March

31,

2020

through

2040.

March 31, 2020

, the Company had aggregate net operating loss carryforwards for its Chinese operation of approximately

$56.0

million, which can be carried forward for

five

years and begin to expire

December

31,

2020.

Section

382

of the U.S. Internal Revenue Code of

1986,

as amended (the “IRC”), provides limits on the extent to which a corporation that has undergone an ownership change (as defined) can utilize any net operating loss ("NOL") and general business tax credit carryforwards it

may

have. The Company last updated its study for the acquisition of ITC. The Company increased its NOL’s by

$0.3

million due to acquired losses in the fiscal year ended

March 31, 2018

from ITC. The Company conducted a study on the acquired NOL and concluded that the limitations under Section

382

will

not

have a material impact on its ability to utilize its NOL carryforwards. If there were material ownership changes subsequent to the study, such changes could limit the Company's ability to utilize its NOL carryforwards.

The total amount of undistributed foreign earnings available to be repatriated at

March 31, 2020

was

$1.9

million resulting in the recording of a

$0.2

million deferred tax liability for foreign withholding taxes.

The Company has

not

recorded a deferred tax asset for the temporary difference associated with the excess of the tax greater than the book basis in its Chinese subsidiary as the future tax benefit is

not

expected to reverse in the foreseeable future.

Accounting for income taxes requires a

two

-step approach to recognizing and measuring uncertain tax positions. The

first

step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than

not

that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The

second

step is to measure the tax benefit as the largest amount that is more than

50%

likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but

not

identify any uncertain tax positions at

March 31, 2020

. The Company did

not

have any gross unrecognized tax benefits at

March 31, 2020

2019

There were

reversals of uncertain tax positions in the fiscal years ended

March 31, 2020

and

2019

The Company accounts for interest and penalties related to uncertain tax positions as part of its provision for federal and state income taxes. Any unrecognized tax benefits, if recognized, would favorably affect its effective tax rate in any future period. The Company does

not

expect that the amounts of unrecognized benefits will change significantly within the next

twelve

months.

The Company conducts business globally and, as a result, its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. Major tax jurisdictions include the U.S., China, Romania and Austria. All U.S. income tax filings for fiscal years ended

March

31,

1996

through

2020

remain open and subject to examination.

All fiscal years from the fiscal year ended

March 31, 2018

through

2020

remain open and subject to examination in Austria. As of

March 31, 2020

, the Company remains open to audit for the calendar years

2015

and forward in China. Tax filings in Romania for the fiscal years ended

March 31, 2016

through

2020

remain open and subject to examination.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Note 14 - Leases

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Lessee, Operating Leases [Text Block]

14.

Leases

April 1, 2019,

the Company adopted ASU

2016

02,

Leases (Topic

842

)

("ASC

842"

), using the modified retrospective approach. The Company elected the package of practical expedients available in the standard and as a result, did

not

reassess the lease classification of existing contracts or leases or the initial direct costs associated with existing leases. The Company did

not

elect the hindsight practical expedient and evaluated lease terms for existing leases. The Company has also elected the practical expedient to

not

separate lease components and non-lease components and will account for the leases as a single lease component for all classes of leases.

As a result of the adoption of ASC

842,

the Company recognized lease right-of-use assets of

$3.8

million, and operating lease liabilities of

$3.8

million. There was

impact to the condensed consolidated statements of operations or stockholders' equity for the adoption of ASC

842.

impairment was recognized on the right-of-use asset upon adoption. These adjustments are detailed as follows:

	March 31, 2019		ASC 842 Adjustment		April 1, 2019
Operating Leases:
Right of use asset	$	—	$	3,795	$	3,795
Total operating lease right-of-use asset		—		3,795		3,795

Operating lease liabilities – ST	$	—	$	309	$	309
Operating lease liabilities – LT		—		3,512		3,512
Total operating lease liabilities		—		3,821		3,821

Weighted-average remaining lease term					7.69 years
Weighted-average discount rate						7.06	%

All significant lease arrangements are recognized at lease commencement. Operating lease right–of-use assets and lease liabilities are recognized at commencement. The operating lease right-of-use asset includes any lease payments related to initial direct cost and prepayments and excludes any lease incentives. Lease expense is recognized on a straight-line basis over the lease term. The Company enters into a variety of operating lease agreements through the normal course of its business, but primarily real estate leases to support its operations. The agreements generally provide for fixed minimum rental payments and the payment of real estate taxes and insurance. Many of these leases have

one

or more renewal options that allow the Company, at its discretion, to renew the lease for varying periods up to

five

years or to terminate the lease. Only renewal options or termination rights that the Company believed were likely to be exercised were included in the lease calculations.

The Company also enters into leases for vehicles, IT equipment and service agreements, and other leases related to its manufacturing operations that are also included in the right-of-use asset and lease liability accounts if they are for a term of longer than

twelve

months. However, many of these leases are either short-term in nature or immaterial. The Company has made the policy election to exclude short-term leases from the balance sheet.

The discount rate was calculated using an incremental borrowing rate based on an assessment prepared by the Company through the use of Company credit ratings, consideration of its lease populations potential risk to its total capital structure, and a market rate for a collateralized loan for its risk profile, calculated by a

third

party. The Company elected to apply the discount rate using the remaining lease term at the date of adoption.

The Company did

not

identify any leases that are classified as financing leases.

Supplemental balance sheet information related to leases at

March 31, 2020

are as follows:

	March 31, 2020
Operating Leases:
Right-of-use assets	$	3,359
Total right-of-use assets		3,359

Lease liabilities - ST	$	439
Lease liabilities - LT		3,000
Total operating lease liabilities	$	3,439

Weighted-average remaining lease term	6.91 years
Weighted-average discount rate		7.08	%

The costs related to the Company's leases for the year ended

March 31, 2020

are included in selling, general and administrative costs and are as follows:

	Year ended
	March 31, 2020
Operating Lease:
Operating lease costs - fixed	$	713
Operating lease costs - variable		100
Short-term lease costs		544
Total lease costs	$	1,357

The Company’s estimated minimum future lease obligations under the Company's leases are as follows:

	Operating Leases
Year ended March 31,
2021	$	665
2022		647
2023		621
2024		559
2025		501
Thereafter		1,394
Total minimum lease payments		4,387
Less: interest		(948	)
Present value of lease liabilities	$	3,439

Note 15 - Stockholders' Equity

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

15.

Stockholders’ Equity

Stock-Based Compensation Plans

As of

March 31, 2020

, the Company had

two

active stock plans: the

2007

Stock Incentive Plan, as amended (the

“2007

Plan”) and the Amended and Restated

2007

Director Stock Plan (the

“2007

Director Plan”). On

August 1, 2019,

the Company’s stockholders approved amendments to the

2007

Plan and the

2007

Director Plan. The amendment to the

2007

Plan increased the total number of shares of common stock authorized for issuance under the

2007

Plan from

3,400,000

shares to

4,600,000

shares. The amendment to the

2007

Director Plan increased the total number of shares of common stock authorized for issuance under the

2007

Director Plan from

230,000

shares to

280,000

shares.

The

2007

Plan provides for the grant of incentive stock options intended to qualify under Section

422

of the IRC of

1986,

as amended, nonstatutory stock options, stock appreciation rights, restricted stock, restricted stock units and other stock-based awards. In the case of options, the exercise price is

less than the fair market value of the common stock, as determined by (or in a manner approved by) the Board of Directors, on the date of grant. The contractual life of options is generally

years. Options generally vest over a

year period while restricted stock generally vests over a

year period.

The

2007

Director Plan provides for the grant of nonstatutory stock options and stock awards to members of the Board of Directors who are

not

also employees of the Company ("outside directors"). Under the terms of the

2007

Director Plan, each outside director is granted an option to purchase shares of common stock with an aggregate grant date value equal to

$40,000

upon his or her initial election to the Board with an exercise price equal to the fair market value of the Company’s common stock on the date of the grant. These options vest in equal annual installments over a

two

-year period. In addition, each outside director is granted an award of shares of common stock with an aggregate grant date value equal to

$40,000

as of the closing price

three

business days following the last day of each fiscal year, subject to proration for any partial fiscal year of service.

As of

March 31, 2020

, the

2007

Plan had

1,249,930

shares available for future issuance and the

2007

Director Plan had

108,474

shares available for future issuance.

Stock-Based Compensation

The components of stock-based compensation for the years ended

March 31, 2020

and

2019

were as follows (in thousands):

	Fiscal years ended March 31,
	2020		2019
Stock options	$	16	$	221
Restricted stock and stock awards		1,870		2,781
Employee stock purchase plan		36		28
Total stock-based compensation expense	$	1,922	$	3,030

The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The total unrecognized compensation cost for unvested outstanding stock options was $

0.1

million for the fiscal year ended

March 31, 2020

. This expense will be recognized over a weighted-average expense period of approximately

1.2

years. The total unrecognized compensation cost for unvested outstanding restricted stock was $

3.4

million for the fiscal year ended

March 31, 2020

. This expense will be recognized over a weighted-average expense period of approximately

1.6

years.

