Document And Entity Information - USD ($) $ in Millions	12 Months Ended
Document And Entity Information - USD ($) $ in Millions	Mar. 31, 2019	May 30, 2019	Sep. 28, 2018
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	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 Common Stock, Shares Outstanding (in shares)		21,449,546
Entity Public Float			$ 143.3
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Current assets:
Cash and cash equivalents	$ 77,483	$ 34,084
Accounts receivable, net	7,855	7,365
Inventory	12,119	19,780
Notes receivable, current portion	2,888	3,000
Prepaid expenses and other current assets	3,053	2,947
Total current assets	103,398	67,176
Property, plant and equipment, net	8,972	12,513
Intangibles, net	2,890	3,230
Note receivable, long term portion		2,559
Goodwill recognized	1,719	1,719
Restricted cash	715	165
Deferred tax assets	1,357	542
Other assets	279	271
Total assets	119,330	88,175
Current liabilities:
Accounts payable and accrued expenses	15,885	12,625
Derivative liabilities	4,942	1,217
Deferred revenue, current portion	7,557	13,483
Total current liabilities	28,384	27,325
Deferred revenue, long term portion	7,962	8,454
Deferred tax liabilities	1,698	110
Other liabilities	93	57
Total liabilities	38,137	35,946
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock, $0.01 par value, 75,000,000 shares authorized; 21,651,631 and 21,138,689 shares issued at March 31, 2019 and 2018, respectively	216	211
Additional paid-in capital	1,044,622	1,041,113
Treasury stock, at cost, 235,518 and 165,094 shares at March 31, 2019 and 2018, respectively	(2,101)	(1,645)
Accumulated other comprehensive (loss) income	(5)	883
Accumulated deficit	(961,539)	(988,333)
Total stockholders' equity	81,193	52,229
Total liabilities and stockholders' equity	$ 119,330	$ 88,175

Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2019	Mar. 31, 2018
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)	21,651,631	21,138,689
Treasury stock, shares (in shares)	235,518	165,094

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues	$ 56,207	$ 48,403
Cost of revenues	42,190	44,608
Gross profit	14,017	3,795
Operating expenses:
Research and development	9,874	11,594
Selling, general and administrative	22,028	22,577
Gain on Sinovel settlement	(52,698)
Amortization of acquisition related intangibles	340	183
Loss on contingent consideration		71
Restructuring Charges, Total	450	1,527
Total operating expenses	(20,006)	35,952
Operating income (loss)	34,023	(32,157)
Change in fair value of derivatives and warrants	(3,725)	706
Gain on sale of minority interests	127	1,167
Interest income (expense), net	1,117	147
Other income (expense), net	1,599	(2,800)
Income (loss) before income tax expense (benefit)	33,141	(32,937)
Income tax expense (benefit)	6,380	(161)
Net income (loss)	$ 26,761	$ (32,776)
Net income (loss) per common share
Basic (in dollars per share)	$ 1.32	$ (1.73)
Diluted (in dollars per share)	$ 1.29	$ (1.73)
Weighted average number of common shares outstanding
Basic (in shares)	20,335	18,967
Diluted (in shares)	20,726	18,967

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ 26,761	$ (32,776)
Other comprehensive (loss) gain, net of tax:
Foreign currency translation (losses) gains	(888)	1,386
Total other comprehensive (loss) gain, net of tax	(888)	1,386
Comprehensive income (loss)	$ 25,873	$ (31,390)

- Definition

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

+ References + Details

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ 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, 2017	14,714
Balance at Mar. 31, 2017	$ 147	$ 1,017,510	$ (1,371)	$ (503)	$ (955,557)	$ 60,226
Issuance of common stock - ESPP (in shares)	40
Issuance of common stock - ESPP		174				174
Issuance of common stock - restricted shares (in shares)	819
Issuance of common stock - restricted shares	$ 8	(8)
Stock-based compensation expense		2,692				2,692
Issuance of stock for 401(k) match (in shares)	81
Issuance of stock for 401(k) match	$ 1	350				351
Issuance of common stock-equity offering (in shares)	4,600
Issuance of common stock-equity offering	$ 46	16,906				16,952
Issuance of stock in business acquisition (in shares)	885
Issuance of stock in business acquisition	$ 9	3,489				3,498
Repurchase of treasury stock			(274)			(274)
Cumulative translation adjustment				1,386		1,386
Net income (loss)					(32,776)	(32,776)
Balance (in shares) at Mar. 31, 2018	21,139
Balance at Mar. 31, 2018	$ 211	1,041,113	(1,645)	883	(988,333)	52,229
Issuance of common stock - ESPP (in shares)	20
Issuance of common stock - ESPP		157				157
Issuance of common stock - restricted shares (in shares)	451
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
Issuance of stock for 401(k) match	$ 1	326				327
Repurchase of treasury stock			(456)			(456)
Cumulative translation adjustment				(888)		(888)
Net income (loss)					26,761	26,761
Balance (in shares) at Mar. 31, 2019	21,652
Balance at Mar. 31, 2019	$ 216	1,044,622	(2,101)	(5)	(961,539)	81,193
Cumulative impact of adoption of ASU No. 2014-09					$ 33	$ 33

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ 26,761	$ (32,776)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Depreciation and amortization	4,609	11,459
Stock-based compensation expense	3,030	2,692
Provision for excess and obsolete inventory	878	434
Recovery of prepaid taxes		(82)
Gain on sale from minority interest investments	(127)	(1,167)
Change in fair value of warrants and contingent consideration	3,725	(635)
Non-cash interest (income) expense	(224)	19
Other non-cash items	(117)	793
Changes in operating asset and liability accounts:
Accounts receivable	(529)	1,145
Inventory	5,007	(2,423)
Prepaid expenses and other current assets	(365)	558
Accounts payable and accrued expenses	2,839	(2,956)
Deferred revenue	(2,773)	(1,888)
Net cash provided by (used in) operating activities	42,714	(24,827)
Cash flows from investing activities:
Purchase of property, plant and equipment	(952)	(2,534)
Proceeds from the sale of property, plant and equipment	3,138	16,910
Cash paid for acquisition, net of cash received		74
Proceeds from sale of minority interests	127	1,167
Change in other assets	(144)	(15)
Net cash provided by investing activities	2,169	15,602
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(456)	(274)
Repayment of debt		(1,575)
Proceeds from public equity offering, net		16,952
Proceeds from exercise of employee stock options and ESPP	157	175
Net cash provided by (used in) financing activities	(299)	15,278
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(635)	452
Net increase in cash, cash equivalents and restricted cash	43,949	6,505
Cash, cash equivalents and restricted cash at beginning of year	34,249	27,744
Cash, cash equivalents and restricted cash at end of year	78,198	34,249
Supplemental schedule of cash flow information:
Issuance of common stock in connection with the purchase of Infinia Technology Corporation		3,498
Cash paid for income taxes, net of refunds	2,859	1,576
Issuance of common stock to settle liabilities	457	350
Deferred gain on sale of 64 Jackson Road building		105
Cash paid for interest		$ 42

Note 1 - Nature of the Business and Operations and Liquidity	12 Months Ended
	Mar. 31, 2019
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, although the Company generated net income of $26.8 million in the fiscal year ended March 31, 2019, and as of March 31, 2019, the Company had an accumulated deficit of $961.5 million. In addition, although the Company generated positive operating cash flow in fiscal 2018, the Company has historically experienced recurring negative operating cash flows. At March 31, 2019, the Company had cash, cash equivalents and restricted cash of $78.2 million. Cash provided by operations for the year ended March 31, 2019 was $42.7 m illion. 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. 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. 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, 2019. 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. 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, 2019

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, valuation of warrant and derivative liabilities, 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.

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, 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. As of

March

31,

2018,

Inox accounted for approximately

32%

and Fuji Bridex Pte Ltd for approximately

17%

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,

2019

and

2018,

the Company recorded inventory reserves of approximately

$0.9

million and

$0.4

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

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
Building		40
Process upgrades to the building		10-40
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, 2019

and

2018.

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’s goodwill exceeds its implied fair value, then an impairment loss equal to the difference is recorded. See Note

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

The Company performed its annual assessment of goodwill on

February 28, 2019

and noted

triggering events from the analysis date to

March 31, 2019

and determined that there was

impairment to goodwill. Additionally, there was

impairment identified for the fiscal year ended

March 31, 2018

based on the assessment performed in prior year.

Equity Method Investments

The Company uses the equity method of accounting for investments in entities in which it has an ownership interest, but does

not

exercise a controlling interest in the operating and financial policies of an investee. Under this method, an investment is carried at the acquisition cost, plus the Company’s equity in undistributed earnings or losses since acquisition.

The Company periodically tests its investments for potential impairment whenever events and circumstances indicate a loss in the fair value of the investments

may

be other than temporary. There were

minority investments as of

March

31,

2019

and

2018.

Revenue Recognition

April 1, 2018,

the Company adopted ASC

606,

Revenue from Contracts with Customers

using the modified retrospective method, therefore prior period amounts have

not

been restated and continue to be reported under the accounting standards in effect for those periods.

The adoption of this guidance has led to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time, specifically in the technology product line.

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 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.

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.

