0001437749-21-001877 | 10-Q | XBRL Viewer | American Superconductor Corp DE

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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Dec. 31, 2020	Feb. 01, 2021
Document Information [Line Items]
Entity Registrant Name	AMERICAN SUPERCONDUCTOR CORP /DE/
Entity Central Index Key	0000880807
Trading Symbol	amsc
Current Fiscal Year End Date	--03-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		27,581,625
Entity Shell Company	false
Document Type	10-Q
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Title of 12(b) Security	Common Stock, par value $0.01 per share

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 67,909	$ 24,699
Marketable securities	10,239	30,149
Accounts receivable, net	12,083	16,987
Inventory, net	14,176	18,975
Prepaid expenses and other current assets	4,634	2,959
Restricted cash	629	508
Total current assets	109,670	94,277
Marketable securities		5,046
Property, plant and equipment, net	9,547	8,565
Intangibles, net	9,964	3,550
Right-of-use assets	3,806	3,359
Goodwill	34,659	1,719
Restricted cash	5,604	5,657
Deferred tax assets	1,386	1,551
Other assets	411	385
Total assets	175,047	124,109
Current liabilities:
Accounts payable and accrued expenses	17,015	22,091
Lease liability, current portion	581	439
Derivative liabilities	6,730
Deferred revenue, current portion	15,683	18,430
Total current liabilities	40,009	40,960
Deferred revenue, long term portion	8,695	7,712
Lease liability, long term portion	3,329	3,000
Deferred tax liabilities	70	180
Other liabilities	26	38
Total liabilities	52,129	51,890
Commitments and Contingencies (Note 15)
Stockholders' equity:
Common stock	280	229
Additional paid-in capital	1,120,333	1,053,507
Treasury stock	(3,593)	(2,666)
Accumulated other comprehensive loss	(405)	(216)
Accumulated deficit	(993,697)	(978,635)
Total stockholders' equity	122,918	72,219
Total liabilities and stockholders' equity	$ 175,047	$ 124,109

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 23,632	$ 17,915	$ 65,961	$ 45,697
Cost of revenues	19,676	16,329	51,444	38,770
Gross margin	3,956	1,586	14,517	6,927
Operating expenses:
Research and development	3,029	2,049	8,248	6,920
Selling, general and administrative	7,085	6,071	18,609	16,726
Amortization of acquisition-related intangibles	360	85	601	255
Change in fair value of contingent consideration	2,740		2,740
Total operating expenses	13,214	8,205	30,198	23,901
Operating loss	(9,258)	(6,619)	(15,681)	(16,974)
Change in fair value of warrants		556		4,648
Interest income, net	53	262	373	1,101
Other (expense)/income, net	(274)	(932)	(920)	45
Loss before income tax expense (benefit)	(9,479)	(6,733)	(16,228)	(11,180)
Income tax expense (benefit)	(1,546)	112	(1,166)	29
Net loss	$ (7,933)	$ (6,845)	$ (15,062)	$ (11,209)
Net loss per common share
Basic (in dollars per share)	$ (0.31)	$ (0.32)	$ (0.65)	$ (0.54)
Diluted (in dollars per share)	$ (0.31)	$ (0.35)	$ (0.65)	$ (0.75)
Weighted average number of common shares outstanding
Basic (in shares)	25,470	21,185	23,011	20,786
Diluted (in shares)	25,470	21,203	23,011	20,894

Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (7,933)	$ (6,845)	$ (15,062)	$ (11,209)
Other comprehensive (loss) income, net of tax:
Cumulative translation adjustment	(143)	609	(189)	(242)
Total other comprehensive (loss) income, net of tax	(142)	609	(189)	(242)
Comprehensive loss	$ (8,075)	$ (6,236)	$ (15,251)	$ (11,451)

- Definition

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

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+ Details

Unaudited 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, 2019	21,652
Balance at Mar. 31, 2019	$ 216	$ 1,044,622	$ (2,101)	$ (5)	$ (961,539)	$ 81,193
Issuance of common stock - restricted shares, net of forfeitures (in shares)	174
Issuance of common stock - restricted shares, net of forfeitures	$ 2	(2)
Stock-based compensation expense		249				249
Issuance of stock for 401(k) match (in shares)	8
Issuance of stock for 401(k) match		81				81
Repurchase of treasury stock			(283)			(283)
Cumulative translation adjustment				418		418
Net loss					(3,539)	(3,539)
Issuance of common stock - warrant exercise (in shares)	23
Issuance of common stock - warrant exercise		294				294
Balance (in shares) at Jun. 30, 2019	21,857
Balance at Jun. 30, 2019	$ 218	1,045,244	(2,384)	413	(965,078)	78,413
Cumulative translation adjustment				418		418
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 translation adjustment						(242)
Net loss						(11,209)
Balance (in shares) at Dec. 31, 2019	22,855
Balance at Dec. 31, 2019	$ 228	1,052,621	(2,666)	(247)	(972,748)	77,188
Cumulative translation adjustment						(242)
Balance (in shares) at Jun. 30, 2019	21,857
Balance at Jun. 30, 2019	$ 218	1,045,244	(2,384)	413	(965,078)	78,413
Issuance of common stock - restricted shares, net of forfeitures (in shares)	10
Issuance of common stock - restricted shares, net of forfeitures
Stock-based compensation expense		397				397
Issuance of stock for 401(k) match (in shares)	12
Issuance of stock for 401(k) match		92				92
Repurchase of treasury stock			(222)			(222)
Cumulative translation adjustment				(1,269)		(1,269)
Net loss					(825)	(825)
Issuance of common stock - ESPP (in shares)	15
Issuance of common stock - ESPP		100				100
Balance (in shares) at Sep. 30, 2019	21,894
Balance at Sep. 30, 2019	$ 218	1,045,833	(2,606)	(856)	(965,903)	76,686
Cumulative translation adjustment				(1,269)		(1,269)
Issuance of common stock - restricted shares, net of forfeitures (in shares)	167
Issuance of common stock - restricted shares, net of forfeitures	$ 2	(2)
Stock-based compensation expense		590				590
Issuance of stock for 401(k) match (in shares)	8
Issuance of stock for 401(k) match		69				69
Repurchase of treasury stock			(60)			(60)
Cumulative translation adjustment				609		609
Net loss					(6,845)	(6,845)
Issuance of common stock - warrant exercise (in shares)	786
Issuance of common stock - warrant exercise	$ 8	6,131				6,139
Balance (in shares) at Dec. 31, 2019	22,855
Balance at Dec. 31, 2019	$ 228	1,052,621	(2,666)	(247)	(972,748)	77,188
Cumulative translation adjustment				609		609
Balance (in shares) at Mar. 31, 2020	22,902
Balance at Mar. 31, 2020	$ 229	1,053,507	(2,666)	(216)	(978,635)	72,219
Issuance of common stock - restricted shares, net of forfeitures (in shares)	493
Issuance of common stock - restricted shares, net of forfeitures	$ 5	(5)
Stock-based compensation expense		909				909
Issuance of stock for 401(k) match (in shares)	13
Issuance of stock for 401(k) match		88				88
Repurchase of treasury stock			(377)			(377)
Cumulative translation adjustment				(3)		(3)
Net loss					(3,417)	(3,417)
Balance (in shares) at Jun. 30, 2020	23,408
Balance at Jun. 30, 2020	$ 234	1,054,499	(3,043)	(219)	(982,052)	69,419
Cumulative translation adjustment				(3)		(3)
Balance (in shares) at Mar. 31, 2020	22,902
Balance at Mar. 31, 2020	$ 229	1,053,507	(2,666)	(216)	(978,635)	72,219
Cumulative translation adjustment						(189)
Net loss						(15,062)
Balance (in shares) at Dec. 31, 2020	27,975
Balance at Dec. 31, 2020	$ 280	1,120,333	(3,593)	(405)	(993,697)	122,918
Cumulative translation adjustment						(189)
Balance (in shares) at Jun. 30, 2020	23,408
Balance at Jun. 30, 2020	$ 234	1,054,499	(3,043)	(219)	(982,052)	69,419
Issuance of common stock - restricted shares, net of forfeitures (in shares)	33
Issuance of common stock - restricted shares, net of forfeitures
Stock-based compensation expense		849				849
Issuance of stock for 401(k) match (in shares)	9
Issuance of stock for 401(k) match		101				101
Repurchase of treasury stock			(293)			(293)
Cumulative translation adjustment				(43)		(43)
Net loss					(3,712)	(3,712)
Issuance of common stock - ESPP (in shares)	8
Issuance of common stock - ESPP		99				99
Balance (in shares) at Sep. 30, 2020	23,458
Balance at Sep. 30, 2020	$ 234	1,055,548	(3,336)	(262)	(985,764)	66,420
Cumulative translation adjustment				(43)		(43)
Issuance of common stock - restricted shares, net of forfeitures (in shares)	(32)
Issuance of common stock - restricted shares, net of forfeitures
Stock-based compensation expense		839				839
Issuance of stock for 401(k) match (in shares)	5
Issuance of stock for 401(k) match		82				82
Repurchase of treasury stock			(257)			(257)
Cumulative translation adjustment				(143)		(143)
Net loss					(7,933)	(7,933)
Issuance of common stock - stock offering (in shares)	3,670
Issuance of common stock - stock offering	$ 37	51,440				51,477
Issuance of common stock - NEPSI acquisition (in shares)	874
Issuance of common stock - NEPSI acquisition	$ 9	12,424				12,433
Balance (in shares) at Dec. 31, 2020	27,975
Balance at Dec. 31, 2020	$ 280	1,120,333	(3,593)	(405)	(993,697)	122,918
Cumulative translation adjustment				$ (143)		$ (143)