The following table summarizes stock-based compensation expense by financial statement line item for the fiscal years ended

March 31, 2020

and

2019

(in thousands):

	Fiscal years ended March 31,
	2020		2019
Cost of revenues	$	66	$	116
Research and development		333		365
Selling, general and administrative		1,522		2,549
Total	$	1,922	$	3,030

The following table summarizes the information concerning currently outstanding and exercisable employee and non-employee options:

	Options / Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value (thousands)
Outstanding at March 31, 2019		164,265		$	96.30
Granted		5,939			11
Canceled/forfeited		(29,923	)		296.62
Outstanding at March 31, 2020		140,281		$	49.95		2.91	$	—
Exercisable at March 31, 2020		134,342		$	51.68		2.9	$	—
Fully vested and expected to vest at March 31, 2020		140,061		$	50.01		2.63	$	—

The Company granted options to purchase

5,939

shares of common stock during the year ended

March 31, 2020

. The Company did

not

grant any stock options during the

three

and

twelve

months ended

March 31, 2019

. The stock options granted during the year ended

March 31, 2020

will vest over

years. The weighted average assumptions used in the Black Scholes valuation model for stock options granted during the year ended

March 31, 2020

are as follows:

	Fiscal years ended March 31,
	2020			2019
Expected volatility		66.5	%		N/A
Risk-free interest rate		1.8	%		N/A
Expected life (years)		5.91			N/A
Dividend yield	None				N/A

The following table summarizes the employee and non-employee restricted stock activity for the year ended

March 31, 2020

	Shares			Weighted Average Grant Date Fair Value		Intrinsic Aggregate Value (thousands)
Outstanding at March 31, 2019		953,948		$	5.26
Granted		389,174			8.74
Vested		(332,375	)		6.21
Forfeited		(28,500	)		7.22
Outstanding at March 31, 2020		982,247		$	6.26	$	5,383

The total fair value of restricted stock that was granted during the fiscal years ended

March 31, 2020

and

2019

was

$3.4

million and

$3.6

million, respectively. The total fair value of restricted stock that vested during the fiscal years ended

March 31, 2020

and

2019

was

$2.9

million and

$2.6

million, respectively.

There we

94,500

performance-based restricted shares awarded during th

e fiscal year ended

March 31, 2020

for which the performance conditions are deemed probable to be met and the expense is being recorded over the expected vesting period. There were

57,000

performance-based restricted shares awarded during the fiscal year ended

March 31, 2019

of which

28,500

vested and the remaining

28,500

expired during fiscal

2019.

The remaining shares awarded vest upon the passage of time. For awards that vest upon the passage of time, expense is being recorded over the vesting period.

Employee Stock Purchase Plan

The Company maintains the

2000

Employee Stock Purchase Plan, as amended (the "ESPP") which provides employees with the opportunity to purchase shares of common stock at a price equal to the market value of the common stock at the end of the offering period, less a

15%

purchase discount. As of

March 31, 2020

, the ESPP had

203,134

shares available for future issuance. The Company recognized less than

$0.1

million of compensation expense for both the fiscal year ended

March 31, 2020

and

2019

, related to the ESPP.

Note 16 - Commitments and Contingencies	12 Months Ended
Note 16 - Commitments and Contingencies	Mar. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	16. Commitments and Contingencies Purchase Commitments The Company periodically enters into non-cancelable purchase contracts in order to ensure the availability of materials to support production of its products. Purchase commitments represent enforceable and legally binding agreements with suppliers to purchase goods or services. The Company periodically assesses the need to provide for impairment on these purchase contracts and record a loss on purchase commitments when required. Lease Commitments During the year ended March 31, 2020 all leases were recorded in Lease expense. See Note 14, "Leases" for further details. For the year ended March 31, 2019 rent expense was $1.3 million. See Item 2, “Properties” for further information. Legal Contingencies From time to time, the Company is involved in legal and administrative proceedings and claims of various types. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in a liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss to the extent necessary to make the consolidated financial statements not misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its consolidated financial statements. Other The Company enters into long-term construction contracts with customers that require the Company to obtain performance bonds. The Company is required to deposit an amount equivalent to some or all the face amount of the performance bonds into an escrow account until the termination of the bond. When the performance conditions are met, amounts deposited as collateral for the performance bonds are returned to the Company. In addition, the Company has various contractual arrangements in which minimum quantities of goods or services have been committed to be purchased on an annual basis. As of March 31, 2020 , the Company had $ 5.7 million of restricted cash included in long-term assets and $ 0.5 million of restricted cash in current assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts including the irrevocable letter of credit in the amount of $5.0 million to secure certain of the Company’s obligations under the Subcontract Agreement with Commonwealth Edison Company. These deposits are held in interest bearing accounts.

Note 17 - Employee Benefit Plans	12 Months Ended
Note 17 - Employee Benefit Plans	Mar. 31, 2020
Notes to Financial Statements
Retirement Benefits [Text Block]	17. Employee Benefit Plans The Company has implemented a defined contribution plan (the “Plan”) under Section 401 (k) of the IRC. Any contributions made by the Company to the Plan are discretionary. The Company has a stock match program under which the Company matched, in the form of Company common stock, 50% of the first 6% of eligible contributions. The Company recorded expense of $0.3 million for the fiscal year ended March 31, 2020 , and $0.3 million for the fiscal year ended March 31, 2019 , and recorded corresponding charges to additional paid-in capital related to this program.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Note 18 - Restructuring

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Restructuring and Related Activities Disclosure [Text Block]

18.

Restructuring

The Company accounts for charges resulting from operational restructuring actions in accordance with ASC Topic

420,

Exit or Disposal Cost Obligations

(“ASC

420”

) and ASC Topic

712,

Compensation—Nonretirement Postemployment Benefits

(“ASC

712”

). In accounting for these obligations, the Company is required to make assumptions related to the amounts of employee severance, benefits, and related costs and the time period over which leased facilities will remain vacant, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation arises. These estimates are reviewed and revised as facts and circumstances dictate; changes in these estimates could have a material effect on the amount accrued on the consolidated balance sheet.

The

$0.5

million charged to operations in the fiscal year ended

March 31, 2019

was related to exit costs incurred primarily during the

first

half of fiscal

2018

for the move of the Company's corporate office.

The following table presents restructuring charges and cash payments during the year ended

March 31, 2019 (

in thousands):

	Severance pay and benefits			Facility exit and Relocation costs			Total
Accrued restructuring balance at April 1, 2018	$	262		$	173		$	435
Charges to operations		—			450			450
Cash payments		(262	)		(623	)		(885	)
Accrued restructuring balance at March 31, 2019	$	—		$	—		$	—

All restructuring charges discussed above are included within restructuring in the Company’s consolidated statements of operations. The Company includes accrued restructuring within accounts payable and accrued expenses in the consolidated balance sheets. There was

restructuring activity in the year ended

March 31, 2020

or any remaining accrued restructuring balance as of

March 31, 2020

2019

Note 19 - Business Segments

12 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

19.

Business Segments

The Company reports its financial results in

two

reportable business segments: Grid and Wind.

Through the Company’s power grid offerings, the Grid business segment enables electric utilities, industrial facilities, and renewable energy project developers to connect, transmit and distribute smarter, cleaner and better power through its transmission planning services, power electronics, and superconductor-based systems. The sales process is enabled by transmission planning services that allow it to identify power grid congestion, poor power quality and other risks, which helps the Company determine how its solutions can improve network performance. These services often lead to sales of grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems. The Company also sells ship protection products to the U.S. Navy through its Grid business segment.

Through the Company’s wind power offerings, the Wind business segment enables manufacturers to field highly competitive wind turbines through its advanced power electronics and control system products, engineered designs, and support services. The Company supplies advanced power electronics and control systems, licenses its highly engineered wind turbine designs, and provides extensive customer support services to wind turbine manufacturers. The Company’s design portfolio includes a broad range of drive trains and power ratings of

megawatts ("MWs") and higher. The Company provides a broad range of power electronics and software-based control systems that are highly integrated and designed for optimized performance, efficiency, and grid compatibility.

The

operating

results for the

two

business segments are as follows (in thousands):

	Fiscal Years Ended March 31,
	2020		2019
Revenues:
Grid	$	49,585	$	34,290
Wind		14,253		21,917
Total	$	63,838	$	56,207

	Fiscal Years Ended March 31,
	2020			2019
Operating income (loss):
Grid	$	(13,508	)	$	(10,600	)
Wind		(7,699	)		48,103
Unallocated corporate expenses		(1,922	)		(3,480	)
Total	$	(23,129	)	$	34,023

Total assets for the

two

business segments as of

March 31, 2020

and

March 31, 2019

are as follows (in thousands):

	March 31, 2020		March 31, 2019
Grid	$	44,044	$	31,075
Wind		14,250		8,167
Corporate assets		65,815		80,088
Total	$	124,109	$	119,330

The accounting policies of the business segments are the same as those for the consolidated Company. The Company’s business segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measures are segment revenues and segment operating income (loss). The disaggregated financial results of the segments reflect allocation of certain functional expense categories consistent with the basis and manner in which Company management internally disaggregates financial information for the purpose of assisting in making internal operating decisions. In addition, certain corporate expenses which the Company does

not

believe are specifically attributable or allocable to either of the

two

business segments have been excluded from the segment operating income (loss).