Infrequently, the Company receives requests from customers to hold product being purchased from us for a valid business purpose. The Company recognizes revenues for such arrangements provided the transaction meets, at a minimum, the following criteria: a valid business purpose for the arrangement exists; risk of ownership of the purchased product has been transferred to the buyer; there is a fixed delivery date that is reasonable and consistent with the buyer’s business purpose; the product is ready for shipment; the Company has

continuing performance obligation in regards to the purchased product and these products have been segregated from our inventories and cannot be used to fill other orders received. There were

such transactions in revenue for the fiscal year ended

March 31, 2019.

For the fiscal year ended

March

31,

2018,

such transactions recognized as revenue were

$3.7

million.

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 generally provides a

one

three

year warranty on its products, commencing upon installation. 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.

December 22, 2017,

the Tax Cuts and Jobs Act of

2017

(the "Act") was signed into law making significant changes to the Internal Revenue Code. Changes include, but are

not

limited to, a corporate tax rate decrease from

34%

21%

effective for tax years beginning after

December 31, 2017

and a

one

-time mandatory deemed repatriation of cumulative foreign earnings. 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's adoption of ASU

2018

Compensation - Stock Compensation (Topic

718

): Improvements to Non-Employee Share Based Payment Accounting

April 1,

201

also resulted in

the acc

ounting for share-based payments made to non-employees

to be accounted for 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,

2019

and

2018,

common equivalent shares of

907,988,

and

1,157,895,

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,

2019

and

2018

(in thousands except per share amounts):

	Fiscal year ended March 31,
	2019			2018
Numerator:
Net income (loss)	$	26,761		$	(32,776	)
Denominator:
Weighted-average shares of common stock outstanding		21,265			19,621
Weighted-average shares subject to repurchase		(930	)		(654	)
Shares used in per-share calculation — basic		20,335			18,967
Shares used in per-share calculation — diluted		20,726			18,967
Net income (loss) per share — basic	$	1.32		$	(1.73	)
Net income (loss) per share — diluted	$	1.29		$	(1.73	)

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 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 statement of operations and were

$1.6

million and (

$2.8

) million, for the fiscal years ended

March

31,

2019

and

2018,

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,

2020

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

15,

“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, accounts payable, accrued expenses, warrants to purchase shares of common stock, derivatives, and a senior secured term loan. 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,

2019

and

2018.

The estimated fair values have been determined through information obtained from market sources and management estimates. The fair value for the warrant arrangements has been estimated by management based on various assumptions in a lattice model and are 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, 2019

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

Revenue Recognition

April 1, 2018,

the Company adopted ASC

606,

Revenue from Contracts with Customers,

and all the related amendments and applied it to all contracts that were

not

completed as of

April 1, 2018

using the modified retrospective method. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment of less than

$0.1

million to the opening balance of accumulated deficit. Prior period amounts have

not

been restated and continue to be reported under the accounting standards in effect for those periods.

not

expect a material impact to its consolidated statements of operations on an ongoing basis from the adoption of the new standard.

In addition, the FASB issued Accounting Standards Update (“ASU”)

2017

05,

Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic

610

)

, in

February 2017,

to amend ASC

610

20,

Other Income - Gains and Losses from the Derecognition of Non-financial Assets

(issued at the same time as ASC

606

), which provides a model for the measurement and recognition of gains and losses on the sale of non-financial assets, such as property and equipment, including real estate. As a result of adopting ASU

2017

April 1, 2018,

the Company recognized an adjustment to the opening balance of accumulated deficit for the deferred gain from the

March 28, 2018

sale of the Company's former headquarters in Devens, Massachusetts in the amount of

$0.1

million.

The cumulative effect to the Company’s consolidated

April 1, 2018

balance sheet from the adoption of the new revenue standard and the sale of nonfinancial assets was as follows (in thousands):

	March 31, 2018			Opening Adjustment			April 1, 2018
Assets:
Accounts Receivable	$	7,365		$	(678	)	$	6,687
Inventory		19,780			(1,599	)		18,181
Prepaid expenses and other current assets		2,947			2,277			5,224
Notes receivable, long term portion		2,559			105			2,664

Liabilities and Stockholders' Equity:
Accounts payable and accrued expenses	$	(12,625	)	$	(2,729	)	$	(15,354	)
Deferred revenue		(13,483	)		2,657			(10,826	)

Accumulated deficit	$	(988,333	)	$	(33	)	$	(988,366	)

Included in the opening adjustment are reclassifications for accounts receivable, deferred program costs and deferred revenue for previous balances related to agreements that

longer meet the definition of a customer contract under ASC

606.

The impact of adoption on the Company’s opening balances and for the fiscal year ended

March 31, 2019,

in all financial statement line items impacted by ASC

606

was immaterial from the amount that would have been reported under the previous guidance.

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, 2019,

85%

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.

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

two

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 services.

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, 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,

2019

and

2018,

74%

and

64%

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, 2019

and

March

31,

2018,

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 “Deferred 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, 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, 2019,

the Company had outstanding performance obligations on existing contracts under ASC

606

to be recognized in the next

twelve

months of approximately

$47.5

million. There are also approximately

$11.6

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.

The following table sets forth customers who represented

10%

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

March 31, 2019

and

2018:

		Year Ended
	Reportable	March 31,
	Segment	2019	2018
Inox Wind Limited	Wind	34%	27%
Vestas	Grid	15%	<10%

Note 4 - Acquisition and Related Goodwill

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Business Combination Disclosure [Text Block]

Acquisition and Related Goodwill

Acquisition of Infinia Technology Corporation

September

25,

2017,

the Company acquired Infinia Technology Corporation ("ITC") for approximately

$3.8

million (the “Acquisition”). Located in Richmond, Washington, ITC is a technology firm founded in

2009

specializing in the design, development and commercialization of cryo-coolers for a wide range of applications. This technology supports the Company's efforts with the U.S. Navy and ship protection systems (“SPS”) products.

The following table summarizes the consideration paid for ITC and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date, as well as the fair value at the acquisition date (in millions):

	September 25, 2017
Consideration
Cash	$	0.1
Equity (884,890 shares of common stock at $4.02 per share)		3.6
Contingent consideration		0.6
Total Consideration	$	4.3

Recognized amounts of identifiable assets acquired and liabilities assumed
Core technology and know-how	$	3.4
Working capital		0.2
Property, plant and equipment		0.0
Total identifiable net assets	$	3.6
Long-term deferred tax liability		1.1
Goodwill recognized	$	1.7

The results of ITC's operations, which were

not

significant from the date of the Acquisition,

September 25, 2017,

through

March 31, 2019,

are included in the Company’s consolidated results. Assuming the Acquisition had occurred on

April

2017,

the impact on the consolidated results of the Company would

not

have been significant.

Goodwill

At the time of the Acquisition, the Company allocated the purchase price to the assets acquired and liabilities assumed at their estimated fair values as of the date of Acquisition. The excess of the purchase price paid by the Company over the estimated fair value of net assets acquired of

$1.7

million has been recorded as goodwill in the Company's Grid segment. Goodwill represents the value associated with the acquired workforce and synergies related to the merger of the

two

companies.

The Company performed its annual assessment of goodwill on

February 28, 2019

and noted

triggering events from the analysis date to

March 31, 2019

and determined that there was

impairment to goodwill. Additionally,

impairment resulted from the assessment performed in the fiscal year ended

March 31, 2018.

Note 5 - Fair Value Measurements

12 Months Ended

Mar. 31, 2019

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,

2019.

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.

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

March

31,

2019

and

2018

(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, 2019:
Assets:
Cash equivalents	$	41,839	$	41,839	$	—	$	—
Derivative liabilities:
Warrants	$	4,942	$	—	$	—	$	4,942

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2018:
Assets:
Cash equivalents	$	32,589	$	32,589	$	—	$	—
Derivative liabilities:
Warrants	$	1,217	$	—	$	—	$	1,217

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

	Warrants
April 1, 2017	$	1,923
Mark to market adjustment		(706	)
March 31, 2018	$	1,217

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.

Warrants

Warrants were issued in conjunction with a Securities Purchase Agreement (the “Purchase Agreement”) with Capital Ventures International (“CVI”), 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 CVI expired on

October 4, 2017.

See Note

“Warrants and Derivative Liabilities,” for additional information. Outstanding warrants are subject to revaluation at each balance sheet date, and any change in fair value will be recorded as a change in fair value in derivatives and warrants until the earlier of their exercise or expiration.

The Company relies on various assumptions in a lattice model to determine the fair value of warrants. The Company has 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.

- 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 8 - Note Receivable

12 Months Ended

Mar. 31, 2019

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 is 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 is 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.

Note receivable as of

March

31,

2019

consisted of the following (in thousands):

	March 31, 2019			March 31, 2018
Current assets
Note receivable, current	$	3,000		$	3,000
Note receivable discount		(112	)		—
Total current note receivable	$	2,888		$	3,000

Long term assets
Note receivable, long term	$	—		$	3,000
Note receivable discount		—			(336	)
Deferred gain on sale		—			(105	)
Total long term note receivable	$	—		$	2,559

Note 9 - Property, Plant and Equipment

12 Months Ended

Mar. 31, 2019

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,

2019

and

2018

are as follows (in thousands):

	March 31, 2019			March 31, 2018
Construction in progress - equipment	$	603		$	654
Equipment and software		45,705			72,760
Furniture and fixtures		1,269			1,878
Leasehold improvements		1,955			1,426
Property, plant and equipment, gross		49,532			76,718
Less accumulated depreciation		(40,560	)		(64,205	)
Property, plant and equipment, net	$	8,972		$	12,513

Depreciation expense was

$4.3

million and

$11.0

million, for the fiscal years ended

March

31,

2019

and

2018,

respectively. Included in depreciation expense for the year ended

March

31,

2018

$4.9

million of accelerated depreciation recorded to cost of revenues related to revised estimates of the remaining useful lives of certain pieces of manufacturing equipment. Construction in progress - equipment primarily includes capital investments in the Company's leased facility in Ayer, Massachusetts.