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended			7 Months Ended	9 Months Ended
	Dec. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Oct. 26, 2019	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (7,933)	$ (3,417)	$ (3,539)	$ (11,209)	$ (15,062)	$ (11,209)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization				3,312	3,811
Stock-based compensation expense				1,236	2,597
Provision for excess and obsolete inventory	400			491	1,610	500
Deferred income taxes				(1,069)	(1,828)
Change in fair value of contingent consideration	2,740				2,740
Change in fair value of warrants				(4,648)		4,648
Non-cash interest income					(48)
Other non-cash items				(22)	291
Unrealized foreign exchange loss/(gain) on cash and cash equivalents				(209)	366
Changes in operating asset and liability accounts:
Accounts receivable				(8,661)	6,376
Inventory				(6,968)	7,419
Prepaid expenses and other assets				(332)	6
Accounts payable and accrued expenses				2,648	(7,894)
Deferred revenue				7,652	(5,255)
Net cash used in operating activities				(17,779)	(4,871)
Cash flows from investing activities:
Purchase of property, plant and equipment				(2,926)	(1,574)
Proceeds from the sale of property, plant and equipment				3,001	1
Purchase of marketable securities				(35,000)
Sale of marketable securities					25,006
Cash paid for acquisition					(26,000)
Change in other assets				37	(6)
Net cash used in investing activities				(34,888)	(2,573)
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards				(565)	(927)
Proceeds from exercise of warrants				6,139
Proceeds from public equity offering, net					51,477
Proceeds from exercise of employee stock options and ESPP				100	99
Net cash provided by financing activities				5,674	50,649
Effect of exchange rate changes on cash				30	73
Net increase/(decrease) in cash, cash equivalents and restricted cash				(46,963)	43,278
Cash, cash equivalents and restricted cash at beginning of period		$ 30,864	$ 78,198	78,198	30,864	$ 78,198
Cash, cash equivalents and restricted cash at end of period	74,142			31,235	74,142
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds				3,520	630
Non-cash investing and financing activities
Issuance of common stock to settle liabilities				242	271
Hercules [Member]
Non-cash investing and financing activities
Issuance of common stock				294
Northeast Power Systems, Inc (NEPSI) [Member]
Adjustments to reconcile net loss to net cash used in operations:
Change in fair value of contingent consideration	$ 2,700				2,700
Non-cash investing and financing activities
Issuance of common stock					$ 12,433

Note 1 - Nature of the Business and Operations and Liquidity	9 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Nature of the Business and Operations and Liquidity Nature of the Business and Operations American Superconductor Corporation (together with its subsidiaries, “AMSC®” or the “Company”) was founded on April 9, 1987. The Company is a leading system provider of megawatt-scale power resiliency solutions that Orchestrate the Rhythm and Harmony of Power on the Grid ™ and that protect and expand the capability of the Navy's fleet. The Company's system level products leverage its proprietary “smart materials” and “smart software and controls” to provide enhanced resiliency and improved performance of megawatt-scale power flow. These unaudited condensed consolidated financial statements of the Company 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 -Q. 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. Certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the results for the interim periods ended December 31, 2020 and 2019 and the financial position at December 31, 2020 ; however, these results are not necessarily indicative of results which may be expected for the full year. The interim condensed consolidated financial statements, and notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended March 31, 2020 , and notes thereto, included in the Company's Annual Report on Form 10 -K for the year ended March 31, 2020 filed with the SEC on June 2, 2020. Liquidity The Company has historically experienced recurring operating losses and as of December 31, 2020 , the Company had an accumulated deficit of $ 993.7 million. In addition, the Company has historically experienced recurring negative operating cash flows. At December 31, 2020 , the Company had cash, cash equivalents, and marketable securities of $ 78.1 million. Marketable securities include certificate of deposits with maturities between three and nine months. Cash used in operations for the nine months ended December 31, 2020 was $ 4.9 million. 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 ("ECS") to Inox and a license agreement allowing Inox to manufacture a limited number of ECS. After Inox purchases the specified number of ECS 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 ECS requirements for an additional three -year period. Pursuant to these strategic agreements, Inox must forecast future purchase orders of sets of ECS which become firm orders three months prior to shipment, and Inox must post letters of credit before the Company will ship such orders. Inox had been delinquent on its obligation to post letters of credit for sets of ECS that Inox forecasted to purchase under the terms of the supply contract. On May 29, 2020, the Company sent written notice to Inox notifying Inox of its default under the supply contract due to Inox's failure to post letters of credit in the amount of €6.0 million for the payment of ECS that Inox is obligated to purchase under the terms of the supply contract. If Inox failed to post letters of credit in the amount of €6.0 million in accordance with the terms of the supply contract within the ninety day cure period after receipt of the default notice, then the Company could have terminated the supply contract by providing written notice of such termination to Inox. On September 2, 2020, Inox delivered approved letters of credit in the amount of €1.3 million for the payment of a portion of the ECS that Inox was obligated to purchase under the terms of the supply contract. On September 11, 2020, the Company notified Inox that due to (i) the Company's business relationship with Inox, and (ii) Inox's delivery of approved letters of credit in the amount of €1.3 million as described above, the Company gave Inox until October 5, 2020 to regain compliance with the terms of the supply contract by providing approved letters of credit in the amount of €4.7 million for payment of the remaining ECS that Inox currently was obligated to purchase under the terms of the supply contract. On October 1, 2020, Inox delivered approved letters of credit for payment of the remaining ECS that Inox was obligated to purchase under the terms of the supply contract and cured the default set forth in the May 29, 2020 default notice. On October 1, 2020 ( the "Acquisition Date"), the Company entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with the selling stockholders named therein. Pursuant to the terms of the Stock Purchase Agreement and concurrently with entering into such agreement, the Company acquired all of the issued and outstanding (i) shares of capital stock of Northeast Power Systems, Inc., a New York corporation (“NEPSI”), and (ii) membership interests of Northeast Power Realty, LLC, a New York limited liability company, which holds the real property that serves as NEPSI's headquarters (the "Acquisition"). NEPSI is a U.S.-based global provider of medium-voltage metal-enclosed power capacitor banks and harmonic filter banks for use on electric power systems. NEPSI is now a wholly-owned subsidiary of the Company and is operated by its Grid business unit. The purchase price was $26.0 million in cash and 873,657 restricted shares of common stock of the Company. As part of the transaction, the selling stockholders may receive up to an additional 1,000,000 shares of common stock of the Company upon the achievement of certain specified revenue objectives in the future. On October 22, 2020, the Company entered into an underwriting agreement with Oppenheimer & Co. Inc., as representative of the several underwriters named therein, relating to the issuance and sale (the “Offering”) of 3,670,000 shares of the Company's common stock at a public offering price of $15.00 per share. The net proceeds to the Company from the Offering were approximately $51.5 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Offering closed on October 26, 2020. In addition, the Company had granted the underwriters a 30 -day option to purchase up to an additional 550,500 shares of common stock at the public offering price which was not exercised. In March 2020, the World Health Organization declared the disease caused by the novel coronavirus, COVID- 19, to be a pandemic. COVID- 19 has spread throughout the globe, including in the Commonwealth of Massachusetts where the Company's headquarters are located, and in other areas where the Company has business operations. In response to the outbreak, the Company has followed the guidelines of the U.S. Centers for Disease Control and Prevention and applicable state government authorities to protect the health and safety of the Company's employees, families, suppliers, customers and communities. While these existing measures and, COVID- 19 generally, have not materially disrupted the Company's business to date, any future actions necessitated by the COVID- 19 pandemic may result in disruption to the Company's business. While the COVID- 19 pandemic continues to rapidly evolve, the Company continues to assess the impact of the COVID- 19 pandemic to best mitigate risk and continue the operations of the Company's business. The extent to which the outbreak impacts the Company's business, liquidity, results of operations and financial condition will depend on future developments, which are highly uncertain and cannot be predicted with confidence, including new information that may emerge concerning the severity of the COVID- 19 pandemic and the actions to contain it or treat its impact, among others. If the Company, its customers or suppliers experience prolonged shutdowns or other business disruptions, the Company's business, liquidity, results of operations and financial condition are likely to be materially adversely affected, and the Company's ability to access the capital markets may be limited. The Company believes that based on the information presented above and its quarterly 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 nine months ended December 31, 2020 . The Company's liquidity is highly dependent on its ability to increase revenues, including its ability to collect revenues under its agreements with Inox, its ability to control its operating costs, and its ability to raise additional capital, if necessary. The impact of the COVID- 19 pandemic on the global financing markets may reduce the Company's ability to raise additional capital, if necessary, which could negatively impact the Company's liquidity. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

Note 2 - NEPSI Acquisitions

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Business Combination Disclosure [Text Block]

NEPSI Acquisition

Acquisition of NEPSI

As described in Note

Nature of the Business and Operations and Liquidity, on the Acquisition Date, the Company acquired all of the issued and outstanding shares of capital stock of NEPSI and membership interests of Northeast Power Realty, LLC, a New York limited liability company, which holds the real property that serves as NEPSI's headquarters. NEPSI is a U.S.-based global provider of medium-voltage metal-enclosed power capacitor banks and harmonic filter banks for use on electric power systems. Prior to the Acquisition, the Company had purchased

$0.4

million of products from NEPSI in fiscal year

2019

for which NEPSI was paid and had recorded revenue.