Unallocated corporate expenses primarily consist of stock-based compensation expense of $

1.9

million and

$3.0

million, in the fiscal years ended

March 31, 2020

and

2019

, respectively, and restructuring charges of

$0.5

million for the fiscal year ended

March 31, 2019

Geographic information about property, plant and equipment associated with particular regions is as follows (in thousands):

	March 31,
	2020		2019
North America	$	8,113	$	8,555
Europe		397		345
Asia Pacific		55		72
Total	$	8,565	$	8,972

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Note 20 - Recent Accounting Pronouncements	12 Months Ended
Note 20 - Recent Accounting Pronouncements	Mar. 31, 2020
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	20. Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016 - 13, Financial Instruments-Credit Losses (Topic 326 ): Measurement of Credit Losses on Financial Instruments . The amendments in ASU 2016 - 13 will provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year. Following the release of ASU 2019 - 10 in November 2019, the new effective date, as long as the Company remains a smaller reporting company, would be annual reporting periods beginning after December 15, 2022. The Company is currently evaluating the impact, if any, the adoption of ASU 2016 - 13 may have on its consolidated financial statements. In July 2017, the FASB issued ASU 2017 - 11, Earnings per Share (Topic 260 ), Distinguishing Liabilities from Equity (Topic 480 ), and Derivatives and Hedging (Topic 815 ) . The amendments in ASU 2017 - 11 provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round featur e. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. As of April 1, 2019 the Company has adopted ASU 2017 - 11 and noted no significant impact on its consolidated financial statements, primarily due to the put option feature which required continued liability classification under ASC 840. In August 2017, the FASB issued ASU 2017 - 12, Derivatives and Hedging (Topic 815 ): Targeted Improvements to Accounting for Hedging Activities . The amendments in ASU 2017 - 12 provide improved financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of the hedge accounting guidance. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. As of April 1, 2019 the Company has adopted ASU 2017 - 12 and noted no significant impact on its consolidated financial statements, primarily due to the fact that there are no longer any hedging instruments included in its results. In June 2018, the FASB issued ASU 2018 - 08, Not -For-Profit Entities (Topic 958 ): Clarifying the Scope and the Accounting Guidance for Contributions Received and Contributions Made . The amendments in ASU 2018 - 08 assist entities in ( 1 ) evaluating whether transactions should be accounted for as contributions (nonreciprocal transactions) within the scope of Topic 958, Not -for-Profit Entities, or as exchange (reciprocal) transactions subject to other guidance and ( 2 ) determining whether a contribution is conditional. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. As of April 1, 2019, the Company has adopted ASU 2018 - 08 and noted additional disclosures within its revenue footnote to appropriately present the revenue related to its grant revenue. In August 2018, the FASB issued ASU 2018 - 13, Fair Value Measurement (Topic 820 ): Changes to the Disclosure Requirements for Fair Value Measurement . The amendments in ASU 2018 - 13 provide for increased effectiveness of the disclosures made around fair value measurements while including consideration for costs and benefits. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those periods. As the Company currently does not report on any level 3 fair value measurements, it is not expecting any material changes to its financial statements with the adoption of ASU2018 - 13. In December 2019, the FASB issued ASU 2019 - 12, Income Taxes (Topic 740 ): Simplifying the Accounting for Income Taxes . The amendments in ASU 2019 - 12 provide for simplified accounting to several income tax situations and removal of certain accounting exceptions. The ASU is effective for annual reporting periods beginning after December 15, 2020, including interim periods within those periods. The Company does not expect the impact of the adoption of ASU 2019 - 12 to be material to its consolidated financial statements.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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+ Details

Note 21 - Subsequent Events	12 Months Ended
Note 21 - Subsequent Events	Mar. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	21. Subsequent Events The Company has performed an evaluation of subsequent events through the time of filing this Annual Report on Form 10 -K with the SEC, and has determined that other than the notice of default discussed in Note 1, there are no such events to report.

Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Nature of Business and Operations, Policy [Policy Text Block]

Nature of the Business and Operations

American Superconductor Corporation (together with its subsidiaries, “AMSC®” or the “Company”) was founded on

April

1987.

The Company is a leading system provider of megawatt-scale power solutions that enhance the performance of the power grid, protect the Navy’s fleet, and lower the cost of wind power. The Company’s products leverage its proprietary “smart materials” and “smart software and controls” to provide enhanced resiliency and improved performance of megawatt-scale power flow.

The Company’s consolidated financial statements have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form

-K. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business.

Liquidity, Policy [Policy Text Block]

Liquidity

The Company has historically experienced recurring operating losses and as of

March 31, 2020

, the Company had an accumulated deficit of $

978.6

million. In addition, the Company has historically experienced recurring negative operating cash flows. At

March 31, 2020

, the Company had cash, cash equivalents, and marketable securities of $

59.9

million. Marketable securities include certificate of deposits with maturities between

eleven

and

eighteen

months. Cash used in operations for the year ended

March 31, 2020

was $

16.5

million.

July

2018,

the Company and its wholly-owned subsidiaries Suzhou AMSC Superconductor Co. Ltd. (“AMSC China”) and AMSC Austria GMBH (“AMSC Austria”) entered into a settlement agreement (the “Settlement Agreement”) with Sinovel Wind Group Co., Ltd. (“Sinovel”). The Settlement Agreement settled the litigation and arbitration proceedings between the Company and Sinovel. Under the terms of the Settlement Agreement, Sinovel agreed to pay AMSC China an aggregate cash amount in Renminbi (“RMB”) equivalent to

$57.5

million, consisting of

two

installments. Sinovel paid the

first

installment of the RMB equivalent of

$32.5

million on

July

2018,

which was repatriated to the U.S. entity during the

nine

months ended

December

31,

2018,

and paid the

second

installment of the RMB equivalent of

$25.0

million on

December 27, 2018.

The Company's fiscal

2018

results include the net gain received from the settlement with Sinovel of

$52.7

million.

February 1, 2018,

ASC Devens LLC (the “Seller”), a wholly-owned subsidiary of the Company, entered into a Purchase and Sale Agreement (the “PSA”) with

Jackson, LLC (the “Purchaser”) and Stewart Title Guaranty Company (“Escrow Agent”), to effectuate the sale of certain real property located at

Jackson Road, Devens, Massachusetts, including the building that had served as the Company’s headquarters (collectively, the “Property”), in exchange for total consideration of

$23.0

million, composed of (i) cash consideration of

$17.0

million, and (ii) a

$6.0

million subordinated secured commercial promissory note payable to the Company (the “Seller Note”). Subsequently, the Seller, the Purchaser and Jackson

MGI, LLC (“Assignee”) entered into an Assignment of Purchase and Sale Agreement (the “Assignment Agreement”), pursuant to which the Purchaser assigned all of its rights and interests in the PSA to the Assignee and the Assignee agreed to assume all of the Purchaser’s obligations and liabilities under the PSA. The transaction closed on

March 28, 2018,

at which time the Company received, from the Assignee, cash consideration, net of certain agreed upon closing costs, of

$16.9

million, and the Seller Note at an interest rate of

1.96%.

The Seller Note is secured by a subordinated

second

mortgage on the Property and a subordinated

second

assignment of leases and rents. The Company received the

first

$3.0

million payment due pursuant to the Seller Note on

March 28, 2019

and the

second

$3.0

million payment plus interest on

May 23, 2019.

December 2015,

the Company entered into a set of strategic agreements valued at approximately

$210.0

million with Inox Wind Ltd. (“Inox” or “Inox Wind”), which includes a multi-year supply contract pursuant to which the Company will supply electrical control systems to Inox and a license agreement allowing Inox to manufacture a limited number of electrical control systems. After Inox purchases the specified number of electrical control systems required under the terms of the supply contract, Inox agreed that the Company will continue as Inox’s preferred supplier and Inox will be required to purchase from the Company a majority of its electrical control systems requirements for an additional

three

-year period. Pursuant to these strategic agreements, Inox must forecast future purchase orders of sets of Electrical Control Systems ("ECS") which become firm orders

three

months prior to shipment, and Inox must post letters of credit before the Company will ship such orders. Inox is currently delinquent on its obligation to post letters of credit for sets of ECS that Inox forecasted to purchase under the terms of the supply contract. On

May 29, 2020,

the Company sent written notice to Inox notifying Inox of its default under the supply contract due to Inox’s failure to post letters of credit in the amount of

€6.0

million for the payment of ECS that Inox is obligated to purchase under the terms of the supply contract. If Inox fails to post letters of credit in the amount of

€6.0

million in accordance with the terms of the supply contract within the

ninety

day cure period after receipt of the default notice, then the Company

may

terminate the supply contract by providing written notice of such termination to Inox. We cannot predict if and when Inox will post letters of credit consistent with the forecasted ECS quantities. Inox’s failure to post letters of credit and take delivery of forecasted ECS quantities would impact the Company’s revenues and liquidity. In the event the Company were to terminate the supply contract, the Company's revenues and liquidity would be impacted.

The Company issued warrants in conjunction with an equity offering to Hudson Bay Capital ("Hudson") in

November 2014 (

the "Hudson Warrant"). The Hudson Warrant was partially exercised on

November 13, 2019

with an exercise price of

$7.81.

The Company received

$6.1

million in cash for the exercise of

786,000

warrants. The remaining

32,181

warrants expired unexercised on

November 13, 2019.

March 2020,

the World Health Organization declared the disease caused by the novel coronavirus (“COVID-

19“

) to be a pandemic. COVID-

has spread throughout the globe, including in the Commonwealth of Massachusetts where the Company’s headquarters are located, and in other areas where the Company has business operations. In response to the outbreak, the Company has followed the guidelines of the U.S. Centers for Disease Control and Prevention (“CDC”) and applicable state government authorities to protect the health and safety of the Company’s employees, families, suppliers, customers and communities. While these existing measures and, COVID-

generally, have

not

materially disrupted the Company’s business to date, any future actions necessitated by the COVID-

pandemic

may

result in disruption to the Company’s business.

While the COVID-

pandemic continues to rapidly evolve, the Company continues to assess the impact of the COVID-

pandemic to best mitigate risk and continue the operations of the Company’s business. The extent to which the outbreak impacts the Company’s business, liquidity, results of operations and financial condition will depend on future developments, which are highly uncertain and cannot be predicted with confidence, including new information that

may

emerge concerning the severity of the COVID-

pandemic and the actions to contain it or treat its impact, among others. If the Company, its customers or suppliers experience prolonged shutdowns or other business disruptions, the Company’s business, liquidity, results of operations and financial condition are likely to be materially adversely affected, and the Company’s ability to access the capital markets

may

be limited.