Note 12 - Warrants and Derivative Liabilities

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Derivative Instruments and Hedging Activities Disclosure [Text Block]

12.

Warrants and Derivative Liabilities

The Company accounts for its warrants and contingent consideration 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 is 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 ITC with common stock in

September 2017

and sales of common stock under the ATM entered into in

January 2017,

and expires on

June

30,

2020

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.

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 is 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, and expires on

November

13,

2019

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

November 2014

Warrant:

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

	March 31,	December 31,	September 30,	June 30,
Fiscal Year 2017	2018	2017	2017	2017
Risk-free interest rate	2.20%	1.87%	1.49%	1.44%
Expected annual dividend yield	—	—	—	—
Expected volatility	65.86%	65.86%	65.64%	67.21%
Term (years)	1.62	1.87	2.12	2.37
Fair value	$1.1 million	$0.4 million	$0.8 million	$0.9 million

The Company recorded a net loss, resulting from an increase in the fair value of the

November 2014

Warrant of

$3.5

million, and a net gain, resulting from a decrease in the fair value of the

November 2014

Warrant, of

$0.7

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

March

31,

2019

and

2018,

respectively.

Contingent Consideration

The Company evaluated the ITC acquisition Make Whole Payment set forth in the SPA, which ultimately required net settlement cash, and determined the contingent consideration qualified for liability classification and derivative treatment under ASC

815.

As a result, for each period the fair value of the contingent consideration was remeasured and the resulting gain or loss was recognized in operating expenses.

Following is a summary of the key assumptions used to calculate the fair value of the contingent consideration related to the ITC acquisition:

Fiscal Year 2017	September 30, 2017	September 25, 2017
Risk-free interest rate	1.09%	1.09%
Expected annual dividend yield	—	—
Expected volatility	66.54%	65.71%
Term (years)	0.31	0.32
Fair value	$0.4 million	$0.6 million

All of the stock related to this liability was sold as of

December 5, 2017

and the amount of the Make Whole Payment was calculated to be

$0.7

million, and subsequently paid on

January 5, 2018.

As such,

fair value estimate using a Black-Scholes model was needed as the liability was recorded at the known settlement value for the period ending

December 31, 2017.

The Company recorded a net loss of

$0.1

million resulting from an increase in the fair value of the contingent consideration in the fiscal year ended

March

31,

2018.

Note 13 - Income Taxes

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Income Tax Disclosure [Text Block]

13.

Income Taxes

Loss before income taxes for the fiscal years ended

March

31,

2019,

and

2018

are provided in the table as

follows

(in thousands):

	Fiscal years ended March 31,
	2019			2018
Income/(Loss) before income tax expense:
U.S.	$	(24,289	)	$	(100,341	)
Foreign		57,430			67,404
Total	$	33,141		$	(32,937	)

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

	Fiscal years ended March 31,
	2019			2018
Current
Federal	$	1,246		$	374
Foreign		4,399			592
Total current		5,645			966

Deferred
Federal		1,588			(1,086	)
Foreign		(853	)		(41	)
Total deferred		735			(1,127	)

Income tax (benefit) expense	$	6,380		$	(161	)

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,
	2019			2018
Statutory federal income tax rate		(21	)%		(31	)%
Federal rate change		—			351
Deemed dividend and dividends paid		—			7
Foreign income tax rate differential		4			(62	)
Reversal of uncertain tax benefits		—			(3	)
True-up of NOLs		(60	)		11
GILTI		37			—
Other		3			(5	)
Valuation allowance		92			(268	)
Effective income tax rate		-19	%		—	%

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

	March 31, 2019			March 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$	181,657		$	210,194
Research and development and other tax credit carryforwards		13,046			12,828
Accruals and reserves		14,781			22,406
Fixed assets and intangible assets		1,553			1,568
Other		2,785			12,996
Gross deferred tax assets		213,822			259,992
Valuation allowance		(196,340	)		(227,686	)
Total deferred tax assets		17,482			32,306

Deferred tax liabilities:
Intercompany Debt		(16,028	)		(29,130	)
Other		(1,794	)		(2,744	)
Total deferred tax liabilities		(17,822	)		(31,874	)
Net deferred tax asset	$	(340	)	$	432

The Tax Cuts and Jobs Act ("Tax Reform Act"), that was signed into law on

December 22, 2017,

significantly changed the U.S. tax law by, among other things, lowering the corporate income tax rates, implementing a territorial tax system, expanding the tax base, imposing a tax on deemed repatriated earnings of foreign subsidiaries, taxing certain foreign earnings to the U.S. through global intangible low-taxed income ("GILTI"), modifying officer's compensation deduction limitations and creating new limitations on deductible interest expense. The Company recognized the impact of the Tax Reform Act in its consolidated financial statements for the year ended

March 31, 2018.

In accordance with Staff Accounting Bulletin

No.

118

("SAB

118"

), the Company had a measurement period up to

one

year beginning

December 22, 2017

to obtain, analyze and prepare the information needed to complete the accounting requirements of the Tax Reform Act. The Company completed the analysis allowed under SAB

118

when it finalized the deemed repatriation tax computation in conjunction with the filing of the Company's

2017

federal and state tax returns and the final impact did

not

result in any material change from the original estimate.

The Company has elected to recognize the income tax related to GILTI as a period expense in the period the tax is incurred or expected to occur for the year ended

March 31, 2019.

The inclusion of GILTI had

impact on the Company's income tax expense or effective tax rate in the period due to the full valuation allowance applied to the U.S. entity.

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

$196.5

million valuation allowance at

March 31, 2019

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

not

be realized.

March

31,

2019,

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

$776.0

million and

$198.0

million, respectively, which expire in the years ending

March

31,

2019

through

2039.

For U.S. federal tax purpose, approximately

$30.0

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,

2019

through

2039.

March

31,

2019,

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

$21.8

million, which can be carried forward for

five

years and begin to expire

December

31,

2019.

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 updated its study through

June 15, 2017

as a result of the

May 2017

equity offering to determine whether Section

382

could limit the use of its carryforwards in this manner. After completing this study, the Company has concluded that the limitation 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 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.

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

March

31,

2019

was

$30.0

million resulting in the recording of a

$1.7

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,

2019.

The Company did

not

have any gross unrecognized tax benefits at

March

31,

2019

2018.

There were

reversals of uncertain tax positions in the fiscal years ended

March 31, 2019

and

2018.

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

2019

remain open and subject to examination.

All fiscal years from the fiscal year ended

March 31, 2014

through

2019

remain open and subject to examination in Austria. The Company’s tax filings in China for calendar years

2013

and

2014

were examined with

material exceptions. As of

March 31, 2019,

the Company remains open to audit for the calendar years

2016

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

March 31, 2014

through

2019

remain open and subject to examination.

Note 14 - Stockholders' Equity

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

14.

Stockholders’ Equity

Stock-Based Compensation Plans

As of

March

31,

2019,

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”). Both the

2007

Plan and the

2007

Director Plan were approved by the Company’s stockholders on

July 29, 2016.

The

2007

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

422

of the Internal Revenue Code 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 shall be equal to at least 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.

As of

March

31,

2019,

the

2007

Director Plan provided 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

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

As of

March

31,

2019,

the

2007

Plan had

367,507

shares and the

2007

Director Plan had

77,587

shares available for future issuance.

Stock-Based Compensation

The components of employee stock-based compensation for the years ended

March

31,

2019

and

2018

were as follows (in thousands):

	Fiscal years ended March 31,
	2019		2018
Stock options	$	221	$	227
Restricted stock and stock awards		2,781		2,434
Employee stock purchase plan		28		31
Total stock-based compensation expense	$	3,030	$	2,692

The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. There is

unrecognized compensation cost for unvested outstanding stock options for the fiscal year ended

March

31,

2019.

The total unrecognized compensation cost for unvested outstanding restricted stock was

$2.6

million for the fiscal year ended

March

31,

2019.

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

1.5

years.

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

March

31,

2019

and

2018

(in thousands):

	Fiscal years ended March 31,
	2019		2018
Cost of revenues	$	116	$	137
Research and development		365		373
Selling, general and administrative		2,549		2,182
Total	$	3,030	$	2,692

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, 2018		280,891		$	69.51
Canceled/forfeited		(116,626	)		31.76
Outstanding at March 31, 2019		164,265		$	96.30		3.1	$	—
Exercisable at March 31, 2019		164,265		$	96.30		3.0	$	—
Fully vested and expected to vest at March 31, 2019		164,265		$	96.30		3.1	$	—

There were

stock options granted during the fiscal years ended

March

31,

2019

2018.

Intrinsic value represents the amount by which the market price of the common stock exceeds the exercise price of the options. Given the decline in the Company’s stock price, exercisable options as of

March

31,

2019

and

2018

had

intrinsic value.

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

March

31,

2019:

	Shares			Weighted Average Grant Date Fair Value		Intrinsic Aggregate Value (thousands)
Outstanding at March 31, 2018		896,486		$	4.65
Granted		532,053			6.9
Vested		(405,802	)		6.1
Forfeited		(68,789	)		5.04
Outstanding at March 31, 2019		953,948		$	5.26	$	12,268

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

March

31,

2019

and

2018

was

$3.6

million and

$3.3

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

March

31,

2019

and

2018

was

$2.6

million and

$1.4

million, respectively.