Pursuant to the Stock Purchase Agreement, the Company acquired all of the issued and outstanding shares of NEPSI, and membership interest in the realty entity, for which the Company paid

$26.0

million in cash and issued

873,657

restricted shares of the Company's common stock. Additionally, the Company

may

issue to the selling stockholders up to an additional

1,000,000

shares of common stock upon NEPSI's achievement of specified revenue objectives during varying periods of up to

four

years following closing of the Acquisition. This contingent consideration is recorded as a derivative liability based on a Monte Carlo simulation to determine fair value at the time of issuance. NEPSI is now a wholly-owned subsidiary of the Company and is operated and reported as a component of its Grid business unit.

The Acquisition completed by the Company during the

nine

months ended

December 31, 2020

has been accounted for under the purchase method of accounting in accordance with ASC

805,

Business Combinations

. 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 has been recorded as goodwill. As NEPSI was previously a private company, the adoption of Accounting Standards Codification ("ASC

606"

) was completed as part of the Acquisition. See Note

"Revenue Recognition" for further details. There were

leases acquired and the Acquisition had

impact to the Company's reporting under ASC

842.

The total purchase price of approximately

$42.4

million includes the fair value of shares of the Company's common stock issued at closing, cash paid, and contingent consideration as follows (in millions):

Cash payment	$	26.0
Issuance of 873,657 shares of Company's common stock		12.4
Contingent consideration		4.0
Total consideration		42.4

At the Acquisition Date, in addition to the

$26.0

million cash, the Company valued the Company's common stock, using

$14.23

per share, which was the closing price on the day that the Company acquired NEPSI and

$4.0

million of contingent consideration for the earnout liability valued as of the Acquisition Date. Acquisition costs of

$0.3

million were recorded in selling, general and administrative ("SG&A") costs for the

three

and

nine

months ended

December 31, 2020

The fair value of the contingent consideration was determined using a Monte Carlo model and is accounted for as a derivative liability which is revalued at the fair value determined at each subsequent balance sheet date until the contingencies are resolved and the shares to be issued are determined, with the change in fair value recorded in the current period operating loss or (income). See Note

13,

"Warrants and Derivative Liabilities" for further details and a summary of key assumptions used to determine fair value in each period.

The following table summarizes the allocation of the purchase price based on the estimated fair values of the assets acquired and liabilities assumed and related deferred income taxes in connection with the Acquisition (in millions):

Net working capital (excluding inventory and deferred revenue)	$	0.1
Inventory		4.2
Property, plant and equipment		2.3
Deferred revenue		(2.7	)
Deferred tax liability		(1.7	)
Net tangible assets/(liabilities)		2.2

Backlog		0.6
Trade names and trademarks		0.6
Customer relationships		6.1
Net identifiable intangible assets/(liabilities)		7.3

Goodwill		32.9

Total purchase consideration	$	42.4

Inventory includes a

$1.0

million adjustment to step up the inventory balance to fair value consistent with the purchase price allocation. The fair value was determined based on the estimated selling price of the inventory, less the remaining manufacturing and selling cost and a normal profit margin on those manufacturing and selling efforts. The

$1.0

million step up adjustment increased cost of revenue in the

three

and

nine

months periods ended

December 31, 2020

as the inventory was sold. This increase is

not

reflected in the pro forma condensed combined statements of operations because it does

not

have a continuing impact beyond the

first

year.

Backlog of

$0.6

million was evaluated using the multi period excess earnings method under the income approach. The contracts with customers do

not

provide for any guarantees to source all future requirements from the Company. The amortization method being utilized is economic consumption estimated over a

two

year period with the expense being allocated to cost of revenues.

Customer relationships of

$6.1

million relates to customers currently under contract and was determined based on a multi period excess earnings method under the income approach. The method of amortization being utilized is the economic consumption over

years with the expense being allocated to SG&A.

Trade names and trademarks of

$0.6

million were reviewed, using the assumption that the Company would continue to utilize the NEPSI trade name indefinitely. The relief from royalty method was utilized using an

royalty rate on revenues with a

13%

discount rate over

years.

Goodwill represents the value associated with the acquired workforce and expected synergies related to the business combination of the

two

companies. Goodwill resulting from the Acquisition was assigned to the Company's Grid segment. Goodwill recognized in the Acquisition is

not

deductible for tax purposes. This purchase price allocation is preliminary and has

not

been finalized as the analysis on the assets and liabilities acquired, primarily the tax related liability

may

require further adjustments to our purchase accounting that could result in a measurement period adjustment that would impact our reported net assets and goodwill as of

October 1, 2020.

Material changes, if any, to the preliminary allocation summarized above will be reported once the related uncertainties are resolved, but

later than

October 1, 2021.

The

$1.7

million of deferred tax liability is primarily related to inventory step up and intangibles.

Unaudited Pro Forma Operating Results

The unaudited pro forma condensed consolidated statement of operations for the

three

and

nine

months ended

December 31, 2020

and

2019

is presented as if the Acquisition had occurred on

April 1, 2019.

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Revenues	$	23,632		$	22,412		$	78,298		$	66,135
Operating loss		(8,769	)		(6,988	)		(15,016	)		(15,469	)
Net loss	$	(9,169	)	$	(7,117	)	$	(15,775	)	$	(7,879	)

Net loss per common share
Basic	$	(0.36	)	$	(0.32	)	$	(0.67	)	$	(0.36	)
Diluted	$	(0.36	)	$	(0.35	)	$	(0.67	)	$	(0.57	)
Shares - basic		25,470			22,059			23,594			21,660
Shares - diluted		25,470			22,077			23,594			21,768

The pro forma amounts include the historical operating results of the Company and NEPSI with appropriate adjustments that give effect to acquisition related costs, income taxes, intangible amortization resulting from the Acquisition and certain conforming accounting policies of the Company. The

three

and

nine

month periods ended

December 31, 2020

include

$2.7

million decrease in operating loss and net loss for the change in fair value on the contingent consideration. The pro forma amounts are

not

necessarily indicative of the operating results that would have occurred if the Acquisition and related transactions had been completed at the beginning of the applicable periods presented. In addition, the pro forma amounts are

not

necessarily indicative of operating results in future periods.

In the unaudited consolidated results for the

three

and

nine

months ended

December 31, 2020,

NEPSI's operations are included in the Company's consolidated results from the date of Acquisition of

October 1, 2020.

NEPSI contributed

$6.6

million of revenue and

$0.1

million in net income for the Company for the

three

and

nine

month periods ended

December 31, 2020.

Amortization expense of

$0.5

million is included in the

three

and

nine

months ended

December 31, 2020

as a result of the NEPSI acquired intangible assets. In addition,

$1.0

million for the step-up basis assigned to acquired inventory was charged to cost of revenues in the

three

and

nine

months ended

December 31, 2020.

Note 3 - Revenue Recognition

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

Revenue Recognition

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

five

-step model in accordance with ASC

606,

Revenue from Contracts with Customers

. 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. In the

three

and

nine

months ended

December 31, 2020

% and

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

three

and

nine

months ended

December 31, 2019

57%

and

69%,

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

Following the Acquisition of NEPSI, the Company evaluated all open NEPSI contracts at the date of the Acquisition against a

five

-step model in accordance with ASC

606

as NEPSI, as a private company, had deferred adopting

ASC606

prior to the Acquisition, as permitted. The Company identified

two

NEPSI revenue streams which are (

) the sale of its major components which falls under the equipment and systems product line and (

) the sale of spare parts, which falls under the service product line. Further details on each of these product lines can be found below. The Company does

not

expect a material impact to its consolidated statements of operations on an ongoing basis resulting from the adoption of the ASC

606

standard for the NEPSI business, and NEPSI revenue streams will follow the existing policies noted below.

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, which is primarily upon delivery, as the Company has determined that this is the point in time that control transfers to the customer.

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

not

meet the requirements of an exchange transaction and therefore do

not

fall within the scope of ASC

606.

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

not

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

606

by analogy to recognize grant revenue over time. In the

three

and

nine

months ended

December 31, 2020

, the Company recorded $

1.1

million and $

1.8

million in grant revenue, respectively, which is included in the Company's Grid segment revenue. In the

three

and

nine

months ended

December 31, 2019

, the Company recorded

$3.9

million and

$5.3

million in grant revenue, respectively, which is included in the Company's Grid segment revenue.

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 represent 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, 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. This transfer 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

not

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

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

one

three

years, and extended service-type warranties at the customer's 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

not

to 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:

	Three Months Ended December 31, 2020				Nine Months Ended December 31, 2020
Product Line:	Grid		Wind		Grid		Wind
Equipment and systems	$	15,930	$	6,153	$	47,729	$	12,828
Services and technology development		1,156		393		3,420		1,984
Total	$	17,086	$	6,546	$	51,149	$	14,812

Region:
Americas	$	13,394	$	14	$	39,626	$	56
Asia Pacific		351		6,461		6,736		14,463
EMEA		3,341		71		4,787		293
Total	$	17,086	$	6,546	$	51,149	$	14,812

	Three Months Ended December 31, 2019				Nine Months Ended December 31, 2019
Product Line:	Grid		Wind		Grid		Wind
Equipment and systems	$	14,040	$	2,160	$	32,438	$	7,742
Services and technology development		1,192		523		4,139		1,379
Total	$	15,232	$	2,683	$	36,577	$	9,120

Region:
Americas	$	10,164	$	2	$	28,663	$	49
Asia Pacific		330		2,647		2,550		8,968
EMEA		4,738		34		5,364		104
Total	$	15,232	$	2,683	$	36,577	$	9,120

As of

December 31, 2020

, and

2019

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

“Accounts Receivable” and Note

“Inventory” for a reconciliation to the condensed consolidated balance sheets) 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 Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2020	$	5,711		$	1,631		$	26,142
Increases for costs incurred to fulfill performance obligations		—			6,635			—
Increase for balances acquired		101			—			2,700
Increase (decrease) due to customer billings		(8,255	)		—			42,785
Decrease due to cost recognition on completed performance obligations		—			(6,969	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		6,644			—			(48,274	)
Other changes and FX impact		—			33			1,025
Ending balance as of December 31, 2020	$	4,201		$	1,330		$	24,378