The Company believes that based on the information presented above and its annual management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next

twelve

months following the issuance of the financial statements for the year ended

March 31, 2020

. The Company’s liquidity is highly dependent on its ability to increase revenues, including its ability to collect revenues under its agreements with Inox, its ability to control its operating costs, and its ability to raise additional capital, if necessary. The impact of the COVID-

pandemic on the global financing markets

may

reduce the Company's ability to raise additional capital, if necessary, which could negatively impact the Company's liquidity. There can be

assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

Consolidation, Policy [Policy Text Block]

Basis of Consolidation

effect on net income, cash flows from operating activities or stockholders’ equity.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

not

may

differ from these estimates under different assumptions or conditions. While for any given estimate or assumption made by the Company’s management there

may

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of

three

months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level

of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Marketable Securities, Policy [Policy Text Block]

Marketable Securities

Marketable securities consist of certificates of deposit with maturities of greater than

months that are measured using such inputs as quoted prices and are classified within Level

Receivable [Policy Text Block]

Accounts Receivable

March 31, 2020

Fuji Bridex Pte. Ltd. accounted for approximately

25%,

Department of Homeland Security accounted for

18%,

and Doosan Heavy Industries & Construction Co., Ltd. accounted for approximately

17%

of the Company's total receivable balance, with

other customer accounting for greater than

10%

of the balance. As of

March 31, 2019

, Vestas accounted for approximately

21%

and RES System

LLC accounted for approximately

16%

of the Company’s total receivable balance, with

other customer accounting for greater than

10%

of the balance. Changes in the financial condition or operations of the Company’s customers

may

result in delayed payments or non-payments which would adversely impact its cash flows from operating activities and/or its results of operations. As such, the Company

may

Inventory, Policy [Policy Text Block]

Inventory

Inventories include material, direct labor and related manufacturing overhead, and are stated at the lower of cost, determined on a

first

-in,

first

-out basis, or net realizable value determined on a

first

-in,

first

Program costs

may

be deferred and recorded as inventory on contracts on which costs are incurred in excess of approved contractual amounts and/or funding, if future recovery of the costs is deemed probable.

not

written back up if demand increases.

For the fiscal years ended

March 31, 2020

and

2019

, the Company recorded inventory reserves of approximately $

1.3

million and

$0.9

million, respectively, based on evaluating its ending inventory on hand for excess quantities and obsolescence.

Lessee, Leases [Policy Text Block]

Leases

The majority of the Company's leases are classified as operating leases, and therefore the expense is captured in income from operations each period.

We have elected to exclude all leases of less than

twelve

months from the balance sheet presentation. We have also elected a policy in which we will

not

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment

Asset Classification		Estimated Useful Life in Years
Machinery and equipment		3-10
Furniture and fixtures		3-5
Leasehold improvements		Shorter of the estimated useful life or the remaining lease term

Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]

Valuation of Long-Lived Assets

may

not

may

not

be recoverable from the estimated undiscounted future cash flows.

There were

indicators requiring impairment testing on the Company's long-lived assets during the fiscal years ended

March 31, 2020

and

2019

Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]

Goodwill

Goodwill represents the excess of cost over net assets of acquired businesses that are consolidated. The Company performs its annual assessment of goodwill on

February

28th

of each fiscal year and whenever events or changes in circumstances or a triggering event indicate that the carrying amount

may

not

be recoverable. Determining whether a triggering event has occurred often involves significant judgment from management. An entity is permitted to

first

assess qualitatively whether it is necessary to perform a goodwill impairment test. The quantitative impairment test is required only if the entity concludes that it is more likely than

not

to exceed the total amount of the goodwill allocated to the that reporting unit. See Note

"Acquisition and Related Goodwill" for further information and discussion.

The Company performed its annual assessment of goodwill on

February 28, 2020

and noted

triggering events from the analysis date to

March 31, 2020

and determined that there was

impairment to goodwill. Additionally, there was

impairment identified for the fiscal year ended

March 31, 2019

based on the assessment performed in the prior fiscal year.

Revenue [Policy Text Block]

Revenue Recognition

Revenue contracts are defined as an arrangement that creates enforceable rights and obligations of both parties where collection of the contract price is deemed probable.

The Company records revenue based on a

five

can occur at the time of delivery, installation or post-installation where applicable.

The Company's equipment and system product line includes certain contracts which do

not

meet the requirements of an exchange transaction and therefore do

not

fall within the scope of ASC

606.

As these non-exchange transaction contracts are considered grant revenue and do

not

fall within any specific accounting literature, the Company follows guidance within ASC

606

by analogy to recognize grant revenue over time.

three

following criteria are met: when the customer receives the benefits as they are performed, control transfers to the customer as the work is performed, or there is

The Company enters into sales arrangements that

may

provide for multiple performance obligations to a customer. Sales of certain products

may

Performance obligations are separated into more than

one

unit of accounting when (

) the delivered element(s) have value to the customer on a stand-alone basis, and (

The Company reviews SSP and the related margins at least annually.

may

also agree to provide training services to transfer the technology know-how. In these arrangements, the Company has determined that the licenses have

standalone value to the customer and are

not

Existing customers are subject to ongoing credit evaluations based on payment history and other factors. If it is determined that collectability of any portion of the contract value is

not

generally provide for extended payment terms or provide its customers with a right of return.

The Company has elected to record taxes collected from customers on a net basis and does

not

include tax amounts in revenue or costs of revenue.

See Note

“Revenue Recognition,” for further information regarding the Company’s adoption of Accounting Standards Codification (“ASC”)

606,

Revenue from Contracts with Customers

Standard Product Warranty, Policy [Policy Text Block]

Product Warranty

Warranty obligations are incurred in connection with the sale of the Company’s products. The Company provides assurance-type warranties on all product sales for a term of typically

one

three

years, and extended service-type warranties at the customers’ option for an additional term ranging up to

four

Research and Development Expense, Policy [Policy Text Block]

Research and Development Costs

Research and development costs are expensed as incurred.

Income Tax, Policy [Policy Text Block]

Income Taxes

not

that these deferred tax assets are

not

currently realizable due to uncertainty around profitability in the future.

Accounting for income taxes requires a

two

-step approach to recognizing and measuring uncertain tax positions. The

first

step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than

not

that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The

second

step is to measure the tax benefit as the largest amount that is more than

50%

likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but

not

13,

“Income Taxes,” for further information regarding its income tax assumptions and expenses.

Share-based Payment Arrangement [Policy Text Block]

Stock-Based Compensation

The Company accounts for stock-based payment transactions using a fair value-based method and recognizes the related expense in the results of operations.

may

The Company accounts

for share-based payments made to non-employees

Earnings Per Share, Policy [Policy Text Block]

Computation of Net Income (Loss) per Common Share

March 31, 2020

and

2019

, common equivalent shares of

354,748,

and

907,988,

respectively, were

not

included in the calculation of diluted EPS as they were considered antidilutive. The following table

reconciles

the numerators and denominators of the EPS calculation for the fiscal years ended

March 31, 2020

and

2019

(in thousands except per share amounts):

	Fiscal year ended March 31,
	2020			2019
Numerator:
Net income (loss)	$	(17,096	)	$	26,761
Less: decrease in fair value of warrants, net of income tax		(4,648	)		—
Plus: change in fair value due to exercise of warrants		83			—
Net income (loss) - diluted	$	(21,662	)	$	26,761
Denominator:
Weighted-average shares of common stock outstanding		21,937			21,265
Weighted-average shares subject to repurchase		(953	)		(930	)
Shares used in per-share calculation ― basic		20,985			20,335
Common stock awards		—			391
Common stock warrants		84			—
Shares used in per-share calculation ― diluted		21,069			20,726
Net income (loss) per share ― basic	$	(0.81	)	$	1.32
Net income (loss) per share ― diluted	$	(1.03	)	$	1.29

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency Translation

0.1

million and

$1.6

million, for the fiscal years ended

March 31, 2020

and

2019

, respectively. The Company has

restrictions on the foreign exchange activities of its foreign subsidiaries, including the payment of dividends and other distributions.

Risks and Uncertainties [Policy Text Block]

Risks and Uncertainties

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates and would impact future results of operations and cash flows.

The Company invests its available cash in high credit, quality financial instruments and invests primarily in investment-grade marketable securities, including, but

not

limited to, government obligations, money market funds and corporate debt instruments.

March

31,

2021

and beyond as incremental funding is authorized and appropriated by the government.

Commitments and Contingencies, Policy [Policy Text Block]

Contingencies

From time to time, the Company

may

not

probable or cannot be reasonably estimated, a liability is

not

recorded in the consolidated financial statements. If, with respect to a matter, it is

not

recognize gain contingencies until they are realized. Legal costs incurred in connection with loss contingencies are expensed as incurred. See Note

16,

“Commitments and Contingencies,” for further information.

Fair Value of Financial Instruments, Policy [Policy Text Block]

Disclosure of Fair Value of Financial Instruments

March 31, 2020

and

2019

months that are measured using such inputs as quoted prices and are classified within Level

of the valuation hierarchy. The Company determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such classification as of each balance sheet date. All marketable securities are considered available for sale and are carried at fair value. Changes in fair value are recorded to other income (expense), net. The fair value for the warrant arrangements was historically estimated by management based on various assumptions in a lattice model and was subject to revaluation at each balance sheet date. The Company classifies the estimates used to fair value these instruments as Level

inputs. See Note

“Fair Value Measurements” for a full discussion on fair value measurements.

Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Property Plant and Equipment Useful Life [Table Text Block]

Asset Classification		Estimated Useful Life in Years
Machinery and equipment		3-10
Furniture and fixtures		3-5
Leasehold improvements		Shorter of the estimated useful life or the remaining lease term

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Fiscal year ended March 31,
	2020			2019
Numerator:
Net income (loss)	$	(17,096	)	$	26,761
Less: decrease in fair value of warrants, net of income tax		(4,648	)		—
Plus: change in fair value due to exercise of warrants		83			—
Net income (loss) - diluted	$	(21,662	)	$	26,761
Denominator:
Weighted-average shares of common stock outstanding		21,937			21,265
Weighted-average shares subject to repurchase		(953	)		(930	)
Shares used in per-share calculation ― basic		20,985			20,335
Common stock awards		—			391
Common stock warrants		84			—
Shares used in per-share calculation ― diluted		21,069			20,726
Net income (loss) per share ― basic	$	(0.81	)	$	1.32
Net income (loss) per share ― diluted	$	(1.03	)	$	1.29

Note 3 - Revenue Recognition (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Year Ended March 31, 2020
Product Line:	Grid		Wind
Equipment and systems	$	44,065	$	12,282
Services and technology development		5,520		1,971
Total	$	49,585	$	14,253

Region:
Americas	$	33,207	$	87
Asia Pacific		10,407		13,996
EMEA		5,971		170
Total	$	49,585	$	14,253

	Year Ended March 31, 2019
Product Line:	Grid		Wind
Equipment and systems	$	26,645	$	19,287
Services and technology development		7,645		2,630
Total	$	34,290	$	21,917

Region:
Americas	$	22,811	$	112
Asia Pacific		7,267		21,200
EMEA		4,212		605
Total	$	34,290	$	21,917

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2019	$	2,213		$	318		$	15,521
Increases for costs incurred to fulfill performance obligations		—			4,844			—
Increase (decrease) due to customer billings		(11,516	)		—			47,877
Decrease due to cost recognition on completed performance obligations		—			(3,525	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		15,017			—			(37,009	)
Other changes and FX impact		(3	)		(6	)		(247	)
Ending balance as of March 31, 2020	$	5,711		$	1,631		$	26,142

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2018	$	3,016		$	2,567		$	21,937
Impact of adoption of ASC 606		—			(1,599	)		(2,657	)
Increases for costs incurred to fulfill performance obligations		—			1,585			—
Increase (decrease) due to customer billings		(12,076	)		—			20,540
Decrease due to cost recognition on completed performance obligations		—			(2,212	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		11,324			(9	)		(23,084	)
Other changes and FX impact		(51	)		(14	)		(1,215	)
Ending balance as of March 31, 2019	$	2,213		$	318		$	15,521

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

		Year Ended
	Reportable	March 31,
	Segment	2020	2019
Department of Homeland Security	Grid	10%	<10%
Vestas	Grid	<10%	15%
Inox Wind Limited	Wind	<10%	34%

Note 5 - Fair Value Measurements (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2020:
Assets:
Cash equivalents	$	19,394	$	19,394	$	—	$	—
Marketable securities	$	35,195	$	35,195	$	—	$	—

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2019:
Assets:
Cash equivalents	$	41,839	$	41,839	$	—	$	—
Derivative liabilities:
Warrants	$	4,942	$	—	$	—	$	4,942

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

	Warrants
April 1, 2019	$	4,942
Mark to market adjustment		(4,648	)
Exercise of in-the-money warrants		(294	)
March 31, 2020	$	-

	Warrants
April 1, 2018	$	1,217
Mark to market adjustment		3,725
March 31, 2019	$	4,942

Note 6 - Accounts Receivable (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Accounts Receivable [Table Text Block]

	March 31, 2020		March 31, 2019
Accounts receivable (billed)	$	11,276	$	5,642
Accounts receivable (unbilled)		5,711		2,213
Accounts receivable	$	16,987	$	7,855

Note 7 - Inventory (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31, 2020		March 31, 2019
Raw materials	$	10,739	$	5,474
Work-in-process		1,345		1,922
Finished goods		5,260		4,405
Deferred program costs		1,631		318
Inventory	$	18,975	$	12,119

Note 8 - Note Receivable (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Notes Receivable [Table Text Block]

	March 31, 2019
Current assets
Note receivable, current	$	3,000
Note receivable discount		(112	)
Total current note receivable	$	2,888

Long term assets
Note receivable, long term	$	—
Note receivable discount		—
Deferred gain on sale		—
Total long term note receivable	$	—

Note 9 - Property, Plant and Equipment (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	March 31, 2020			March 31, 2019
Construction in progress - equipment	$	3,130		$	603
Equipment and software		41,737			45,705
Furniture and fixtures		1,302			1,269
Leasehold improvements		2,477			1,955
Property, plant and equipment, gross		48,646			49,532
Less accumulated depreciation		(40,081	)		(40,560	)
Property, plant and equipment, net	$	8,565		$	8,972

Note 10 - Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	2020							2019
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Core technology and know-how	$	5,970	$	(2,420	)	$	3,550	$	4,970	$	(2,080	)	$	2,890	5-10

	March 31,
	2020		2019
Intangible assets by geography:
U.S.	$	3,550	$	2,890
Total	$	3,550	$	2,890

	March 31,
	2020		2019
Intangible assets by business segments:
Grid	$	3,550	$	2,890
Total	$	3,550	$	2,890

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Fiscal years ending March 31,	Total
2021	$	483
2022		483
2023		483
2024		483
2025		483
Thereafter		1,135
Total	$	3,550

The geographic composition of intangible assets is as follows (in thousands):

Note 11 - Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	March 31, 2020		March 31, 2019
Accounts payable	$	10,045	$	2,939
Accrued inventories in-transit		763		244
Accrued other miscellaneous expenses		1,986		1,759
Advanced deposits		666		631
Accrued compensation		5,683		5,404
Income taxes payable		933		3,363
Accrued product warranty		2,015		1,545
Total	$	22,091	$	15,885

Schedule of Product Warranty Liability [Table Text Block]

	Fiscal Years Ended March 31,
	2020			2019
Balance at beginning of period	$	1,545		$	1,769
Change in accruals for warranties during the period		542			727
Settlements during the period		(72	)		(951	)
Balance at end of period	$	2,015		$	1,545

Note 12 - Warrants and Derivative Liabilities (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Fair Value Option, Disclosures [Table Text Block]

					September 30,		June 30,
Fiscal Year 2019					2019		2019
Risk-free interest rate						1.90%		2.11%
Expected annual dividend yield						—		—
Expected volatility						62.84%		60.58%
Term (years)						0.12		0.37
Fair value					$0.6 million		$1.7 million

	March 31,		December 31,		September 30,		June 30,		March 31,
Fiscal Year 2018	2019		2018		2018		2018		2018
Risk-free interest rate		2.43%		2.61%		2.62%		2.40%		2.20%
Expected annual dividend yield		—		—		—		—		—
Expected volatility		75.61%		70.29%		63.66%		67.40%		65.86%
Term (years)		0.62		0.87		1.12		1.37		1.62
Fair value	$4.6 million		$3.6 million		$1.3 million		$1.6 million		$1.1 million

Note 13 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Fiscal years ended March 31,
	2020			2019
Income/(Loss) before income tax expense:
U.S.	$	(18,260	)	$	(24,289	)
Foreign		1,359			57,430
Total	$	(16,901	)	$	33,141

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Fiscal years ended March 31,
	2020			2019
Current
Federal	$	1,814		$	1,246
Foreign		95			4,399
Total current		1,909			5,645

Deferred
Federal		(1,524	)		1,588
Foreign		(190	)		(853	)
Total deferred		(1,714	)		735

Income tax expense	$	195		$	6,380

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Fiscal years ended March 31,
	2020			2019
Statutory federal income tax rate		(21	)%		(21	)%
Foreign income tax rate differential		2			4
True-up of NOLs		1			(60	)
GILTI		1			37
Other		(6	)		3
Valuation allowance		24			92
Effective income tax rate		1	%		(19	)%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	March 31, 2020			March 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$	195,504		$	181,657
Research and development and other tax credit carryforwards		13,244			13,046
Accruals and reserves		5,352			14,781
Fixed assets and intangible assets		1,697			1,553
Other		1,565			2,785
Gross deferred tax assets		217,362			213,822
Valuation allowance		(199,989	)		(196,340	)
Total deferred tax assets		17,373			17,482

Deferred tax liabilities:
Intercompany Debt		(14,365	)		(16,028	)
Other		(1,637	)		(1,794	)
Total deferred tax liabilities		(16,002	)		(17,822	)
Net deferred tax asset	$	1,371		$	(340	)

Note 14 - Leases (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Assets And Liabilities Lessee [Table Text Block]

	March 31, 2020
Operating Leases:
Right-of-use assets	$	3,359
Total right-of-use assets		3,359

Lease liabilities - ST	$	439
Lease liabilities - LT		3,000
Total operating lease liabilities	$	3,439

Weighted-average remaining lease term	6.91 years
Weighted-average discount rate		7.08	%

Lease, Cost [Table Text Block]

	Year ended
	March 31, 2020
Operating Lease:
Operating lease costs - fixed	$	713
Operating lease costs - variable		100
Short-term lease costs		544
Total lease costs	$	1,357