There we

57,000

performance-based restricted shares awarded during th

e fiscal year ended

March 31, 2019

and

267,125

performance-based restricted shares awarded during the fiscal year ended

March

31,

2018.

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 has 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,

2019,

the ESPP had

239,954

shares available for future issuance. The Company recognized less than

$0.1

million of compensation expense for the fiscal year ended

March

31,

2019

and

2018,

related to the ESPP.

Equity Offerings

May 10, 2017,

the Company completed an additional equity offering (the "Offering") which included a

-day option (the "Option") to the underwriters to purchase up to an additional

600,000

shares of common stock at the public offering price. The total net proceeds to the Company during the year ended

March 31, 2018

from the Offering and Option were approximately

$17.0

million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Company terminated its At Market Issuance Sales Agreement ("ATM") with FBR Capital Markets & Co ("FBR") in conjunction with the Offering.

Note 15 - Commitments and Contingencies

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

15.

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

Operating leases include minimum payments under leases for the Company’s facilities and certain equipment. The Company’s primary leased facilities are located in Klagenfurt, Austria; Suzhou, China; Ayer, Massachusetts; Timisoara, Romania; and Pewaukee, Wisconsin; with a combined total of approximately

187,000

square feet of space. These leases have varying expiration dates through

November 2022

which can generally be terminated at the Company’s request after a

six

month advance notice. The Company leases other locations which focus primarily on applications engineering, sales and/or field service and do

not

have significant leases or physical presence. See Item

“Properties” for further information.

Minimum future lease commitments at

March

31,

2019

were as follows (in thousands):

Fiscal years ended March 31,	Total
2020	$	1,121
2021		894
2022		648
2023		416
2024		65
Total	$	3,144

Rent expense under the operating leases mentioned above was as follows (in thousands):

	Fiscal years ended March 31,
	2019		2018
Rent expense	$	1,286	$	1,510

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,

2019,

the Company had

$0.7

million of restricted cash included in long-term assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts. These deposits are held in interest bearing accounts.

Note 17 - Restructuring

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Restructuring and Related Activities Disclosure [Text Block]

17.

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 .

April 3, 2017,

the Board of Directors approved a plan to reduce the Company’s global workforce by approximately

8%,

effective

April

2017.

The purpose of the workforce reduction was to reduce operating expenses to better align with the Company’s current revenues. Included in the

$1.3

million severance pay, charged to operations in the fiscal year ended

March 31, 2018,

$0.5

million of severance pay for

one

of the Company's former executive officers pursuant to the terms of a severance agreement dated

June 30, 2017.

Under the terms of the severance agreement, the Company's former executive officer was entitled to

months of his base salary, and received his final severance payment in

December 2018.

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

March 31, 2019

and

2018

(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	$	—		$	—		$	—

Accrued restructuring balance at April 1, 2017	$	—		$	—		$	—
Charges to operations		1,325			202			1,527
Cash payments		(1,063	)		(29	)		(1,092	)
Accrued restructuring balance at March 31, 2018	$	262		$	173		$	435

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.

Note 18 - Business Segments

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

18.

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 power through our 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 our 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,
	2019		2018
Revenues:
Grid	$	34,290	$	34,109
Wind		21,917		14,294
Total	$	56,207	$	48,403

	Fiscal Years Ended March 31,
	2019			2018
Operating income (loss):
Grid	$	(10,600	)	$	(18,963	)
Wind		48,103			(8,904	)
Unallocated corporate expenses		(3,480	)		(4,290	)
Total	$	34,023		$	(32,157	)

Total assets for the

two

business segments as of

March

31,

2019

and

March

31,

2018

are as follows (in thousands):

	March 31, 2019		March 31, 2018
Grid	$	31,075	$	37,012
Wind		8,167		16,790
Corporate assets		80,088		34,373
Total	$	119,330	$	88,175

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 loss.

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

$3.0

million and

$2.7

million, in the fiscal years ended

March

31,

2019

and

2018,

respectively, restructuring charges of

$0.5

million and

$1.5

million for the fiscal years ended

March

31,

2019

and

2018,

and a change in the fair value of contingent consideration of

$0.1

million for the fiscal year ended

March

31,

2018.

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

	March 31,
	2019		2018
North America	$	8,555	$	11,933
Europe		345		478
Asia Pacific		72		102
Total	$	8,972	$	12,513

Note 19 - Recent Accounting Pronouncements

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

19.

Recent Accounting Pronouncements

May 2014,

the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board ("IASB") issued, ASU

2014

09,

Revenue from Contracts with Customers (Topic

606

)

. The guidance substantially converges final standards on revenue recognition between the FASB and IASB providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all existing revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles. The FASB has subsequently issued multiple amendments to ASU

2014

which are all effective for annual reporting periods beginning after

December 15, 2017.

As of

April 1, 2018,

the Company has adopted ASU

2014

and its amendments, reported the impact in its consolidated financial statements, and implemented changes to its business processes, systems and controls to support revenue recognition and the related disclosures under this ASU. The Company’s assessment included a detailed review of representative contracts from each of the Company’s revenue streams and a comparison of its historical accounting policies and practices to the new standard. The Company adopted the new standards retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective transition method) to all existing contracts that have remaining obligations as of

April 1, 2018.

Accordingly, the Company has elected to retroactively adjust only those contracts that do

not

meet the definition of a complete contract at the date of the initial application. This guidance has led to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time. There were

changes in the accounting for its largest revenue stream which includes Inox Wind as its primary customer. Across other revenue streams such as D-VAR® Equipment and D-VAR® turnkey projects, the timing of revenue recognition will be affected for multiple types of contracts, primarily multiple performance obligation contracts in its Grid business unit, but those differences did

not

have a material impact on its consolidated financial statements. The adjustment to opening accumulated deficit was

not

significant in the period commencing on

April 1, 2018.

Additionally, the adoption of this new standard did

not

have any tax impact on the consolidated financial statements. As part of this analysis, the Company evaluated its information technology capabilities and systems, and did

not

incur significant information technology costs to modify systems currently in place.

January 2016,

the FASB issued ASU

2016

01,

Financial Instruments-Overall (Subtopic

825

): Recognition and Measurement of Financial Assets and Financial Liabilities

. The amendments in ASU

2016

will enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU is effective for annual reporting periods beginning after

December 15, 2017,

and interim periods within those fiscal years. The Company adopted ASU

2016

effective

April 1, 2018

and noted

significant impact to its consolidated financial statements.

February 2016,

the FASB issued ASU

2016

02,

Leases (Topic

842

)

. The guidance in this ASU supersedes the leasing guidance in Topic

840,

Leases

. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than

months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. This ASU and its amendments are effective for fiscal years beginning after

December 15, 2018,

including interim periods within those fiscal years.

•

July 2018,

the FASB issued ASU

2018

10,

Codification improvements to Topic

842,

Leases.

The amendments in ASU

2018

provide more clarification in regards to the application and requirements of ASU

2016

02.

•

July 2018,

the FASB issued ASU

2018

11,

Topic

842,

Leases - Targeted improvements.

The amendments in ASU

2018

provide for the option to adopt the standard prospectively and recognize a cumulative-effect adjustment to the opening balance of retained earnings as well as offer a new practical expedient that will allow the Company to elect, by class of underlying asset, to

not

separate non-lease and lease components in certain circumstances and instead to account for those components as a single item.

The Company has evaluated the provisions of ASU

2016

and its amendments, and assessing the impact the adoption of this guidance will have on its financial position, results of operations and disclosures. This process has included identifying the implementation team, applying the revised definition of a lease per ASC

842

to existing agreements, and from that information, creating an initial population. The Company made the policy election to exclude all leases shorter than

months from the recognition of the recording of the right of use ("ROU") asset and related liabilities. The Company elected the package of

three

practical expedients in regards to all leases that commenced before the effective date. The Company made a policy election to

not

separate non-lease and lease components for all asset classes. The adoption of this guidance will result in certain changes to the financial statements to add the related asset and liability accounts for all of its operating leases. The Company will continue to assess its agreements for any other impacts that

may

result from the adoption of this standard. Based on the analysis of the initial lease population, the Company has determined that its initial population will be made up entirely of operating leases. The Company has prepared control wording, is finalizing the overall lease policies and has identified and implemented any changes that were necessary to comply with the provisions of ASU

2016

02.

ASU

2016

became effective on

April 1, 2019,

and the Company adopted the standard using the modified retrospective transition method, which impacts all leases existing at, or entered into after, the period of adoption. For all leases existing at the time of adoption the Company will recognize a cumulative effect adjustment to its opening balance of retained earnings as of

April 1, 2019.

As a result of the adoption of ASC

842,

the Company expects to recognize an increase in net lease assets between

$3.0

million and

$5.0

million and an increase in net lease liabilities betw

een

$3.0

million and

$5.0

million related to the r

ecognition of a right-of-use asset and the associated liability.

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

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. The Company is currently evaluating the impact, if any, the adoption of ASU

2016

may

have on its consolidated financial statements.

2016,

the FASB issued the following

two

ASU's on Statement of Cash Flows (Topic

230

). Both amendments are effective for annual reporting periods beginning after

December 15, 2017,

including interim periods within that year.