	Unbilled Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2019	$	2,213		$	318		$	15,519
Increases for costs incurred to fulfill performance obligations		—			3,001			—
Increase (decrease) due to customer billings		(7,417	)		—			36,461
Decrease due to cost recognition on completed performance obligations		—			(2,221	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		9,820			—			(28,768	)
Other changes and FX impact		(3	)		(1	)		(69	)
Ending balance as of December 31, 2019	$	4,613		$	1,097		$	23,143

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

December 31, 2020

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

606

to be recognized in the next

twelve

months of approximately $

51.1

million. There are also approximately $

7.2

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

thirteen

sixty

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

twelve

-month performance obligations include anticipated shipments to Inox based on the

twelve

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

first

three

months of a

twelve

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

twelve

-month forecast provided by Inox 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

three

and

nine

months ended

December 31, 2020

and

2019

		Three Months Ended						Nine Months Ended
	Reportable	December 31,						December 31,
	Segment	2020			2019			2020			2019
Inox Wind Limited	Wind		24	%		<10%			12	%		11	%
Department of Homeland Security	Grid		<10%			22	%		<10%			12	%
Vestas	Grid		<10%			25	%		<10%			10	%
EPC Services	Grid		14	%		<10%			17	%		<10%

- Definition

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

+ References

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

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

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

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

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

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

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

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

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

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

+ Details

Note 4 - Stock-based Compensation

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

Stock-Based Compensation

The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the

three

and

nine

months ended

December 31, 2020

and

2019

(in thousands):

	Three Months Ended December 31,					Nine Months Ended December 31,
	2020			2019		2020		2019
Cost of revenues	$	(23	)	$	21	$	35	$	45
Research and development		179			117		470		219
Selling, general and administrative		683			452		2,092		971
Total	$	839		$	590	$	2,597	$	1,236

The Company issued

27,341

shares of immediately vested common stock and

697,167

shares of restricted stock awards during the

nine

months ended

December 31, 2020

and issued

13,174

shares of immediately vested common stock and

366,000

shares of restricted stock awards during the

nine

months ended

December 31, 2019

. These restricted stock awards generally vest over

years. Awards for restricted stock include both time-based and performance-based awards. For options and restricted stock awards that vest upon the passage of time, expense is being recorded over the vesting period. Performance-based awards are expensed over the requisite service period based on probability of achievement.

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

0.1

million at

December 31, 2020

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

0.4

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

5.2

million at

December 31, 2020

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

1.9

years.

The Company did

not

grant any stock options during the

nine

months ended

December 31, 2020

. The Company granted

5,939

stock options during the

nine

months ended

December 31, 2019

. The stock options granted during the

nine

months ended

December 31, 2019

will vest over

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

nine

months ended

December 31, 2019

are as follows:

Three Months Ended December 31,

Nine Months Ended December 31,

2020

2019

2020

2019

Expected volatility

N/A

66.5

Risk-free interest rate

N/A

1.8

Expected life (years)

N/A

5.91

Dividend yield

N/A

None

Note 5 - Computation of Net Loss Per Common Share

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Earnings Per Share [Text Block]

Computation of Net Loss per Common Share

Basic net loss per share (“EPS”) is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Where applicable, 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. Stock options and warrants that are out-of-the-money with exercise prices greater than the average market price of the underlying common shares and shares of performance based restricted stock where the contingency was

not

met are excluded from the computation of diluted EPS as the effect of their inclusion would be anti-dilutive. For the

three

and

nine

months ended

December 31, 2020

1.1

million shares were

not

included in the calculation of diluted EPS. Of these,

1.0

million relate to shares tied to the derivative liability for which the contingency has

not

yet been met, and

0.1

million relate to outstanding stock options as they were considered anti-dilutive

For the

three

and

nine

months ended

December 31, 2019

0.1

million shares related to outstanding stock options were

not

included in the calculation of diluted EPS as they were considered anti-dilutive.

The following table reconciles the numerators and denominators of the earnings per share calculation for the

three

and

nine

months ended

December 31, 2020

and

2019

(in thousands, except per share data):

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Numerator:
Net loss	$	(7,933	)	$	(6,845	)	$	(15,062	)	$	(11,209	)
Less: decrease in fair value of warrants, net of income tax		—			(556	)		—			(4,648	)
Plus: change in fair value due to exercise of warrants		—			—			—			83
Net loss - diluted	$	(7,933	)	$	(7,401	)	$	(15,062	)	$	(15,774	)
Denominator:
Weighted-average shares of common stock outstanding		26,532			22,110			24,143			21,729
Weighted-average shares subject to repurchase		(1,062	)		(925	)		(1,132	)		(943	)
Shares used in per-share calculation ― basic		25,470			21,185			23,011			20,786
Common stock warrants		—			18			—			108
Shares used in per-share calculation ― diluted		25,470			21,203			23,011			20,894
Net loss per share ― basic	$	(0.31	)	$	(0.32	)	$	(0.65	)	$	(0.54	)
Net loss per share ― diluted	$	(0.31	)	$	(0.35	)	$	(0.65	)	$	(0.75	)

For the

three

and

nine

months ended

December 31, 2019

, the diluted net loss per common share amounts under the treasury stock method were calculated based on the dilutive effect of the total number of shares of common stock related to the warrants issued to Hudson Bay Capital (the “Hudson Warrants”) for

818,181

shares with an exercise price of

$7.81.

For the

three

and

nine

month periods ended

December 31, 2019

, the average stock price was

$8.19

and

$9.29

respectively through

November 13, 2019

when the Hudson Warrant was partially exercised for

786,000

shares, providing

37,962

and

130,345

dilutive shares respectively. The increase of

$0.6

million and the decrease of

$4.6

million in the fair value of the warrant liability, respectively, is included in the net loss available to common shareholders for the diluted net loss per common share amount when the impact is dilutive.

Note 6 - Goodwill and Other Intangibles

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

Goodwill and Other Intangibles

Goodwill

The guidance under ASC

805

provides for the recognition of goodwill on the Acquisition Date measured as the excess of the aggregate consideration transferred over the net of the Acquisition Date amounts of net assets acquired and liabilities assumed. The Company's goodwill balance relates to the Acquisition of NEPSI in the current year and ITC in fiscal

2017

and is reported in the Grid business segment. The fair market value of the contingent consideration included in the total consideration transferred was determined using the Monte Carlo model, and all other consideration transferred was calculated using its observable fair market value. The tangible net assets acquired fair market value was based on observable market fair value. The acquired intangible asset fair value was determined using discounted cash flows under an excess in earnings model or relief in royalty method where appropriate.

Goodwill represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net assets when accounted for using the purchase method of accounting. Goodwill is

not

amortized but reviewed for impairment. Goodwill is reviewed annually and whenever events or changes in circumstances indicate that the carrying value of the goodwill might

not

be recoverable.

The following table provides a roll forward of the changes in our Grid business segment goodwill balance:

	Goodwill
March 31, 2020	$	1,719
NEPSI Acquisition		32,940
Less impairment loss		-
December 31, 2020	$	34,659

The Company did

not

identify any triggering events in the

three

and

nine

months ended

December 31, 2020

, that would require interim impairment testing of goodwill.

Other Intangibles

Intangible assets at

December 31, 2020

and

March 31, 2020

consisted of the following (in thousands):

	December 31, 2020							March 31, 2020
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Backlog	$	600	$	(285	)	$	315	$	—	$	—		$	—		2
Trade name		600		—			600		—		—			—		Indefinite
Customer relationships		6,100		(239	)		5,861		—		—			—		7
Core technology and know-how		5,970		(2,782	)		3,188		5,970		(2,420	)		3,550		5 - 10
Intangible assets	$	13,270	$	(3,306	)	$	9,964	$	5,970	$	(2,420	)	$	3,550

The Company recorded intangible amortization expense related to customer relationship and core technology and know-how of

$0.4

million and

$0.6

million in the

three

and

nine

months ended

December 31, 2020

, respectively, and

$0.1

and

$0.3

million for the

three

and

nine

months ended

December 31, 2019

, respectively. Additionally, in each of the

three

and

nine

months ended

December 31, 2020

the Company recorded

$0.3

million related to intangible amortization related to backlog that is reported in cost of revenues.

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

Years ended March 31,	Total
2021		826
2022		2,115
2023		1,808
2024		1,393
2025		1,077
Thereafter		2,145
Total	$	9,364

The Company's intangible assets relate entirely to the Grid business segment operations in the United States.

Note 7 - Fair Value Measurements

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Fair Value Disclosures [Text Block]

Fair Value Measurements

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

three

broad levels as follows:

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

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

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

The Company provides a gross presentation of activity within Level

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

and

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

to Level

or Level

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

not

have any transfers of assets and liabilities from Level

Level

or Level

of the fair value measurement hierarchy during the

nine

months ended

December 31, 2020

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

Valuation Techniques

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of

three

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

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

Marketable Securities

Marketable securities consist of certificates of deposit that are measured using such inputs as quoted prices and are classified within Level

of the valuation hierarchy. The Company determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such classification as of each balance sheet date. All marketable securities are considered available for sale and are carried at fair value. Changes in fair value are recorded to other income (expense), net. The Company recognized

change in the

three

months ended

December 31, 2020

and

$0.2

million in unrealized losses on marketable securities, which is recorded in other income (expense), net, for the

nine

months ended

December 31, 2020

and less than a

$0.1

million gain which was recognized during the

nine

months ended

December 31, 2020

upon the sale of

one

of the certificates of deposit. The Company did

not

recognize any gains or losses on marketable securities in the

three

and

nine

months ended

December 31, 2019

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

Contingent Consideration

Contingent consideration relates to the earnout payment set forth in the Stock Purchase Agreement that provides that the selling stockholders

may

receive up to an additional

1,000,000

shares of common stock of the Company upon the achievement of certain specified revenue objectives over varying periods of up to

four

years following the Acquisition Date. See Note

13,

"Warrants and Derivative Liabilities" and Note

“NEPSI Acquisition” for further discussion. The Company relied on a Monte Carlo method to determine the fair value of the contingent consideration on the Acquisition Date and will continue to revalue the fair value of the contingent consideration using the same method at each subsequent balance sheet date until the contingencies are resolved and the shares to be issued are determined, with the change in fair value recorded in the current period operating loss.