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

	Operating Leases
Year ended March 31,
2021	$	665
2022		647
2023		621
2024		559
2025		501
Thereafter		1,394
Total minimum lease payments		4,387
Less: interest		(948	)
Present value of lease liabilities	$	3,439

Accounting Standards Update 2016-02 [Member]

Notes Tables

Accounting Standards Update and Change in Accounting Principle [Table Text Block]

	March 31, 2019		ASC 842 Adjustment		April 1, 2019
Operating Leases:
Right of use asset	$	—	$	3,795	$	3,795
Total operating lease right-of-use asset		—		3,795		3,795

Operating lease liabilities – ST	$	—	$	309	$	309
Operating lease liabilities – LT		—		3,512		3,512
Total operating lease liabilities		—		3,821		3,821

Weighted-average remaining lease term					7.69 years
Weighted-average discount rate						7.06	%

Note 15 - Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Share-based Payment Arrangement, Cost by Plan [Table Text Block]

	Fiscal years ended March 31,
	2020		2019
Stock options	$	16	$	221
Restricted stock and stock awards		1,870		2,781
Employee stock purchase plan		36		28
Total stock-based compensation expense	$	1,922	$	3,030

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Fiscal years ended March 31,
	2020		2019
Cost of revenues	$	66	$	116
Research and development		333		365
Selling, general and administrative		1,522		2,549
Total	$	1,922	$	3,030

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Options / Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value (thousands)
Outstanding at March 31, 2019		164,265		$	96.30
Granted		5,939			11
Canceled/forfeited		(29,923	)		296.62
Outstanding at March 31, 2020		140,281		$	49.95		2.91	$	—
Exercisable at March 31, 2020		134,342		$	51.68		2.9	$	—
Fully vested and expected to vest at March 31, 2020		140,061		$	50.01		2.63	$	—

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Fiscal years ended March 31,
	2020			2019
Expected volatility		66.5	%		N/A
Risk-free interest rate		1.8	%		N/A
Expected life (years)		5.91			N/A
Dividend yield	None				N/A

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	Shares			Weighted Average Grant Date Fair Value		Intrinsic Aggregate Value (thousands)
Outstanding at March 31, 2019		953,948		$	5.26
Granted		389,174			8.74
Vested		(332,375	)		6.21
Forfeited		(28,500	)		7.22
Outstanding at March 31, 2020		982,247		$	6.26	$	5,383

Note 18 - Restructuring (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Restructuring and Related Costs [Table Text Block]

	Severance pay and benefits			Facility exit and Relocation costs			Total
Accrued restructuring balance at April 1, 2018	$	262		$	173		$	435
Charges to operations		—			450			450
Cash payments		(262	)		(623	)		(885	)
Accrued restructuring balance at March 31, 2019	$	—		$	—		$	—

Note 19 - Business Segments (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Fiscal Years Ended March 31,
	2020		2019
Revenues:
Grid	$	49,585	$	34,290
Wind		14,253		21,917
Total	$	63,838	$	56,207

	Fiscal Years Ended March 31,
	2020			2019
Operating income (loss):
Grid	$	(13,508	)	$	(10,600	)
Wind		(7,699	)		48,103
Unallocated corporate expenses		(1,922	)		(3,480	)
Total	$	(23,129	)	$	34,023

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	March 31, 2020		March 31, 2019
Grid	$	44,044	$	31,075
Wind		14,250		8,167
Corporate assets		65,815		80,088
Total	$	124,109	$	119,330

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	March 31,
	2020		2019
North America	$	8,113	$	8,555
Europe		397		345
Asia Pacific		55		72
Total	$	8,565	$	8,972

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) $ / shares in Units, $ in Thousands, € in Millions							1 Months Ended	12 Months Ended
	Nov. 13, 2019 USD ($) $ / shares shares	May 23, 2019 USD ($)	Mar. 28, 2019 USD ($)	Jul. 04, 2018 USD ($)	Jul. 03, 2018 USD ($)	Feb. 01, 2018 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	May 29, 2020 EUR (€)	Dec. 27, 2018 USD ($)	Mar. 28, 2018 USD ($)	Nov. 13, 2014 $ / shares
Retained Earnings (Accumulated Deficit), Ending Balance								$ (978,635)	$ (961,539)
Cash, Cash Equivalents, and Marketable Securities								59,900
Net Cash Provided by (Used in) Operating Activities, Total								(16,497)	42,714
Gain (Loss) Related to Litigation Settlement, Total									52,698
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total
Proceeds from Warrant Exercises								$ 6,139
November 2014 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares	$ 7.81												$ 7.81
Proceeds from Warrant Exercises	$ 6,100
Class of Warrant or Right, Warrants Exercised (in shares) \| shares	786,000
Class of Warrant or Right, Warrants Expired (in shares) \| shares	32,181
Sinovel [Member]
Litigation Settlement, Amount Awarded from Other Party					$ 57,500
Litigation Settlement, Number of Installments					2
Proceeds from Legal Settlements				$ 32,500
Litigation Receivable											$ 25,000
Gain (Loss) Related to Litigation Settlement, Total									$ 52,700
64 Jackson, LLC [Member]
Purchase and Sale Agreement, Total Consideration						$ 23,000
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment						17,000
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total						$ 6,000
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment, Net												$ 16,900
Notes Receivable, Stated Interest Rate								1.96%				1.96%
Proceeds from Collection of Notes Receivable		$ 3,000	$ 3,000
Inox Wind Limited [Member]
Supply Agreement, Aggregate Value							$ 210,000
Supply Commitment, Extension Period (Year)							3 years
Inox Wind Limited [Member] \| Subsequent Event [Member]
Supply Commitment, Default, Letters of Credit to be Received \| €										€ 6
Certificates of Deposit [Member] \| Minimum [Member]
Debt Securities, Available-for-sale, Term (Month)								330 days
Certificates of Deposit [Member] \| Maximum [Member]
Debt Securities, Available-for-sale, Term (Month)								18 years

Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Inventory Valuation Reserves, Ending Balance	$ 1,300	$ 900
Asset Impairment Charges, Total	0	0
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	354,748	907,988
Foreign Currency Transaction Gain (Loss), before Tax, Total	$ 100	$ 1,600
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Fuji Bridex Pte Ltd [Member]
Concentration Risk, Percentage	25.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Department of Homeland Security [Member]
Concentration Risk, Percentage	18.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Doosan Heavy Industries Construction Co [Member]
Concentration Risk, Percentage	17.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Vestas [Member]
Concentration Risk, Percentage		21.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| RES System 3 LLC [Member]
Concentration Risk, Percentage		16.00%

Note 2 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details)	12 Months Ended
	Mar. 31, 2020
Machinery and Equipment [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	10 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	5 years
Leasehold Improvements [Member]
Property, plant and equipment, estimated useful life	Shorter of the estimated useful life or the remaining lease term

Note 2 - Summary of Significant Accounting Policies - Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income (loss)	$ (17,096)	$ 26,761
Less: decrease in fair value of warrants, net of income tax	(4,648)
Plus: change in fair value due to exercise of warrants	83
Net income (loss) - diluted	$ (21,662)	$ 26,761
Weighted-average shares of common stock outstanding (in shares)	21,937,000	21,265,000
Weighted-average shares subject to repurchase (in shares)	(953,000)	(930,000)
Shares used in per-share calculation ? basic (in shares)	20,985,000	20,335,000
Common stock awards (in shares)		391
Common stock warrants (in shares)	84,000
Shares used in per-share calculation ? diluted (in shares)	21,069,000	20,726,000
Net income (loss) per share ? basic (in dollars per share)	$ (0.81)	$ 1.32
Net income (loss) per share ? diluted (in dollars per share)	$ (1.03)	$ 1.29

Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	72.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| Non-US [Member]
Concentration Risk, Percentage	51.00%	74.00%
Minimum [Member]
Warranty Period (Year)	1 year
Contract with Customer, Payment Term (Day)	30 days
Maximum [Member]
Warranty Period (Year)	3 years
Extended Service Warranty, Term (Year)	4 years
Contract with Customer, Payment Term (Day)	60 days
Grant [Member]
Revenues, Total	$ 6,400	$ 0

Note 3 - Revenue Recognition 2 (Details Textual) $ in Thousands	Mar. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 61,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Amount	$ 8,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 \| Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	1 year 30 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 \| Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	5 years

Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 63,838	$ 56,207
Grid [Member]
Revenues	49,585	34,290
Grid [Member] \| Americas [Member]
Revenues	33,207	22,811
Grid [Member] \| Asia Pacific [Member]
Revenues	10,407	7,267
Grid [Member] \| EMEA [Member]
Revenues	5,971	4,212
Wind [Member]
Revenues	14,253	21,917
Wind [Member] \| Americas [Member]
Revenues	87	112
Wind [Member] \| Asia Pacific [Member]
Revenues	13,996	21,200
Wind [Member] \| EMEA [Member]
Revenues	170	605
Equipment and Systems [Member] \| Grid [Member]
Revenues	44,065	26,645
Equipment and Systems [Member] \| Wind [Member]
Revenues	12,282	19,287
Services and Technology Development [Member] \| Grid [Member]
Revenues	5,520	7,645
Services and Technology Development [Member] \| Wind [Member]
Revenues	$ 1,971	$ 2,630