•

August 2016,

the FASB issued ASU

2016

15,

Statement of Cash Flows (Topic

230

): Classification of Certain Cash Receipts and Cash Payments

. The amendments in ASU

2016

provide more guidance towards the classification of multiple different types of cash flows in order to reduce the diversity in reporting across entities.

•

November 2016,

the FASB issued ASU

2016

18,

Statement of Cash Flows (Topic

230

): Restricted Cash

. The amendments in ASU

2016

explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.

The Company adopted ASU

2016

and ASU

2016

effective

April 1, 2018

and the consolidated statement of cash flow has been prepared to conform with ASU

2016

for all periods presented.

October 2016,

the FASB issued ASU

2016

16,

Income Taxes (Topic

740

): Intra-Entity Transfers of Assets Other Than Inventory

. The amendments in ASU

2016

will improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The ASU is effective for annual reporting periods beginning after

December 15, 2017,

including interim periods within that year. The Company adopted ASU

2016

effective

April 1, 2018

and noted

significant impact to its consolidated financial statements.

February 2017,

the FASB issued ASU

2017

05,

Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic

610

)

. The amendments in ASU

2017

clarify the scope of Subtopic

610

20,

Other Income-Gains and Losses from the Derecognition of Non-financial Assets

, and add guidance for partial sales of non-financial assets. Subtopic

610

20,

which was issued in

May 2014

as a part of ASU

No.

2014

09,

Revenue from Contracts with Customers

(Topic

606

), provides guidance for recognizing gains and losses from the transfer of non-financial assets in contracts with non-customers. The Company adopted ASU

2017

effective

April 1, 2018

and adjusted the opening balance of accumulated deficit by

$0.1

million for recognition of the deferred gain on the sale of the

Jackson Road building that occurred on

March 28, 2018.

May 2017,

the FASB issued ASU

2017

09,

Compensation - Stock Compensation (Subtopic

718

) Scope of Modification Accounting

. The amendments in ASU

2017

provide clarity and reduce both (

) diversity in practice and (

) cost and complexity when applying the guidance in Topic

718,

Compensation—Stock Compensation, to a change to the terms or conditions of a share-based payment award. The ASU is effective for annual reporting periods beginning after

December 15, 2017,

including interim periods within those periods. The Company adopted ASU

2017

effective

April 1, 2018

and noted

significant impact to its consolidated financial statements.

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

provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should

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. The Company is currently evaluating the impact of the adoption of ASU

2017

and does

not

expect a significant impact on its consolidated financial statements, primarily due to the put option feature within the Company's warrant agreements which requires continued liability classification under ASC

480.

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

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. The Company is currently evaluating the impact the adoption of ASU

2017

may

have on its consolidated financial statements.

June 2018,

the FASB issued ASU

2018

07,

Compensation - Stock Compensation (Topic

718

): Improvements to Non-Employee Share Based Payment Accounting

. The amendments in ASU

2018

provide for the simplification of the measurement of share-based payment transactions for acquiring goods and services from non-employees. The ASU is effective for annual reporting periods beginning after

December 15, 2018,

including interim periods within those periods. The Company adopted ASU

2018

effective

April 1, 2018

and noted

significant impact on its consolidated financial statements.

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

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. The Company is currently evaluating the impact the adoption of ASU

2018

may

have on its consolidated financial statements.

Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

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.

Receivable [Policy Text Block]

Accounts Receivable

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. As of

March

31,

2018,

Inox accounted for approximately

32%

and Fuji Bridex Pte Ltd for approximately

17%

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,

2019

and

2018,

the Company recorded inventory reserves of approximately

$0.9

million and

$0.4

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

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

Property, Plant and Equipment

Asset Classification		Estimated Useful Life in Years
Building		40
Process upgrades to the building		10-40
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, 2019

and

2018.

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

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

The Company performed its annual assessment of goodwill on

February 28, 2019

and noted

triggering events from the analysis date to

March 31, 2019

and determined that there was

impairment to goodwill. Additionally, there was

impairment identified for the fiscal year ended

March 31, 2018

based on the assessment performed in prior year.

Equity Method Investments [Policy Text Block]

Equity Method Investments

The Company uses the equity method of accounting for investments in entities in which it has an ownership interest, but does

not

The Company periodically tests its investments for potential impairment whenever events and circumstances indicate a loss in the fair value of the investments

may

be other than temporary. There were

minority investments as of

March

31,

2019

and

2018.

Revenue [Policy Text Block]

Revenue Recognition

April 1, 2018,

the Company adopted ASC

606,

Revenue from Contracts with Customers

using the modified retrospective method, therefore prior period amounts have

not

been restated and continue to be reported under the accounting standards in effect for those periods.

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.

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.

continuing performance obligation in regards to the purchased product and these products have been segregated from our inventories and cannot be used to fill other orders received. There were

such transactions in revenue for the fiscal year ended

March 31, 2019.

For the fiscal year ended

March

31,

2018,

such transactions recognized as revenue were

$3.7

million.

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 generally provides a

one

three

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.

December 22, 2017,

the Tax Cuts and Jobs Act of

2017

(the "Act") was signed into law making significant changes to the Internal Revenue Code. Changes include, but are

not

limited to, a corporate tax rate decrease from

34%

21%

effective for tax years beginning after

December 31, 2017

and a

one

-time mandatory deemed repatriation of cumulative foreign earnings. See Note

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's adoption of ASU

2018

Compensation - Stock Compensation (Topic

718

): Improvements to Non-Employee Share Based Payment Accounting

April 1,

201

also resulted in

the acc

ounting 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,

2019

and

2018,

common equivalent shares of

907,988,

and

1,157,895,

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,

2019

and

2018

(in thousands except per share amounts):

	Fiscal year ended March 31,
	2019			2018
Numerator:
Net income (loss)	$	26,761		$	(32,776	)
Denominator:
Weighted-average shares of common stock outstanding		21,265			19,621
Weighted-average shares subject to repurchase		(930	)		(654	)
Shares used in per-share calculation — basic		20,335			18,967
Shares used in per-share calculation — diluted		20,726			18,967
Net income (loss) per share — basic	$	1.32		$	(1.73	)
Net income (loss) per share — diluted	$	1.29		$	(1.73	)

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency Translation

$1.6

million and (

$2.8

) million, for the fiscal years ended

March

31,

2019

and

2018,

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,

2020

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

15,

“Commitments and Contingencies,” for further information.

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

Disclosure of Fair Value of Financial Instruments

March

31,

2019

and

2018.

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, 2019

Notes Tables

Property Plant and Equipment Useful Life [Table Text Block]

Asset Classification		Estimated Useful Life in Years
Building		40
Process upgrades to the building		10-40
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,
	2019			2018
Numerator:
Net income (loss)	$	26,761		$	(32,776	)
Denominator:
Weighted-average shares of common stock outstanding		21,265			19,621
Weighted-average shares subject to repurchase		(930	)		(654	)
Shares used in per-share calculation — basic		20,335			18,967
Shares used in per-share calculation — diluted		20,726			18,967
Net income (loss) per share — basic	$	1.32		$	(1.73	)
Net income (loss) per share — diluted	$	1.29		$	(1.73	)

Note 3 - Revenue Recognition (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	March 31, 2018			Opening Adjustment			April 1, 2018
Assets:
Accounts Receivable	$	7,365		$	(678	)	$	6,687
Inventory		19,780			(1,599	)		18,181
Prepaid expenses and other current assets		2,947			2,277			5,224
Notes receivable, long term portion		2,559			105			2,664

Liabilities and Stockholders' Equity:
Accounts payable and accrued expenses	$	(12,625	)	$	(2,729	)	$	(15,354	)
Deferred revenue		(13,483	)		2,657			(10,826	)

Accumulated deficit	$	(988,333	)	$	(33	)	$	(988,366	)

Disaggregation of Revenue [Table Text Block]

	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, Asset and Liability [Table Text Block]

	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	2019	2018
Inox Wind Limited	Wind	34%	27%
Vestas	Grid	15%	<10%

Note 5 - Fair Value Measurements (Tables)

12 Months Ended

Mar. 31, 2019

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, 2019:
Assets:
Cash equivalents	$	41,839	$	41,839	$	—	$	—
Derivative liabilities:
Warrants	$	4,942	$	—	$	—	$	4,942

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2018:
Assets:
Cash equivalents	$	32,589	$	32,589	$	—	$	—
Derivative liabilities:
Warrants	$	1,217	$	—	$	—	$	1,217

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

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

	Warrants
April 1, 2017	$	1,923
Mark to market adjustment		(706	)
March 31, 2018	$	1,217

Note 10 - Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	2019							2018
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Core technology and know-how	$	4,970	$	(2,080	)	$	2,890	$	8,703	$	(5,473	)	$	3,230	5-10

	March 31,
	2019		2018
Intangible assets by geography:
U.S.	$	2,890	$	3,230
Total	$	2,890	$	3,230

	March 31,
	2019		2018
Intangible assets by business segments:
Grid	$	2,890	$	3,230
Total	$	2,890	$	3,230

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

Fiscal years ending March 31,	Total
2020		340
2021		340
2022		340
2023		340
2024		340
Thereafter		1,190
Total	$	2,890