Warrants

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

November 2014

and issued warrants to purchase

58,823

shares of the Company's common stock in conjunction a Loan and Security Agreement with Hercules Technology Growth Capital, Inc. (“Hercules Warrants”). The Hercules Warrants were exercised on

April 8, 2019.

The Hudson Warrants were partially exercised on

November 13, 2019

and the remaining unexercised warrants expired on

November 13, 2019.

As of

December 31, 2020

, the Company has

remaining outstanding warrants.

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

of the valuation hierarchy. See Note

13,

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

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

December 31, 2020

and

March 31, 2020

(in thousands):

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2020:
Assets:
Cash equivalents	$	56,101	$	56,101	$	—	$	—
Marketable securities	$	10,239	$	10,239	$	—	$	—
Derivative liabilities:
Contingent consideration	$	6,730	$	—	$	—	$	6,730

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

The table below reflects the activity for the Company's derivative liability measured at fair value on a recurring basis (in thousands):

	Acquisition Contingent Consideration
April 1, 2020	$	-
Issuance of contingent consideration		3,990
Mark to market adjustment		2,740
Balance at December 31, 2020	$	6,730

- 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 - Accounts Receivable

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Accounts Receivable [Text Block]

Accounts Receivable

Accounts receivable at

December 31, 2020

and

March 31, 2020

consisted of the following (in thousands):

	December 31, 2020			March 31, 2020
Accounts receivable (billed)	$	7,897		$	11,276
Accounts receivable (unbilled)		4,201			5,711
Less: Allowance for doubtful accounts		(15	)		—
Accounts receivable, net	$	12,083		$	16,987

The Company recorded allowance for doubtful accounts of less than

$0.1

million for the

three

and

nine

months ended

December 31, 2020

and

allowance for the

three

and

nine

months ended

December 31, 2019

. The allowances are based on evaluation of customer accounts that are past due.

Note 9 - Inventory

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Inventory Disclosure [Text Block]

Inventory

Inventory, net of reserves, at

December 31, 2020

and

March 31, 2020

consisted of the following (in thousands):

	December 31, 2020		March 31, 2020
Raw materials	$	7,651	$	10,739
Work-in-process		3,497		1,345
Finished goods		1,698		5,260
Deferred program costs		1,330		1,631
Net inventory	$	14,176	$	18,975

The Company recorded inventory write-downs of $

0.4

million and

$0.3

million for the

three

months ended

December 31, 2020

and

2019

, respectively. The Company recorded inventory write-downs of $

1.6

million and

$0.5

million for the

nine

months ended

December 31, 2020

and

2019

, respectively. These write-downs were based on the Company's evaluation of its inventory on hand for excess quantities and obsolescence.

Deferred program costs as of

December 31, 2020

and

March 31, 2020

primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.

Note 10 - Property, Plant and Equipment

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

10.

Property, Plant and Equipment

The cost and accumulated depreciation of property, plant and equipment at

December 31, 2020

and

March 31, 2020

are as follows (in thousands):

	December 31, 2020			March 31, 2020
Construction in progress - equipment	$	111		$	3,130
Land		270			—
Building		1,630			—
Equipment and software		41,743			41,737
Furniture and fixtures		1,310			1,302
Leasehold improvements		6,306			2,477
Property, plant and equipment, gross		51,370			48,646
Less accumulated depreciation		(41,823	)		(40,081	)
Property, plant and equipment, net	$	9,547		$	8,565

Depreciation expense was $

1.2

million and

$1.0

million for the

three

months ended

December 31, 2020

and

2019

, respectively. Depreciation expense was $

2.9

million and

$3.1

million for the

nine

months ended

December 31, 2020

and

2019

, respectively. The decrease in construction in progress primarily relates to the completion of capital investments in the Company's HTS equipment and leasehold improvements in the Company's leased facilities in Westminster and Ayer, Massachusetts. The increase in land and building relates to the property added as part of the NEPSI Acquisition.

Note 11 - Accounts Payable and Accrued Expenses

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

11.

Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at

December 31, 2020

and

March 31, 2020

consisted of the following (in thousands):

	December 31, 2020		March 31, 2020
Accounts payable	$	3,664	$	10,045
Accrued inventories in-transit		1,131		763
Accrued other miscellaneous expenses		2,397		1,986
Advanced deposits		1,417		666
Accrued compensation		5,751		5,683
Income taxes payable		635		933
Accrued product warranty		2,020		2,015
Total	$	17,015	$	22,091

The Company generally provides a

one

three

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

Product warranty activity was as follows (in thousands):

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Balance at beginning of period	$	2,109		$	1,641		$	2,015		$	1,545
Acquired warranty obligations		147			—			147			—
Change in accruals for warranties during the period		124			93			507			247
Settlements during the period		(360	)		(28	)		(649	)		(86	)
Balance at end of period	$	2,020		$	1,706		$	2,020		$	1,706

Note 12 - Income Taxes	9 Months Ended
Note 12 - Income Taxes	Dec. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	12. Income Taxes The Company recorded an income tax benefit of $ 1.5 million and $ 1.2 million in the three and nine month periods ended December 31, 2020 , respectively. The Company recorded income tax expense of $0.1 million in the three months ended December 31, 2019 , and less than $0.1 million in the nine months ended December 31, 2019 . As a result of a difference in book and tax basis related to the intangible assets acquired in the Acquisition (see Note 2, "NEPSI Acquisition"), the Company recorded a deferred tax liability of $1.7 million. As a result, the Company was able to benefit from additional deferred tax assets and therefore released a corresponding valuation allowance of $1.7 million during the three and nine months ended December 31, 2020 . The purchase price allocation is preliminary and has not been finalized as the analysis on the assets and liabilities acquired, primarily the tax related liability, may require further adjustments to the Company's purchase accounting that could result in measurement period adjustments that would impact the Company's reported net assets and goodwill as of October 1, 2020. Material changes, if any, to the preliminary allocation summarized in Note 2, "NEPSI Acquisition" will be reported once the related uncertainties are resolved, but no later than October 1, 2021. Goodwill recognized in the Acquisition is not deductible for tax purposes. 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 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 to be realized upon ultimate settlement. The Company re-evaluates these uncertain tax positions on a quarterly basis. The 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 did not identify any uncertain tax positions in the nine months ended December 31, 2020 and did not have any gross unrecognized tax benefits as of March 31, 2020 .

- Definition

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

+ References + Details

Note 13 - Warrants and Derivative Liabilities

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Derivative Instruments and Hedging Activities Disclosure [Text Block]

13.

Warrants and Derivative Liabilities

Contingent Consideration

The Company evaluated the Acquisition earnout payment set forth in the Stock Purchase Agreement (see Note

"NEPSI Acquisition" for further details), which

may

require settlement in the Company's common stock, and determined the contingent consideration qualified for liability classification and derivative treatment under ASC

815,

Derivatives and Hedging

. As a result, for each period, the fair value of the contingent consideration will be remeasured and the resulting gain or loss will be recognized in operating expenses until the share amount is fixed.

Following is a summary of the key assumptions used in a Monte Carlo simulation to calculate the fair value of the contingent consideration related to the Acquisition:

	December 31,			October 1,
Fiscal Year 2020	2020			2020
Revenue risk premium		6.90	%		7.10	%
Revenue volatility		30	%		30	%
Stock Price	$	23.42		$	14.23
Payment delay (days)		80			—
Fair value	$6.7 million			$4.0 million

The Company recorded a net loss of $

2.7

million resulting from the increase in the fair value of the contingent consideration in both the

three

and

nine

months ended

December 31, 2020

Warrants

The Company accounted for its warrants as liabilities due to certain adjustment provisions within the instruments, which required that they be recorded at fair value. The warrants were subject to revaluation at each balance sheet date and any change in fair value was recorded as a change in fair value of warrants until the earlier of its expiration or its exercise at which time the warrant liability was 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. As of

December 31, 2020

, the Company had

remaining outstanding warrants.

Hercules Warrants

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 the Hercules Warrant which replaced the First Warrant and the Second Warrant. The Hercules Warrant was exercisable at any time after its issuance at an exercise price of

$7.85

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

May 2017,

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

September 2017

and sales of common stock under the ATM entered into in

January 2017.

This warrant had a fair value of

$0.4

million as of

March 31, 2019.

April 8, 2019,

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

22,821

shares of the Company's common stock on

April 17, 2019.

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

$0.1

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

nine

months ended

December 31, 2019

November 2014

Warrant

November 13, 2014,

the Company completed an offering of

909,090

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

one

share of the Company's common stock and

0.9

of a warrant to purchase

one

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

818,181

shares. The Hudson Warrants were exercisable at any time, at an exercise price equal to

$7.81

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

November 13, 2019,

Hudson partially exercised the Hudson Warrants for

786,000

restricted shares of Company common stock at

$7.81

per share

The remaining

32,181

warrants expired on

November 13, 2019.