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Unbilled AR, beginning balance	$ 2,213	$ 3,016
Deferred Program Costs, beginning balance	318	2,567
Contract Liabilities, beginning balance	15,521	21,937
Deferred Program Costs, increases for costs incurred to fulfill performance obligations	4,844	1,585
Unbilled AR, increase (decrease) due to customer billings	(11,516)	(12,076)
Increase (decrease) due to customer billings	47,877	20,540
Unbilled AR,Decrease due to cost recognition on completed performance obligations
Deferred Program Costs, decrease due to cost recognition on completed performance obligations	(3,525)	(2,212)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	15,017	11,324
Deferred Program Costs, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		(9)
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(37,009)	(23,084)
Unbilled AR, other changes and FX impact	(3)	(51)
Deferred Program Costs, other changes and FX impact	(6)	(14)
Other changes and FX impact	(247)	(1,215)
Unbilled AR, Impact of adoption of ASC 606
Deferred Program Costs, Impact of adoption of ASC 606		(1,599)
Contract Liabilities, Impact of adoption of ASC 606		(2,657)
Unbilled AR, ending balance	5,711	2,213
Deferred Program Costs, ending balance	1,631	318
Contract Liabilities, ending balance	$ 26,142	$ 15,521

Note 3 - Revenue Recognition - Revenues By Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Department of Homeland Security [Member] \| Grid [Member]
Concentration risk percentage	10.00%	10.00%
Vestas WTG Mexico [Member] \| Grid [Member]
Concentration risk percentage	10.00%	15.00%
Inox Wind Limited [Member] \| Wind [Member]
Concentration risk percentage	10.00%	34.00%

Note 4 - Goodwill (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Goodwill, Impairment Loss	$ 0	$ 0	$ 0

Note 5 - Fair Value Measurements (Details Textual) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Unrealized Gain (Loss) on Securities	$ 100	$ 0
Class of Warrant or Right, Outstanding (in shares)	0

Note 5 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Derivative liabilities		$ 4,942
Reported Value Measurement [Member] \| Fair Value, Recurring [Member]
Cash equivalents	19,394	41,839
Marketable securities	35,195
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Warrant [Member]
Derivative liabilities		4,942
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	19,394	41,839
Marketable securities	35,195
Derivative liabilities		0
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0
Marketable securities
Derivative liabilities		0
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0
Marketable securities
Derivative liabilities		$ 4,942

Note 5 - Fair Value Measurements - Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Beginning balance	$ 4,942	$ 1,217
Mark to market adjustment		3,725
March 31, 2020	0	4,942
Warrant Liability [Member]
Beginning balance	4,942
Mark to market adjustment	(4,648)
Exercise of in-the-money warrants	$ (294)
March 31, 2020		$ 4,942

Note 6 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Accounts receivable (billed)	$ 11,276	$ 5,642
Accounts receivable (unbilled)	5,711	2,213
Accounts receivable	$ 16,987	$ 7,855

Note 7 - Inventory (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Inventory Write-down	$ 1,276	$ 878

Note 7 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Raw materials	$ 10,739	$ 5,474
Work-in-process	1,345	1,922
Finished goods	5,260	4,405
Deferred program costs	1,631	318
Inventory	$ 18,975	$ 12,119

Note 8 - Note Receivable (Details Textual) $ in Millions		12 Months Ended
Note 8 - Note Receivable (Details Textual) $ in Millions	Feb. 01, 2018 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Mar. 28, 2018
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total
Notes and Loans Receivable, Noncurrent Portion of Unamortized Debt Discount
Deferred Gain on Sale of Property
64 Jackson, LLC [Member]
Purchase and Sale Agreement, Total Consideration	$ 23.0
Security Deposit	1.0
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total	6.0
Notes and Loans Receivable, Number of Installments		2
Notes and Loans Receivable, Installment Amount		$ 3.0
Notes Receivable, Stated Interest Rate		1.96%			1.96%
Notes Receivable, Fair Value Disclosure		$ 5.7
Note Receivable Discount Rate		6.00%
Notes and Loans Receivable, Noncurrent Portion of Unamortized Debt Discount	$ 0.3	$ 0.1
Deferred Gain on Sale of Property				$ 0.1

Note 8 - Note Receivable - Summary of Note Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Note receivable, current		$ 3,000
Note receivable discount		(112)
Total current note receivable		2,888
Note receivable, long term
Note receivable discount
Deferred gain on sale
Total long term note receivable

Note 9 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Depreciation, Depletion and Amortization, Total	$ 4.0	$ 4.3

Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Property, plant and equipment, gross	$ 48,646	$ 49,532
Less accumulated depreciation	(40,081)	(40,560)
Property, plant and equipment, net	8,565	8,972
Construction in Progress [Member]
Property, plant and equipment, gross	3,130	603
Equipment and Software [Member]
Property, plant and equipment, gross	41,737	45,705
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,302	1,269
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 2,477	$ 1,955

Note 10 - Intangible Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Amortization of Intangible Assets, Total	$ 0.3	$ 0.3

Note 10 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Book Value	$ 3,550	$ 2,890
Grid [Member]
Net Book Value	3,550	2,890
UNITED STATES
Net Book Value	3,550	2,890
Core Technology and Know-how [Member]
Gross Amount	5,970	4,970
Accumulated Amortization	(2,420)	(2,080)
Net Book Value	$ 3,550	$ 2,890
Core Technology and Know-how [Member] \| Minimum [Member]
Estimated Useful Life (Year)	5 years
Core Technology and Know-how [Member] \| Maximum [Member]
Estimated Useful Life (Year)	10 years

Note 10 - Intangible Assets - Expected Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
2021	$ 483
2022	483
2023	483
2024	483
2025	483
Thereafter	1,135
Total	$ 3,550	$ 2,890

Note 11 - Accounts Payable and Accrued Expenses (Details Textual)	12 Months Ended
	Mar. 31, 2020
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Accounts payable	$ 10,045	$ 2,939
Accrued inventories in-transit	763	244
Accrued other miscellaneous expenses	1,986	1,759
Advanced deposits	666	631
Accrued compensation	5,683	5,404
Income taxes payable	933	3,363
Accrued product warranty	2,015	1,545
Total	$ 22,091	$ 15,885

Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance at beginning of period	$ 1,545	$ 1,769
Change in accruals for warranties during the period	542	727
Settlements during the period	(72)	(951)
Balance at end of period	$ 2,015	$ 1,545

Note 12 - Warrants and Derivative Liabilities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Nov. 13, 2019	Apr. 17, 2019	Dec. 19, 2014	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Nov. 13, 2014
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants				$ 4,648	$ (3,725)
Class of Warrant or Right, Outstanding (in shares)				0
Hercules Warrants [Member]
Gain (Loss) on Decrease Fair Value Upon Exercise of Warrant				$ 100	(200)
November 2014 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 7.81						$ 7.81
Common Unit, Issued (in shares)							909,090
Common Shares Per Unit (in shares)							1
Class of Warrant or Right, Number of Warrants to Purchase One Share of Stock (in shares)							0.9
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)							818,181
Class of Warrant or Right, Warrants Exercised (in shares)	786,000
Class of Warrant or Right, Warrants Expired (in shares)	32,181
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants				$ 4,600	3,500
Hercules Technology Growth Capital [Member]
Stock Issued During Period, Shares, Warrant Exercised (in shares)		22,821
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| First Warrant [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock (in shares)				13,927
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| Second Warrant [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock (in shares)				25,641
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| Hercules Warrants [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock (in shares)			58,823
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 7.85
Derivative, Fair Value, Net, Total					$ 400	$ 100

Note 12 - Warrants and Derivative Liabilities - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Fair value	$ 0.6	$ 1.7	$ 4.6	$ 3.6	$ 1.3	$ 1.6	$ 1.1
Fair value	$ 0.6	$ 1.7	$ 4.6	$ 3.6	$ 1.3	$ 1.6	$ 1.1
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.019	0.0211	2.43	2.61	2.62	2.4	2.2
Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.6284	0.6058	75.61	70.29	63.66	67.4	65.86
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	0.12	0.37	0.62	0.87	1.12	1.37	1.62

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred Tax Assets, Valuation Allowance, Total	$ 199,989	$ 196,340
Operating Loss Carryforwards Indefinite	54,000
Undistributed Earnings of Foreign Subsidiaries	1,900
Deferred Tax Liabilities, Undistributed Foreign Earnings	200
Liability for Uncertainty in Income Taxes, Current	0
Unrecognized Tax Benefits, Ending Balance	0	$ 0
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	10,100
Other Tax Credit Carryforwards [Member]
Tax Credit Carryforward, Amount	3,500
Power Quality Systems, Inc [Member]
Operating Loss Carryforwards, Total	3,700
Infinia Technology Corporation (ITC) [Member]
Operating Loss Carryforwards, Total	300
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	799,200
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	203,600
Foreign Tax Authority [Member] \| State Administration of Taxation, China [Member]
Operating Loss Carryforwards, Total	$ 56,000

Note 13 - Income Taxes - Income (Loss) Before Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
U.S.	$ (18,260)	$ (24,289)
Foreign	1,359	57,430
Total	$ (16,901)	$ 33,141

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Note 13 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Federal	$ 1,814	$ 1,246
Foreign	95	4,399
Total current	1,909	5,645
Federal	(1,524)	1,588
Foreign	(190)	(853)
Total deferred	(1,714)	735
Income tax expense	$ 195	$ 6,380

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Note 13 - Income Taxes - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statutory federal income tax rate	(21.00%)	(21.00%)
Foreign income tax rate differential	2.00%	4.00%
True-up of NOLs	1.00%	(60.00%)
GILTI	1.00%	37.00%
Other	(6.00%)	3.00%
Valuation allowance	24.00%	92.00%
Effective income tax rate	1.00%	(19.00%)

Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Net operating loss carryforwards	$ 195,504	$ 181,657
Research and development and other tax credit carryforwards	13,244	13,046
Accruals and reserves	5,352	14,781
Fixed assets and intangible assets	1,697	1,553
Other	1,565	2,785
Gross deferred tax assets	217,362	213,822
Valuation allowance	(199,989)	(196,340)
Total deferred tax assets	17,373	17,482
Intercompany Debt	(14,365)	(16,028)
Other	(1,637)	(1,794)
Total deferred tax liabilities	(16,002)	(17,822)
Net deferred tax liabilities	$ 1,371
Net deferred tax asset		$ (340)

Note 14 - Leases (Details Textual) - USD ($) $ in Thousands	Apr. 01, 2019	Mar. 31, 2020	Mar. 31, 2019
Operating Lease, Right-of-Use Asset	$ 3,795	$ 3,359
Operating Lease, Liability, Total	3,821	$ 3,439
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)		5 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset	3,800		3,795
Operating Lease, Liability, Total	3,800		$ 3,821
Operating Lease, Impairment Loss	$ 0

Note 14 - Leases - Adoption of ASC 842 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Apr. 01, 2019	Mar. 31, 2019
Right of use asset	$ 3,359	$ 3,795
Operating lease liabilities – ST	439	309
Operating lease liabilities – LT	3,000	3,512
Total operating lease liabilities	$ 3,439	$ 3,821
Weighted-average remaining lease term (Year)	6 years 332 days	7 years 251 days
Weighted-average discount rate	7.08%	7.06%
Accounting Standards Update 2016-02 [Member]
Right of use asset		$ 3,800	3,795
Operating lease liabilities – ST			309
Operating lease liabilities – LT			3,512
Total operating lease liabilities		$ 3,800	3,821
Previous Accounting Guidance [Member]
Right of use asset
Operating lease liabilities – ST
Operating lease liabilities – LT
Total operating lease liabilities

Note 14 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Apr. 01, 2019
Right of use asset	$ 3,359	$ 3,795
Operating lease liabilities – ST	439	309
Operating lease liabilities – LT	3,000	3,512
Total operating lease liabilities	$ 3,439	$ 3,821
Weighted-average remaining lease term (Year)	6 years 332 days	7 years 251 days
Weighted-average discount rate	7.08%	7.06%

Note 14 - Leases - Lease Cost (Details) $ in Thousands	12 Months Ended
Note 14 - Leases - Lease Cost (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Operating lease costs - fixed	$ 713
Operating lease costs - variable	100
Short-term lease costs	544
Total lease costs	$ 1,357

Note 14 - Leases - Minimum Future Lease Obligation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Apr. 01, 2019
2021	$ 665
2022	647
2023	621
2024	559
2025	501
Thereafter	1,394
Total minimum lease payments	4,387
Less: interest	(948)
Total operating lease liabilities	$ 3,439	$ 3,821

Note 15 - Stockholders' Equity (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Aug. 01, 2019	Jul. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	5,939	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		389,174
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)		28,500
Share-based Payment Arrangement, Expense		$ 1,922,000	$ 3,030,000
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 73 days
Share-based Payment Arrangement, Expense		$ 16,000	221,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value		3,400,000	3,600,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 3,400,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 2,900,000	2,600,000
Share-based Payment Arrangement, Expense		$ 1,870,000	2,781,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			$ 28,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		94,500	57,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)			28,500
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				4,600,000	3,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		1,249,930
The 2007 Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)		10 years
The 2007 Plan [Member] \| Share-based Payment Arrangement, Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		3 years
The 2007 Plan [Member] \| Share-based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		5 years
The 2007 Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		3 years
The 2007 Director Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				280,000	230,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		2 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Fair Value		$ 40,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value		$ 40,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		108,474
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 100,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		203,134
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date			15.00%
Employee Stock Purchase Plan [Member] \| Maximum [Member]
Share-based Payment Arrangement, Expense		$ 100,000	$ 100,000

Note 15 - Stockholders' Equity - Components of Employee Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock-based compensation expense	$ 1,922	$ 3,030
Share-based Payment Arrangement, Option [Member]
Stock-based compensation expense	16	221
Restricted Stock [Member]
Stock-based compensation expense	1,870	2,781
Awards by Employee Stock Purchase Plan [Member]
Stock-based compensation expense	$ 36	$ 28

Note 15 - Stockholders' Equity - Summarizes Employee Stock-based Compensation Expense by Financial Statement Line Item (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock-based compensation expense	$ 1,922	$ 3,030
Cost of Sales [Member]
Stock-based compensation expense	66	116
Research and Development Expense [Member]
Stock-based compensation expense	333	365
Selling, General and Administrative Expenses [Member]
Stock-based compensation expense	$ 1,522	$ 2,549

Note 15 - Stockholders' Equity - Options Activities (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Outstanding, options (in shares)		164,265
Outstanding, weighted-average exercise price (in dollars per share)		$ 96.30
Outstanding, aggregate intrinsic value
Granted (in shares)	0	5,939	0
Granted (in dollars per share)		$ 11
Canceled/forfeited, options (in shares)		(29,923)
Canceled/forfeited, weighted-average exercise price (in dollars per share)		$ 296.62
Outstanding, options (in shares)	164,265	140,281	164,265
Outstanding, weighted-average exercise price (in dollars per share)	$ 96.30	$ 49.95	$ 96.30
Outstanding, weighted-average remaining contractual term (Year)		2 years 332 days
Exercisable, options (in shares)		134,342
Exercisable, weighted-average exercise price (in dollars per share)		$ 51.68
Exercisable, weighted-average remaining contractual term (Year)		2 years 328 days
Fully vested and expected to vest, options (in shares)		140,061
Fully vested and expected to vest, weighted-average exercise price (in dollars per share)		$ 50.01
Fully vested and expected to vest, weighted-average remaining contractual term (Year)		2 years 229 days
Fully vested and expected to vest, aggregate intrinsic value

Note 15 - Stockholders' Equity - Stock Options Granted (Details)	12 Months Ended
	Mar. 31, 2020
Expected volatility	66.50%
Risk-free interest rate	1.80%
Expected life (years) (Year)	5 years 332 days

Note 15 - Stockholders' Equity - Restricted Stock Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Outstanding, restricted stock (in shares) \| shares	953,948
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 5.26
Granted, restricted stock (in shares) \| shares	389,174
Granted, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 8.74
Vested, restricted stock (in shares) \| shares	(332,375)
Vested, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 6.21
Forfeited, restricted stock (in shares) \| shares	(28,500)
Forfeited, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 7.22
Outstanding, restricted stock (in shares) \| shares	982,247
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 6.26
Outstanding, restricted stock, intrinsic aggregate value \| $	$ 5,383

Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Jul. 01, 2019
Operating Leases, Rent Expense, Net, Total	$ 1,300
Restricted Cash and Cash Equivalents, Noncurrent, Total	$ 715	$ 5,657
Preconfirmation, Restricted Cash and Cash Equivalents, Current		$ 500
Letter of Credit [Member]
Escrow Deposit			$ 5,000

Note 17 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Contribution Plan, Company Contribution, Percentage Match Common Stock	50.00%
Defined Contribution Plan, Percentage of First Eligible Employee Contribution Matched by Employer	6.00%
Defined Contribution Plan, Cost	$ 0.3	$ 0.3

Note 18 - Restructuring (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Charges, Total		$ 450

Note 18 - Restructuring - Restructuring Charges and Cash Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accrued restructuring balance, beginning		$ 435
Restructuring Charges, Total		450
Cash payments		(885)
Accrued restructuring balance, ending
Employee Severance Pay and Benefits [Member]
Accrued restructuring balance, beginning		262
Restructuring Charges, Total
Cash payments		(262)
Accrued restructuring balance, ending
Facility Exit and Relocation Costs [Member]
Accrued restructuring balance, beginning		173
Restructuring Charges, Total		450
Cash payments		(623)
Accrued restructuring balance, ending

Note 19 - Business Segments (Details Textual) $ in Thousands	12 Months Ended
	Mar. 31, 2020 USD ($) Boe	Mar. 31, 2019 USD ($)
Number of Reportable Segments	2
Share-based Payment Arrangement, Expense	$ 1,922	$ 3,030
Restructuring Charges, Total		450
Corporate, Non-Segment [Member]
Share-based Payment Arrangement, Expense	$ 1,900	3,000
Restructuring Charges, Total		$ 500
Minimum [Member]
Number of Reportable Segments (Barrel of Oil Equivalent) \| Boe	2

Note 19 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 63,838	$ 56,207
Operating profit (loss)	(23,129)	34,023
Corporate, Non-Segment [Member]
Operating profit (loss)	(1,922)	(3,480)
Grid [Member]
Revenues	49,585	34,290
Grid [Member] \| Operating Segments [Member]
Operating profit (loss)	(13,508)	(10,600)
Wind [Member]
Revenues	14,253	21,917
Wind [Member] \| Operating Segments [Member]
Operating profit (loss)	$ (7,699)	$ 48,103

- Definition

+ References

+ Details

Note 19 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Total assets	$ 124,109	$ 119,330
Operating Segments [Member] \| Grid [Member]
Total assets	44,044	31,075
Operating Segments [Member] \| Wind [Member]
Total assets	14,250	8,167
Corporate, Non-Segment [Member]
Total assets	$ 65,815	$ 80,088

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

+ Details

Note 19 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment, Net	$ 8,565	$ 8,972
North America [Member]
Property, Plant and Equipment, Net	8,113	8,555
Europe [Member]
Property, Plant and Equipment, Net	397	345
Asia Pacific [Member]
Property, Plant and Equipment, Net	$ 55	$ 72