Note 11 - Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	March 31, 2019		March 31, 2018
Accounts payable	$	2,939	$	3,096
Accrued inventories in-transit		244		1,207
Accrued other miscellaneous expenses		1,759		2,412
Advanced deposits		631		—
Accrued compensation		5,404		3,605
Income taxes payable		3,363		536
Accrued warranty		1,545		1,769
Total	$	15,885	$	12,625

Schedule of Product Warranty Liability [Table Text Block]

	Fiscal Years Ended March 31,
	2019			2018
Balance at beginning of period	$	1,769		$	2,344
Change in accruals for warranties during the period		727			890
Settlements during the period		(951	)		(1,465	)
Balance at end of period	$	1,545		$	1,769

Note 12 - Warrants and Derivative Liabilities (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

Fair Value Option, Disclosures [Table Text Block]

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

	March 31,	December 31,	September 30,	June 30,
Fiscal Year 2017	2018	2017	2017	2017
Risk-free interest rate	2.20%	1.87%	1.49%	1.44%
Expected annual dividend yield	—	—	—	—
Expected volatility	65.86%	65.86%	65.64%	67.21%
Term (years)	1.62	1.87	2.12	2.37
Fair value	$1.1 million	$0.4 million	$0.8 million	$0.9 million

Summary of Assumptions to Contingent Consideration [Table Text Block]

Fiscal Year 2017	September 30, 2017	September 25, 2017
Risk-free interest rate	1.09%	1.09%
Expected annual dividend yield	—	—
Expected volatility	66.54%	65.71%
Term (years)	0.31	0.32
Fair value	$0.4 million	$0.6 million

Note 13 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	Fiscal years ended March 31,
	2019			2018
Income/(Loss) before income tax expense:
U.S.	$	(24,289	)	$	(100,341	)
Foreign		57,430			67,404
Total	$	33,141		$	(32,937	)

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

	Fiscal years ended March 31,
	2019			2018
Current
Federal	$	1,246		$	374
Foreign		4,399			592
Total current		5,645			966

Deferred
Federal		1,588			(1,086	)
Foreign		(853	)		(41	)
Total deferred		735			(1,127	)

Income tax (benefit) expense	$	6,380		$	(161	)

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

	Fiscal years ended March 31,
	2019			2018
Statutory federal income tax rate		(21	)%		(31	)%
Federal rate change		—			351
Deemed dividend and dividends paid		—			7
Foreign income tax rate differential		4			(62	)
Reversal of uncertain tax benefits		—			(3	)
True-up of NOLs		(60	)		11
GILTI		37			—
Other		3			(5	)
Valuation allowance		92			(268	)
Effective income tax rate		-19	%		—	%

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

	March 31, 2019			March 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$	181,657		$	210,194
Research and development and other tax credit carryforwards		13,046			12,828
Accruals and reserves		14,781			22,406
Fixed assets and intangible assets		1,553			1,568
Other		2,785			12,996
Gross deferred tax assets		213,822			259,992
Valuation allowance		(196,340	)		(227,686	)
Total deferred tax assets		17,482			32,306

Deferred tax liabilities:
Intercompany Debt		(16,028	)		(29,130	)
Other		(1,794	)		(2,744	)
Total deferred tax liabilities		(17,822	)		(31,874	)
Net deferred tax asset	$	(340	)	$	432

Note 14 - Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	Fiscal years ended March 31,
	2019		2018
Stock options	$	221	$	227
Restricted stock and stock awards		2,781		2,434
Employee stock purchase plan		28		31
Total stock-based compensation expense	$	3,030	$	2,692

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

	Fiscal years ended March 31,
	2019		2018
Cost of revenues	$	116	$	137
Research and development		365		373
Selling, general and administrative		2,549		2,182
Total	$	3,030	$	2,692

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, 2018		280,891		$	69.51
Canceled/forfeited		(116,626	)		31.76
Outstanding at March 31, 2019		164,265		$	96.30		3.1	$	—
Exercisable at March 31, 2019		164,265		$	96.30		3.0	$	—
Fully vested and expected to vest at March 31, 2019		164,265		$	96.30		3.1	$	—

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, 2018		896,486		$	4.65
Granted		532,053			6.9
Vested		(405,802	)		6.1
Forfeited		(68,789	)		5.04
Outstanding at March 31, 2019		953,948		$	5.26	$	12,268

Note 15 - Commitments and Contingencies (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Fiscal years ended March 31,	Total
2020	$	1,121
2021		894
2022		648
2023		416
2024		65
Total	$	3,144

Schedule of Rent Expense [Table Text Block]

	Fiscal years ended March 31,
	2019		2018
Rent expense	$	1,286	$	1,510

Note 18 - Business Segments (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	Fiscal Years Ended March 31,
	2019		2018
Revenues:
Grid	$	34,290	$	34,109
Wind		21,917		14,294
Total	$	56,207	$	48,403

	Fiscal Years Ended March 31,
	2019			2018
Operating income (loss):
Grid	$	(10,600	)	$	(18,963	)
Wind		48,103			(8,904	)
Unallocated corporate expenses		(3,480	)		(4,290	)
Total	$	34,023		$	(32,157	)

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

	March 31, 2019		March 31, 2018
Grid	$	31,075	$	37,012
Wind		8,167		16,790
Corporate assets		80,088		34,373
Total	$	119,330	$	88,175

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

	March 31,
	2019		2018
North America	$	8,555	$	11,933
Europe		345		478
Asia Pacific		72		102
Total	$	8,972	$	12,513

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) $ in Thousands					1 Months Ended	12 Months Ended
	Mar. 28, 2019 USD ($)	Jul. 04, 2018 USD ($)	Jul. 03, 2018 USD ($)	Feb. 01, 2018 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 27, 2018 USD ($)	Apr. 01, 2018 USD ($)	Mar. 28, 2018 USD ($)	Mar. 31, 2017 USD ($)
Net Income (Loss) Attributable to Parent, Total						$ 26,761	$ (32,776)
Retained Earnings (Accumulated Deficit), Ending Balance						(961,539)	(988,333)		$ (988,366)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance						78,198	34,249				$ 27,744
Net Cash Provided by (Used in) Operating Activities, Total						42,714	(24,827)
Gain (Loss) Related to Litigation Settlement, Total						52,698
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total							$ 2,559		$ 2,664
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
Inox Wind Limited [Member]
Supply Agreement, Aggregate Value					$ 210,000
Supply Commitment, Extension Period					3 years

Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Inventory Valuation Reserves, Ending Balance	$ 900	$ 400
Asset Impairment Charges, Total	0	0
Goodwill, Impairment Loss	0	0
Equity Method Investments	0	0
Revenues, Bill and Hold Transactions	$ 0	$ 3,700
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	907,988	1,157,895
Foreign Currency Transaction Gain (Loss), before Tax, Total	$ 1,600	$ 2,800
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%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Inox [Member]
Concentration Risk, Percentage		32.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Fuji Bridex Pte Ltd [Member]
Concentration Risk, Percentage		17.00%

Note 2 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details)	12 Months Ended
	Mar. 31, 2019
Building [Member]
Property, plant and equipment, useful life (Year)	40 years
Building Improvements [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	10 years
Building Improvements [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	40 years
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, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ 26,761	$ (32,776)
Weighted-average shares of common stock outstanding (in shares)	21,265	19,621
Weighted-average shares subject to repurchase (in shares)	(930)	(654)
Shares used in per-share calculation — basic (in shares)	20,335	18,967
Shares used in per-share calculation — diluted (in shares)	20,726	18,967
Net income (loss) per share — basic (in dollars per share)	$ 1.32	$ (1.73)
Net income (loss) per share — diluted (in dollars per share)	$ 1.29	$ (1.73)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

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

+ References + Details

Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Apr. 01, 2018
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 33
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	85.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| Non-US [Member]
Concentration Risk, Percentage	74.00%	64.00%
Minimum [Member]
Warranty Period	1 year
Contract with Customer, Payment Term	30 days
Maximum [Member]
Warranty Period	2 years
Extended Service Warranty, Term	4 years
Contract with Customer, Payment Term	60 days
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (100)
Accounting Standards Update 2017-05 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 100

Note 3 - Revenue Recognition 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 $ in Millions	Mar. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Amount	$ 11.6
Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year 30 days
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 years

Note 3 - Revenue Recognition - Cumulative Effect of ASU 2014-09 (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Accounts Receivable	$ 7,855	$ 6,687	$ 7,365
Inventory	12,119	18,181	19,780
Prepaid expenses and other current assets	3,053	5,224	2,947
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total		2,664	2,559
Accounts payable and accrued expenses	(15,885)	(15,354)	(12,625)
Deferred revenue	(7,557)	(10,826)	(13,483)
Retained Earnings (Accumulated Deficit), Ending Balance	$ (961,539)	(988,366)	$ (988,333)
Accounting Standards Update 2014-09 [Member]
Accounts Receivable		(678)
Inventory		(1,599)
Prepaid expenses and other current assets		2,277
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total		105
Accounts payable and accrued expenses		(2,729)
Deferred revenue		2,657
Retained Earnings (Accumulated Deficit), Ending Balance		$ (33)

Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues	$ 56,207	$ 48,403
Grid [Member]
Revenues	34,290	34,109
Grid [Member] \| Americas [Member]
Revenues	22,811
Grid [Member] \| Asia Pacific [Member]
Revenues	7,267
Grid [Member] \| EMEA [Member]
Revenues	4,212
Wind [Member]
Revenues	21,917	$ 14,294
Wind [Member] \| Americas [Member]
Revenues	112
Wind [Member] \| Asia Pacific [Member]
Revenues	21,200
Wind [Member] \| EMEA [Member]
Revenues	605
Equipment and Systems [Member] \| Grid [Member]
Revenues	26,645
Equipment and Systems [Member] \| Wind [Member]
Revenues	19,287
Services and Technology Development [Member] \| Grid [Member]
Revenues	7,645
Services and Technology Development [Member] \| Wind [Member]
Revenues	$ 2,630

Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2019 USD ($)
Unbilled AR, beginning balance	$ 3,016
Unbilled AR, impact of adoption of ASC 606	0
Unbilled AR, increase (decrease) due to customer billings	(12,076)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	11,324
Unbilled AR, other changes and FX impact	(51)
Unbilled AR, ending balance	2,213
Deferred Program Costs, beginning balance	2,567
Deferred Program Costs, impact of adoption of ASC 606	(1,599)
Deferred Program Costs, increases for costs incurred to fulfill performance obligations	1,585
Deferred Program Costs, decrease due to cost recognition on completed performance obligations	(2,212)
Deferred Program Costs, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(9)
Deferred Program Costs, other changes and FX impact	(14)
Deferred Program Costs, ending balance	318
Contract Liabilities, beginning balance	21,937
Contract Liabilities, impact of adoption of ASC 606	(2,657)
Increase (decrease) due to customer billings	20,540
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(23,084)
Other changes and FX impact	(1,215)
Contract Liabilities, ending balance	$ 15,521

Note 3 - Revenue Recognition - Revenues By Major Customers (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Wind [Member] \| Inox Wind Limited [Member]
Concentration risk percentage	34.00%	27.00%
Grid [Member] \| Vestas WTG Mexico [Member]
Concentration risk percentage	15.00%	10.00%

Note 4 - Acquisition and Related Goodwill (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Sep. 25, 2017	Mar. 31, 2019	Mar. 31, 2018
Goodwill, Ending Balance		$ 1,719	$ 1,719
Goodwill, Impairment Loss		$ 0	$ 0
Infinia Technology Corporation (ITC) [Member]
Business Combination, Consideration Transferred, Excluding Contingent Consideration	$ 3,800
Goodwill, Ending Balance	$ 1,700

Note 4 - Acquisition and Related Goodwill - Assets Acquiredand Liabilities Assumed Recognized (Details) - USD ($)		12 Months Ended
	Sep. 25, 2017	Mar. 31, 2019	Mar. 31, 2018
Issuance of common stock in connection with the purchase of Infinia Technology Corporation			$ 3,498,000
Goodwill recognized		$ 1,719,000	$ 1,719,000
Infinia Technology Corporation (ITC) [Member]
Cash	$ 100,000
Issuance of common stock in connection with the purchase of Infinia Technology Corporation	3,600,000
Contingent consideration	600,000
Total Consideration	4,300,000
Core technology and know-how	3,400,000
Working capital	200,000
Property, plant and equipment	0
Total identifiable net assets	3,600,000
Long-term deferred tax liability	1,100,000
Goodwill recognized	$ 1,700,000

Note 5 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Derivative liabilities	$ 4,942	$ 1,217
Fair Value, Recurring [Member] \| Warrant [Member]
Derivative liabilities	4,942	1,217	$ 1,923
Reported Value Measurement [Member] \| Fair Value, Recurring [Member]
Cash equivalents	41,839	32,589
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Warrant [Member]
Derivative liabilities	4,942	1,217
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	41,839	32,589
Derivative liabilities	0	0
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Derivative liabilities	0	0
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Derivative liabilities	$ 4,942	$ 1,217

Note 6 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Accounts receivable (billed)	$ 5,642		$ 4,403
Accounts receivable (unbilled)	2,213		3,016
Less: Allowance for doubtful accounts			(54)
Accounts receivable, net	$ 7,855	$ 6,687	$ 7,365

Note 7 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Raw materials	$ 5,474		$ 7,526
Work-in-process	1,922		920
Finished goods	4,405		8,767
Deferred program costs	318		2,567
Net inventory	$ 12,119	$ 18,181	$ 19,780

Note 8 - Note Receivable (Details Textual) $ in Thousands	Feb. 01, 2018 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Apr. 01, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 28, 2018
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total				$ 2,664	$ 2,559
Notes and Loans Receivable, Noncurrent Portion of Unamortized Debt Discount					336
Deferred Gain on Sale of Property					$ 105
64 Jackson, LLC [Member]
Purchase and Sale Agreement, Total Consideration	$ 23,000
Security Deposit	1,000
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total	$ 6,000
Notes and Loans Receivable, Number of Installments	2
Notes and Loans Receivable, Installment Amount	$ 3,000
Notes Receivable, Stated Interest Rate	1.96%					1.96%
Notes Receivable, Fair Value Disclosure	$ 5,700
Note Receivable Discount Rate	6.00%
Notes and Loans Receivable, Noncurrent Portion of Unamortized Debt Discount	$ 300	$ 100
Deferred Gain on Sale of Property			$ 100

Note 8 - Note Receivable - Summary of Note Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Note receivable, current	$ 3,000		$ 3,000
Note receivable discount	(112)
Total current note receivable	2,888		3,000
Note receivable, long term			3,000
Note receivable discount			(336)
Deferred gain on sale			(105)
Total long term note receivable		$ 2,664	$ 2,559

Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Property, plant and equipment, gross	$ 49,532	$ 76,718
Less accumulated depreciation	(40,560)	(64,205)
Property, plant and equipment, net	8,972	12,513
Construction in Progress [Member]
Property, plant and equipment, gross	603	654
Equipment and Software [Member]
Property, plant and equipment, gross	45,705	72,760
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,269	1,878
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 1,955	$ 1,426

Note 10 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Book Value	$ 2,890	$ 3,230
UNITED STATES
Net Book Value	2,890	3,230
Core Technology and Know-how [Member]
Gross Amount	4,970	8,703
Accumulated Amortization	(2,080)	(5,473)
Net Book Value	$ 2,890	$ 3,230
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, 2019	Mar. 31, 2018
2020	$ 340
2021	340
2022	340
2023	340
2024	340
Thereafter	1,190
Total	$ 2,890	$ 3,230

Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018	Mar. 31, 2017
Accounts payable	$ 2,939		$ 3,096
Accrued inventories in-transit	244		1,207
Accrued other miscellaneous expenses	1,759		2,412
Advanced deposits	631
Accrued compensation	5,404		3,605
Income taxes payable	3,363		536
Accrued warranty	1,545		1,769	$ 2,344
Total	$ 15,885	$ 15,354	$ 12,625

Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Balance at beginning of period	$ 1,769	$ 2,344
Change in accruals for warranties during the period	727	890
Settlements during the period	(951)	(1,465)
Balance at end of period	$ 1,545	$ 1,769

Note 12 - Warrants and Derivative Liabilities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended
	Apr. 17, 2019	Jan. 05, 2018	Dec. 19, 2014	Nov. 13, 2014	Mar. 31, 2019	Mar. 31, 2018
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants					$ (3,725)	$ 706
Payment for Contingent Consideration Liability, Operating Activities		$ 700
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability						71
November 2014 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 7.81
Investment Warrants Expiration Date				Nov. 13, 2019
Common Unit, Issued				909,090
Common Shares Per Unit				1
Class of Warrant or Right, Number of Warrants to Purchase One Share of Stock				0.9
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				818,181
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants					$ (3,500)	700
Hercules Technology Growth Capital [Member] \| Subsequent Event [Member]
Stock Issued During Period, Shares, Warrant Exercised	22,821
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| First Warrant [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock					13,927
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| Second Warrant [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock					25,641
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| Hercules Warrants [Member]
Purchase Commitment, Issuance of Warrants, Shares of Common Stock			58,823
Class of Warrant or Right, Exercise Price of Warrants or Rights					$ 7.85
Investment Warrants Expiration Date					Jun. 30, 2020
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	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)
Fair value	$ 4.6	$ 3.6	$ 1.3	$ 1.6	$ 1.1	$ 0.4	$ 0.8	$ 0.9
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.0243	0.0261	0.0262	0.024	0.022	0.0187	0.0149	0.0144
Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.7561	0.7029	0.6366	0.674	0.6586	0.6586	0.6564	0.6721
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	0.62	0.87	1.12	1.37	1.62	1.87	2.12	2.37

Note 12 - Warrants and Derivative Liabilities - Contingent Consideration (Details) $ in Millions	Sep. 30, 2017 USD ($)	Sep. 25, 2017 USD ($)
Fair value	$ 0.4	$ 0.6
Measurement Input, Risk Free Interest Rate [Member]
Contingent consideration, measurement input	0.0109	0.0109
Measurement Input, Expected Dividend Rate [Member]
Contingent consideration, measurement input
Measurement Input, Price Volatility [Member]
Contingent consideration, measurement input	0.6654	0.6571
Measurement Input, Expected Term [Member]
Contingent consideration, measurement input	0.31	0.32

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Deferred Tax Assets, Valuation Allowance, Total	$ 196,340	$ 227,686
Operating Loss Carryforwards Indefinite	30,000
Undistributed Earnings of Foreign Subsidiaries	30,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	1,700
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	776,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	198,000
Foreign Tax Authority [Member] \| State Administration of Taxation, China [Member]
Operating Loss Carryforwards, Total	$ 21,800

Note 13 - Income Taxes - Income (Loss) Before Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
U.S.	$ (24,289)	$ (100,341)
Foreign	57,430	67,404
Total	$ 33,141	$ (32,937)