The Company recorded net gains of

$0.5

million and

$4.6

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

three

and

nine

months ended

December 31, 2019

, respectively.

Note 14 - Leases

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Lessee, Operating Leases [Text Block]

14.

Leases

April 1, 2019,

the Company adopted ASU

2016

02,

Leases (Topic

842

)

("ASC

842"

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

not

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

not

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

not

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

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

one

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

five

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

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

twelve

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

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

third

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

The Company did

not

identify any leases that are classified as financing leases.

Supplemental balance sheet information related to leases at

December 31, 2020

and

March 31, 2020

are as follows:

	December 31, 2020			March 31, 2020
Operating Leases:
Right-of-use assets	$	3,806		$	3,359
Total right-of-use assets		3,806			3,359

Lease liabilities - ST	$	581		$	439
Lease liabilities - LT		3,329			3,000
Total operating lease liabilities		3,910			3,439

Weighted-average remaining lease term		6.04			6.91
Weighted-average discount rate		6.76	%		7.08	%

The costs related to the Company's leases for the

three

and

nine

months ended

December 31, 2020

and

2019

are as follows:

	Three Months Ended		Nine Months Ended
	December 31, 2020		December 31, 2020
Operating Leases:
Operating lease costs - fixed	$	226	$	618
Operating lease costs - variable		31		87
Short-term lease costs		338		989
Total lease costs		595		1,694

	Three Months Ended		Nine Months Ended
	December 31, 2019		December 31, 2019
Operating Leases:
Operating lease costs - fixed	$	179	$	535
Operating lease costs - variable		27		73
Short-term lease costs		164		378
Total lease costs		370		986

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

	Operating Leases
Year ended March 31,
2021	$	216
2022		814
2023		787
2024		733
2025		659
Thereafter		1,597
Total minimum lease payments		4,806
Less: interest		896
Present value of lease liabilities		3,910

Note 15 - Commitments and Contingencies	9 Months Ended
Note 15 - Commitments and Contingencies	Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	15. Commitments and Contingencies 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 December 31, 2020 , and March 31, 2020 , the Company had $ 5.6 million of restricted cash included in long-term assets and $ 0.6 million of restricted cash included in current assets, respectively. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts and long-term projects, including the irrevocable letter of credit in the amount of $5.0 million to secure certain of the Company's obligations under the Subcontract Agreement with ComEd. These deposits are held in interest bearing accounts.

Note 16 - Business Segments

9 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

16.

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 with exceptional efficiency, reliability, security and affordability through its transmission planning services, power electronics, and superconductor-based systems. The sales process is enabled by transmission planning services that allow it to identify power grid congestion, poor power quality and other risks, which helps the Company determine how its solutions can improve network performance. These services often lead to sales of grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems. The Company also sells ship protection products to the U.S. Navy through its Grid business segment.

Through the Company's wind power offerings, the Wind business segment enables manufacturers to field wind turbines with exceptional power output, reliability and affordability. The Company provides 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):

	Three Months Ended December 31,				Nine Months Ended December 31,
	2020		2019		2020		2019
Revenues:
Grid	$	17,086	$	15,232	$	51,149	$	36,577
Wind		6,546		2,683		14,812		9,120
Total	$	23,632	$	17,915	$	65,961	$	45,697

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Operating profit (loss):
Grid	$	(5,826	)	$	(3,732	)	$	(8,388	)	$	(9,723	)
Wind		147			(2,297	)		(1,956	)		(6,015	)
Unallocated corporate expenses		(3,579	)		(590	)		(5,337	)		(1,236	)
Total	$	(9,258	)	$	(6,619	)	$	(15,681	)	$	(16,974	)

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 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 consist primarily of loss on contingent consideration of

$2.7

million in both the

three

and

nine

months ended

December 31, 2020

. Additionally, unallocated corporate expenses consist of stock-based compensation expense of $

0.8

million and

$0.6

million in the

three

months ended

December 31, 2020

and

2019

, respectively, and $

2.6

million and

$1.2

million in the

nine

months ended

December 31, 2020

and

2019

, respectively.

Total assets for the

two

business segments as of

December 31, 2020

and

March 31, 2020

are as follows (in thousands):

	December 31, 2020		March 31, 2020
Grid	$	83,623	$	44,044
Wind		6,140		14,250
Corporate assets		85,284		65,815
Total	$	175,047	$	124,109

- Definition

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

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+ Details

Note 17 - Recent Accounting Pronouncements	9 Months Ended
Note 17 - Recent Accounting Pronouncements	Dec. 31, 2020
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	17. Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016 - 13, Financial Instruments-Credit Losses (Topic 326 ): Measurement of Credit Losses on Financial Instruments . The amendments in ASU 2016 - 13 will provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year. Following the release of ASU 2019 - 10 in November 2019, the new effective date, as long as the Company remains a smaller reporting company, would be annual reporting periods beginning after December 15, 2022. The Company is currently evaluating the impact, if any, that the adoption of ASU 2016 - 13 may have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018 - 13, Fair Value Measurement (Topic 820 ): Changes to the Disclosure Requirements for Fair Value Measurement . The amendments in ASU 2018 - 13 provide for increased effectiveness of the disclosures made around fair value measurements while including consideration for costs and benefits. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those periods. As of April 1, 2020, the Company has adopted ASU 2018 - 13 and noted no material impact on its consolidated financial statements. In December 2019, the FASB issued ASU 2019 - 12, Income Taxes (Topic 740 ): Simplifying the Accounting for Income Taxes . The amendments in ASU 2019 - 12 provide for simplified accounting to several income tax situations and removal of certain accounting exceptions. The ASU is effective for annual reporting periods beginning after December 15, 2020, including interim periods within those periods. The Company does not expect the impact of the adoption of ASU 2019 - 12 to be material to its consolidated financial statements.

- Definition

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

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+ Details

Note 18 - Subsequent Events	9 Months Ended
Note 18 - Subsequent Events	Dec. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	18. Subsequent Events The Company has performed an evaluation of subsequent events through the time of filing this Quarterly Report on Form 10 -Q with the SEC and has determined that there are no such events to report.

Note 2 - NEPSI Acquisitions (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Cash payment	$	26.0
Issuance of 873,657 shares of Company's common stock		12.4
Contingent consideration		4.0
Total consideration		42.4

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Net working capital (excluding inventory and deferred revenue)	$	0.1
Inventory		4.2
Property, plant and equipment		2.3
Deferred revenue		(2.7	)
Deferred tax liability		(1.7	)
Net tangible assets/(liabilities)		2.2

Backlog		0.6
Trade names and trademarks		0.6
Customer relationships		6.1
Net identifiable intangible assets/(liabilities)		7.3

Goodwill		32.9

Total purchase consideration	$	42.4

Business Acquisition, Pro Forma Information [Table Text Block]

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Revenues	$	23,632		$	22,412		$	78,298		$	66,135
Operating loss		(8,769	)		(6,988	)		(15,016	)		(15,469	)
Net loss	$	(9,169	)	$	(7,117	)	$	(15,775	)	$	(7,879	)

Net loss per common share
Basic	$	(0.36	)	$	(0.32	)	$	(0.67	)	$	(0.36	)
Diluted	$	(0.36	)	$	(0.35	)	$	(0.67	)	$	(0.57	)
Shares - basic		25,470			22,059			23,594			21,660
Shares - diluted		25,470			22,077			23,594			21,768

Note 3 - Revenue Recognition (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended December 31, 2020				Nine Months Ended December 31, 2020
Product Line:	Grid		Wind		Grid		Wind
Equipment and systems	$	15,930	$	6,153	$	47,729	$	12,828
Services and technology development		1,156		393		3,420		1,984
Total	$	17,086	$	6,546	$	51,149	$	14,812

Region:
Americas	$	13,394	$	14	$	39,626	$	56
Asia Pacific		351		6,461		6,736		14,463
EMEA		3,341		71		4,787		293
Total	$	17,086	$	6,546	$	51,149	$	14,812

	Three Months Ended December 31, 2019				Nine Months Ended December 31, 2019
Product Line:	Grid		Wind		Grid		Wind
Equipment and systems	$	14,040	$	2,160	$	32,438	$	7,742
Services and technology development		1,192		523		4,139		1,379
Total	$	15,232	$	2,683	$	36,577	$	9,120

Region:
Americas	$	10,164	$	2	$	28,663	$	49
Asia Pacific		330		2,647		2,550		8,968
EMEA		4,738		34		5,364		104
Total	$	15,232	$	2,683	$	36,577	$	9,120

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

	Unbilled Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2020	$	5,711		$	1,631		$	26,142
Increases for costs incurred to fulfill performance obligations		—			6,635			—
Increase for balances acquired		101			—			2,700
Increase (decrease) due to customer billings		(8,255	)		—			42,785
Decrease due to cost recognition on completed performance obligations		—			(6,969	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		6,644			—			(48,274	)
Other changes and FX impact		—			33			1,025
Ending balance as of December 31, 2020	$	4,201		$	1,330		$	24,378

	Unbilled Accounts Receivable			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2019	$	2,213		$	318		$	15,519
Increases for costs incurred to fulfill performance obligations		—			3,001			—
Increase (decrease) due to customer billings		(7,417	)		—			36,461
Decrease due to cost recognition on completed performance obligations		—			(2,221	)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations		9,820			—			(28,768	)
Other changes and FX impact		(3	)		(1	)		(69	)
Ending balance as of December 31, 2019	$	4,613		$	1,097		$	23,143

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

		Three Months Ended						Nine Months Ended
	Reportable	December 31,						December 31,
	Segment	2020			2019			2020			2019
Inox Wind Limited	Wind		24	%		<10%			12	%		11	%
Department of Homeland Security	Grid		<10%			22	%		<10%			12	%
Vestas	Grid		<10%			25	%		<10%			10	%
EPC Services	Grid		14	%		<10%			17	%		<10%

Note 4 - Stock-based Compensation (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

	Three Months Ended December 31,					Nine Months Ended December 31,
	2020			2019		2020		2019
Cost of revenues	$	(23	)	$	21	$	35	$	45
Research and development		179			117		470		219
Selling, general and administrative		683			452		2,092		971
Total	$	839		$	590	$	2,597	$	1,236

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

Three Months Ended December 31,

Nine Months Ended December 31,

2020

2019

2020

2019

Expected volatility

N/A

66.5

Risk-free interest rate

N/A

1.8

Expected life (years)

N/A

5.91

Dividend yield

N/A

None

Note 5 - Computation of Net Loss Per Common Share (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Numerator:
Net loss	$	(7,933	)	$	(6,845	)	$	(15,062	)	$	(11,209	)
Less: decrease in fair value of warrants, net of income tax		—			(556	)		—			(4,648	)
Plus: change in fair value due to exercise of warrants		—			—			—			83
Net loss - diluted	$	(7,933	)	$	(7,401	)	$	(15,062	)	$	(15,774	)
Denominator:
Weighted-average shares of common stock outstanding		26,532			22,110			24,143			21,729
Weighted-average shares subject to repurchase		(1,062	)		(925	)		(1,132	)		(943	)
Shares used in per-share calculation ― basic		25,470			21,185			23,011			20,786
Common stock warrants		—			18			—			108
Shares used in per-share calculation ― diluted		25,470			21,203			23,011			20,894
Net loss per share ― basic	$	(0.31	)	$	(0.32	)	$	(0.65	)	$	(0.54	)
Net loss per share ― diluted	$	(0.31	)	$	(0.35	)	$	(0.65	)	$	(0.75	)

Note 6 - Goodwill and Other Intangibles (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Goodwill [Table Text Block]

	Goodwill
March 31, 2020	$	1,719
NEPSI Acquisition		32,940
Less impairment loss		-
December 31, 2020	$	34,659

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

	December 31, 2020							March 31, 2020
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Backlog	$	600	$	(285	)	$	315	$	—	$	—		$	—		2
Trade name		600		—			600		—		—			—		Indefinite
Customer relationships		6,100		(239	)		5,861		—		—			—		7
Core technology and know-how		5,970		(2,782	)		3,188		5,970		(2,420	)		3,550		5 - 10
Intangible assets	$	13,270	$	(3,306	)	$	9,964	$	5,970	$	(2,420	)	$	3,550

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

Years ended March 31,	Total
2021		826
2022		2,115
2023		1,808
2024		1,393
2025		1,077
Thereafter		2,145
Total	$	9,364

Note 7 - Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2020:
Assets:
Cash equivalents	$	56,101	$	56,101	$	—	$	—
Marketable securities	$	10,239	$	10,239	$	—	$	—
Derivative liabilities:
Contingent consideration	$	6,730	$	—	$	—	$	6,730

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

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

	Acquisition Contingent Consideration
April 1, 2020	$	-
Issuance of contingent consideration		3,990
Mark to market adjustment		2,740
Balance at December 31, 2020	$	6,730

Note 8 - Accounts Receivable (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Accounts Receivable [Table Text Block]

	December 31, 2020			March 31, 2020
Accounts receivable (billed)	$	7,897		$	11,276
Accounts receivable (unbilled)		4,201			5,711
Less: Allowance for doubtful accounts		(15	)		—
Accounts receivable, net	$	12,083		$	16,987

Note 9 - Inventory (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31, 2020		March 31, 2020
Raw materials	$	7,651	$	10,739
Work-in-process		3,497		1,345
Finished goods		1,698		5,260
Deferred program costs		1,330		1,631
Net inventory	$	14,176	$	18,975

Note 10 - Property, Plant and Equipment (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31, 2020			March 31, 2020
Construction in progress - equipment	$	111		$	3,130
Land		270			—
Building		1,630			—
Equipment and software		41,743			41,737
Furniture and fixtures		1,310			1,302
Leasehold improvements		6,306			2,477
Property, plant and equipment, gross		51,370			48,646
Less accumulated depreciation		(41,823	)		(40,081	)
Property, plant and equipment, net	$	9,547		$	8,565

Note 11 - Accounts Payable and Accrued Expenses (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

	December 31, 2020		March 31, 2020
Accounts payable	$	3,664	$	10,045
Accrued inventories in-transit		1,131		763
Accrued other miscellaneous expenses		2,397		1,986
Advanced deposits		1,417		666
Accrued compensation		5,751		5,683
Income taxes payable		635		933
Accrued product warranty		2,020		2,015
Total	$	17,015	$	22,091

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Balance at beginning of period	$	2,109		$	1,641		$	2,015		$	1,545
Acquired warranty obligations		147			—			147			—
Change in accruals for warranties during the period		124			93			507			247
Settlements during the period		(360	)		(28	)		(649	)		(86	)
Balance at end of period	$	2,020		$	1,706		$	2,020		$	1,706

Note 13 - Warrants and Derivative Liabilities (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	December 31,			October 1,
Fiscal Year 2020	2020			2020
Revenue risk premium		6.90	%		7.10	%
Revenue volatility		30	%		30	%
Stock Price	$	23.42		$	14.23
Payment delay (days)		80			—
Fair value	$6.7 million			$4.0 million

Note 14 - Leases (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

Assets And Liabilities Lessee [Table Text Block]

	December 31, 2020			March 31, 2020
Operating Leases:
Right-of-use assets	$	3,806		$	3,359
Total right-of-use assets		3,806			3,359

Lease liabilities - ST	$	581		$	439
Lease liabilities - LT		3,329			3,000
Total operating lease liabilities		3,910			3,439

Weighted-average remaining lease term		6.04			6.91
Weighted-average discount rate		6.76	%		7.08	%

Lease, Cost [Table Text Block]

	Three Months Ended		Nine Months Ended
	December 31, 2020		December 31, 2020
Operating Leases:
Operating lease costs - fixed	$	226	$	618
Operating lease costs - variable		31		87
Short-term lease costs		338		989
Total lease costs		595		1,694

	Three Months Ended		Nine Months Ended
	December 31, 2019		December 31, 2019
Operating Leases:
Operating lease costs - fixed	$	179	$	535
Operating lease costs - variable		27		73
Short-term lease costs		164		378
Total lease costs		370		986

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

	Operating Leases
Year ended March 31,
2021	$	216
2022		814
2023		787
2024		733
2025		659
Thereafter		1,597
Total minimum lease payments		4,806
Less: interest		896
Present value of lease liabilities		3,910

Note 16 - Business Segments (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

	Three Months Ended December 31,				Nine Months Ended December 31,
	2020		2019		2020		2019
Revenues:
Grid	$	17,086	$	15,232	$	51,149	$	36,577
Wind		6,546		2,683		14,812		9,120
Total	$	23,632	$	17,915	$	65,961	$	45,697

	Three Months Ended December 31,						Nine Months Ended December 31,
	2020			2019			2020			2019
Operating profit (loss):
Grid	$	(5,826	)	$	(3,732	)	$	(8,388	)	$	(9,723	)
Wind		147			(2,297	)		(1,956	)		(6,015	)
Unallocated corporate expenses		(3,579	)		(590	)		(5,337	)		(1,236	)
Total	$	(9,258	)	$	(6,619	)	$	(15,681	)	$	(16,974	)

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

	December 31, 2020		March 31, 2020
Grid	$	83,623	$	44,044
Wind		6,140		14,250
Corporate assets		85,284		65,815
Total	$	175,047	$	124,109

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) $ / shares in Units, $ in Thousands, € in Millions				1 Months Ended	7 Months Ended	9 Months Ended
	Oct. 26, 2020 USD ($) $ / shares shares	Oct. 01, 2020 USD ($) $ / shares shares	Sep. 02, 2020 EUR (€)	Dec. 31, 2015 USD ($)	Oct. 26, 2019 USD ($)	Dec. 31, 2020 USD ($)	Sep. 11, 2020 EUR (€)	May 29, 2020 EUR (€)	Mar. 31, 2020 USD ($)
Retained Earnings (Accumulated Deficit), Ending Balance						$ (993,697)			$ (978,635)
Cash, Cash Equivalents, and Marketable Securities						78,100
Net Cash Provided by (Used in) Operating Activities, Total					$ (17,779)	(4,871)
Payments to Acquire Businesses, Gross						26,000
Proceeds from Issuance of Common Stock						$ 51,477
Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares	3,670,000
Shares Issued, Price Per Share (in dollars per share) \| $ / shares	$ 15
Proceeds from Issuance of Common Stock	$ 51,500
Additional Shares to be Issued (in shares) \| shares	550,500
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Acquire Businesses, Gross		$ 26,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares		873,657
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares) \| shares		1,000,000
Shares Issued, Price Per Share (in dollars per share) \| $ / shares		$ 14.23
Northeast Power Systems, Inc (NEPSI) [Member] \| Restricted Common Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares		873,657
Inox Wind Limited [Member]
Supply Agreement, Aggregate Value				$ 210,000
Supply Commitment, Extension Period (Year)				3 years
Supply Commitment, Default, Letters of Credit to be Received \| €							€ 4.7	€ 6.0
Supply Commitment, Letters of Credit Received \| €			€ 1.3
Certificates of Deposit [Member] \| Minimum [Member]
Debt Securities, Available-for-sale, Term (Month)						90 days
Certificates of Deposit [Member] \| Maximum [Member]
Debt Securities, Available-for-sale, Term (Month)						270 days