Note 13 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Federal	$ 1,246	$ 374
Foreign	4,399	592
Total current	5,645	966
Federal	1,588	(1,086)
Foreign	(853)	(41)
Total deferred	735	(1,127)
Income tax (benefit) expense	$ 6,380	$ (161)

Note 13 - Income Taxes - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statutory federal income tax rate	(21.00%)	(31.00%)
Federal rate change		351.00%
Deemed dividend and dividends paid		7.00%
Foreign income tax rate differential	4.00%	(62.00%)
Reversal of uncertain tax benefits		(3.00%)
True-up of NOLs	(60.00%)	11.00%
GILTI	37.00%
Other	3.00%	(5.00%)
Valuation allowance	92.00%	(268.00%)
Effective income tax rate	(19.00%)

Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Net operating loss carryforwards	$ 181,657	$ 210,194
Research and development and other tax credit carryforwards	13,046	12,828
Accruals and reserves	14,781	22,406
Fixed assets and intangible assets	1,553	1,568
Other	2,785	12,996
Gross deferred tax assets	213,822	259,992
Valuation allowance	(196,340)	(227,686)
Total deferred tax assets	17,482	32,306
Intercompany Debt	(16,028)	(29,130)
Other	(1,794)	(2,744)
Total deferred tax liabilities	(17,822)	(31,874)
Net deferred tax liabilities	$ (340)
Net deferred tax asset		$ 432

Note 14 - Stockholders' Equity (Details Textual) - USD ($)		12 Months Ended
	May 10, 2017	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value		$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		532,053
Share-based Payment Arrangement, Expense		$ 3,030,000	2,692,000
Proceeds from Issuance or Sale of Equity, Total			17,000,000
Over-Allotment Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	30 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	600,000
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		367,507
The 2007 Director Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		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		77,587
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		239,954
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
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		0
Share-based Payment Arrangement, Expense		$ 221,000	227,000
Share-based Payment Arrangement, Option [Member] \| The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Share-based Payment Arrangement, Option [Member] \| The 2007 Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Payment Arrangement, Option [Member] \| The 2007 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		5 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value		$ 3,600,000	3,300,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 2,600,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		1 year 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 2,600,000	1,400,000
Share-based Payment Arrangement, Expense		$ 2,781,000	$ 2,434,000
Restricted Stock [Member] \| The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		57,000	267,125

Note 14 - Stockholders' Equity - Options Activities (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Outstanding, options (in shares)	280,891
Outstanding, weighted-average exercise price (in dollars per share)	$ 69.51
Outstanding, aggregate intrinsic value	$ 0	$ 0
Canceled/forfeited, options (in shares)	(116,626)
Canceled/forfeited, weighted-average exercise price (in dollars per share)	$ 31.76
Outstanding, options (in shares)	164,265
Outstanding, weighted-average exercise price (in dollars per share)	$ 96.30
Outstanding, weighted-average remaining contractual term (Year)	3 years 36 days
Exercisable, options (in shares)	164,265
Exercisable, weighted-average exercise price (in dollars per share)	$ 96.30
Exercisable, weighted-average remaining contractual term (Year)	3 years
Fully vested and expected to vest, options (in shares)	164,265
Fully vested and expected to vest, weighted-average exercise price (in dollars per share)	$ 96.30
Fully vested and expected to vest, weighted-average remaining contractual term (Year)	3 years 36 days
Fully vested and expected to vest, aggregate intrinsic value

Note 14 - Stockholders' Equity - Restricted Stock Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2019 USD ($) $ / shares shares
Outstanding, restricted stock (in shares) \| shares	896,486
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 4.65
Granted, restricted stock (in shares) \| shares	532,053
Granted, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 6.90
Vested, restricted stock (in shares) \| shares	(405,802)
Vested, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 6.10
Forfeited, restricted stock (in shares) \| shares	(68,789)
Forfeited, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 5.04
Outstanding, restricted stock (in shares) \| shares	953,948
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 5.26
Outstanding, restricted stock, intrinsic aggregate value \| $	$ 12,268

Note 15 - Commitments and Contingencies - Schedule of Minimum Future Lease Commitments (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2020	$ 1,121
2021	894
2022	648
2023	416
2024	65
Total	$ 3,144

Note 17 - Restructuring (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Apr. 04, 2017	Mar. 31, 2019	Mar. 31, 2018
Restructuring Charges, Total		$ 450	$ 1,527
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent	8.00%
Employee Severance [Member]
Restructuring Charges, Total			1,300
Employee Severance [Member] \| Former Executive Officer [Member]
Restructuring Charges, Total			$ 500
Restructuring and Related Costs, Period of Post-employment Salary	1 year 180 days

Note 17 - Restructuring - Restructuring Charges and Cash Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accrued restructuring balance, beginning	$ 435
Restructuring Charges, Total	450	1,527
Cash payments	(885)	(1,092)
Accrued restructuring balance, ending		435
Charges to operations	450	1,527
Cash payments	(885)	(1,092)
Employee Severance Pay and Benefits [Member]
Accrued restructuring balance, beginning	262
Restructuring Charges, Total		1,325
Cash payments	(262)	(1,063)
Accrued restructuring balance, ending		262
Charges to operations		1,325
Cash payments	(262)	(1,063)
Facility Exit and Relocation Costs [Member]
Accrued restructuring balance, beginning	173
Restructuring Charges, Total	450	202
Cash payments	(623)	(29)
Accrued restructuring balance, ending		173
Charges to operations	450	202
Cash payments	$ (623)	$ (29)

Note 18 - Business Segments (Details Textual) $ in Thousands	12 Months Ended
	Mar. 31, 2019 USD ($) MWh	Mar. 31, 2018 USD ($)
Number of Reportable Segments	2	2
Share-based Payment Arrangement, Expense	$ 3,030	$ 2,692
Restructuring Charges, Total	450	1,527
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		71
Corporate, Non-Segment [Member]
Share-based Payment Arrangement, Expense	3,000	2,700
Restructuring Charges, Total	$ 500	$ 1,500
Minimum [Member]
Power of Wind Turbines \| MWh	2

Note 18 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues	$ 56,207	$ 48,403
Operating profit (loss)	34,023	(32,157)
Corporate, Non-Segment [Member]
Operating profit (loss)	(3,480)	(4,290)
Grid [Member]
Revenues	34,290	34,109
Grid [Member] \| Operating Segments [Member]
Operating profit (loss)	(10,600)	(18,963)
Wind [Member]
Revenues	21,917	14,294
Wind [Member] \| Operating Segments [Member]
Operating profit (loss)	$ 48,103	$ (8,904)

Note 18 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment, Net	$ 8,972	$ 12,513
North America [Member]
Property, Plant and Equipment, Net	8,555	11,933
Europe [Member]
Property, Plant and Equipment, Net	345	478
Asia Pacific [Member]
Property, Plant and Equipment, Net	$ 72	$ 102

Note 19 - Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Apr. 01, 2019	Mar. 31, 2019	Apr. 01, 2018
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 33
Accounting Standards Update 2016-02 [Member] \| Subsequent Event [Member] \| Minimum [Member]
Operating Lease, Right-of-Use Asset	$ 3,000
Operating Lease, Liability, Total	3,000
Accounting Standards Update 2016-02 [Member] \| Subsequent Event [Member] \| Maximum [Member]
Operating Lease, Right-of-Use Asset	5,000
Operating Lease, Liability, Total	$ 5,000
Accounting Standards Update 2017-05 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 100

Note 16 - Employee Benefit Plans	12 Months Ended
Note 16 - Employee Benefit Plans	Mar. 31, 2019
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	16. Employee Benefit Plans The Company has implemented a defined contribution plan (the “Plan”) under Section 401 (k) of the Internal Revenue Code. 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, 2019, and $0.4 million for the fiscal year ended March 31, 2018, and recorded corresponding charges to additional paid-in capital related to this program.

Note 20 - Subsequent Events	12 Months Ended
Note 20 - Subsequent Events	Mar. 31, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	20. 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 there are no such events to report.

Note 4 - Acquisition and Related Goodwill - Assets Acquiredand Liabilities Assumed Recognized (Details) (Parentheticals) - Infinia Technology Corporation (ITC) [Member]	Sep. 25, 2017 $ / shares shares
Equity, shares (in shares) \| shares	884,890
Equity, price per share (in dollars per share) \| $ / shares	$ 4.02

Note 7 - Inventory (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Inventory Write-down	$ 878	$ 434

Note 9 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Depreciation, Depletion and Amortization, Total	$ 4.3	$ 11.0
Change in Accounting Method Accounted for as Change in Estimate [Member]
Depreciation, Depletion and Amortization, Total		$ 4.9

Note 5 - Fair Value Measurements - Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Beginning balance	$ 1,217
Ending balance	4,942	$ 1,217
Fair Value, Recurring [Member] \| Warrant [Member]
Beginning balance	1,217	1,923
Mark to market adjustment	3,725	(706)
Ending balance	$ 4,942	$ 1,217

Note 10 - Intangible Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Amortization of Intangible Assets, Total	$ 0.3	$ 0.5

Note 11 - Accounts Payable and Accrued Expenses (Details Textual)	12 Months Ended
	Mar. 31, 2019
Minimum [Member]
Extended Warranty Trigger Period	1 year
Maximum [Member]
Extended Warranty Trigger Period	3 years

Note 16 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
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	$ 0.4