Note 2 - NEPSI Acquisitions (Details Textual) $ / shares in Units, $ in Thousands		3 Months Ended		7 Months Ended	9 Months Ended		12 Months Ended
	Oct. 01, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 26, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)
Payments to Acquire Businesses, Gross					$ 26,000
Business Combination, Contingent Consideration, Liability, Total	$ 4,000	$ 6,700			$ 6,700
Finite-Lived Intangible Asset, Useful Life (Year)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		2,740			$ 2,740
Amortization of Intangible Assets, Total		400	$ 100		$ 600	$ 300
Backlog [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					2 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					7 years
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Acquire Businesses, Gross	$ 26,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares	873,657
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares) \| shares	1,000,000
Business Combination, Consideration Transferred, Total	$ 42,400
Shares Issued, Price Per Share (in dollars per share) \| $ / shares	$ 14.23
Business Combination, Contingent Consideration, Liability, Total	$ 4,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	4,200	1,000			$ 1,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	7,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	1,700
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		2,700			2,700
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		6,600			6,600
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		100			100
Amortization of Intangible Assets, Total		500			500
Northeast Power Systems, Inc (NEPSI) [Member] \| Backlog [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 600
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Northeast Power Systems, Inc (NEPSI) [Member] \| Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 6,100
Northeast Power Systems, Inc (NEPSI) [Member] \| Trademarks and Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 600
Northeast Power Systems, Inc (NEPSI) [Member] \| Trademarks and Trade Names [Member] \| Royalty Rate [Member]
Intangible Assets, Measurement Input	0.08
Northeast Power Systems, Inc (NEPSI) [Member] \| Trademarks and Trade Names [Member] \| Measurement Input, Discount Rate [Member]
Intangible Assets, Measurement Input	0.13
Northeast Power Systems, Inc (NEPSI) [Member] \| Trademarks and Trade Names [Member] \| Measurement Input, Expected Term [Member]
Intangible Assets, Measurement Input	8
Northeast Power Systems, Inc (NEPSI) [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs		$ 300			$ 300
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Suppliers							$ 400

Note 2 - NEPSI Acquisitions - Purchase Price (Details) - USD ($) $ in Thousands		7 Months Ended	9 Months Ended
	Oct. 01, 2020	Oct. 26, 2019	Dec. 31, 2020
Cash payment			$ 26,000
Northeast Power Systems, Inc (NEPSI) [Member]
Cash payment	$ 26,000
Issuance of 873,657 shares of Company’s common stock	12,400
Contingent consideration	4,000
Total consideration	$ 42,400

Note 2 - NEPSI Acquisitions - Purchase Price (Details) (Parentheticals)	Oct. 01, 2020 shares
Northeast Power Systems, Inc (NEPSI) [Member]
Issuance of common stock, shares (in shares)	873,657

Note 2 - NEPSI Acquisitions - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Oct. 01, 2020	Mar. 31, 2020
Goodwill	$ 34,659		$ 1,719
Northeast Power Systems, Inc (NEPSI) [Member]
Net working capital (excluding inventory and deferred revenue)		$ 100
Inventory	$ 1,000	4,200
Property, plant and equipment		2,300
Deferred revenue		(2,700)
Deferred tax liability		1,700
Net tangible assets/(liabilities)		2,200
Net identifiable intangible assets/(liabilities)		7,300
Trade names and trademarks		7,300
Goodwill		32,900
Total purchase consideration		42,400
Northeast Power Systems, Inc (NEPSI) [Member] \| Backlog [Member]
Net identifiable intangible assets/(liabilities)		600
Trade names and trademarks		600
Northeast Power Systems, Inc (NEPSI) [Member] \| Trade Names [Member]
Net identifiable intangible assets/(liabilities)		600
Trade names and trademarks		600
Northeast Power Systems, Inc (NEPSI) [Member] \| Customer Relationships [Member]
Net identifiable intangible assets/(liabilities)		6,100
Trade names and trademarks		$ 6,100

Note 2 - NEPSI Acquisitions - Unaudited Pro Forma Operating Results (Details) - NEPSI [Member] - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 23,632,000	$ 22,412,000	$ 78,298,000	$ 66,135,000
Operating loss	(8,769,000)	(6,988,000)	(15,016,000)	(15,469,000)
Net loss	$ (9,169)	$ (7,117)	$ (15,775)	$ (7,879)
Basic (in dollars per share)	$ (0.36)	$ (0.32)	$ (0.67)	$ (0.36)
Diluted (in dollars per share)	$ (0.36)	$ (0.35)	$ (0.67)	$ (0.57)
Shares - basic (in shares)	25,470	22,059	23,594	21,660
Shares - diluted (in shares)	25,470	22,077	23,594	21,768

Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	78.00%	57.00%	79.00%	69.00%
Minimum [Member]
Warranty Period (Year)	1 year
Contract with Customer, Payment Term (Day)			30 days
Maximum [Member]
Warranty Period (Year)			3 years
Extended Service Warranty, Term (Year)			4 years
Contract with Customer, Payment Term (Day)			60 days
Grant [Member]
Revenues, Total	$ 1.1	$ 3.9	$ 1.8	$ 5.3

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

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

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

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

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Note 3 - Revenue Recognition 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 $ in Millions	Dec. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 51.1
Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	1 year 30 days
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	5 years
Long-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Amount	$ 7.2

Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 23,632	$ 17,915	$ 65,961	$ 45,697
Grid [Member]
Revenues	17,086	15,232	51,149	36,577
Grid [Member] \| Americas [Member]
Revenues	13,394	10,164	39,626	28,663
Grid [Member] \| Asia Pacific [Member]
Revenues	351	330	6,736	2,550
Grid [Member] \| EMEA [Member]
Revenues	3,341	4,738	4,787	5,364
Wind [Member]
Revenues	6,546	2,683	14,812	9,120
Wind [Member] \| Americas [Member]
Revenues	14	2	56	49
Wind [Member] \| Asia Pacific [Member]
Revenues	6,461	2,647	14,463	8,968
Wind [Member] \| EMEA [Member]
Revenues	71	34	293	104
Equipment and Systems [Member] \| Grid [Member]
Revenues	15,930	14,040	47,729	32,438
Equipment and Systems [Member] \| Wind [Member]
Revenues	6,153	2,160	12,828	7,742
Services and Technology Development [Member] \| Grid [Member]
Revenues	1,156	1,192	3,420	4,139
Services and Technology Development [Member] \| Wind [Member]
Revenues	$ 393	$ 523	$ 1,984	$ 1,379

- Definition

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

+ References

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

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

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

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

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

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

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

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

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

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

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

+ Details

Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Unbilled AR, beginning balance	$ 5,711	$ 2,213
Deferred Program Costs, beginning balance	1,631	318
Contract Liabilities, beginning balance	26,142	15,519
Deferred Program Costs, increases for costs incurred to fulfill performance obligations	6,635	3,001
Increase for balances acquired	2,700
Unbilled AR, increase (decrease) due to customer billings	(8,255)	(7,417)
Increase (decrease) due to customer billings	42,785	36,461
Unbilled AR,Decrease due to cost recognition on completed performance obligations
Deferred Program Costs, decrease due to cost recognition on completed performance obligations	(6,969)	(2,221)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	6,644	9,820
Deferred Program Costs, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(48,274)	(28,768)
Unbilled AR, other changes and FX impact		(3)
Deferred Program Costs, other changes and FX impact	33	(1)
Other changes and FX impact	1,025	(69)
Unbilled AR, ending balance	4,201	4,613
Deferred Program Costs, ending balance	1,330	1,097
Contract Liabilities, ending balance	$ 24,378	$ 23,143

Note 3 - Revenue Recognition - Revenues By Major Customers (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Wind [Member] \| Inox Wind Limited [Member]
Concentration risk percentage	24.00%	10.00%	12.00%	11.00%
Grid [Member] \| Department of Homeland Security [Member]
Concentration risk percentage	10.00%	22.00%	10.00%	12.00%
Grid [Member] \| Vestas [Member]
Concentration risk percentage	10.00%	25.00%	10.00%	10.00%
Grid [Member] \| EPC Services Company [Member]
Concentration risk percentage	14.00%	10.00%	17.00%	10.00%

Note 4 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	5,939
Restricted Stock [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	697,167	366,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 5.2
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 328 days
Restricted Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	2 years
Restricted Stock [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		2 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 0.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	146 days
Common Stock [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	27,341	13,174

Note 4 - Stock-based Compensation - Stock-based Compensation Expense By Financial Statement Line Item (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Total stock-based compensation expense	$ 839	$ 590	$ 2,597	$ 1,236
Cost of Sales [Member]
Total stock-based compensation expense	(23)	21	35	45
Research and Development Expense [Member]
Total stock-based compensation expense	179	117	470	219
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	$ 683	$ 452	$ 2,092	$ 971

Note 4 - Stock-based Compensation - Black Scholes Valuation (Details)	9 Months Ended
	Dec. 31, 2019
Expected volatility	66.50%
Risk-free interest rate	1.80%
Expected life (years) (Year)	5 years 332 days

Note 5 - Computation of Net Loss Per Common Share (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		7 Months Ended	9 Months Ended
	Nov. 13, 2019	Dec. 31, 2020	Dec. 31, 2019	Oct. 26, 2019	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		1,100,000			1,100,000
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares)			18,000			108,000
Fair Value Adjustment of Warrants			$ 556	$ (4,648)		$ 4,648
Hudson Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			818,181			818,181	58,823
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 7.81			$ 7.81
Average Common Stock Price (in dollars per share)			$ 8.19			$ 9.29
Stock Issued During Period, Shares, Warrant Exercise (in shares)	786,000
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares)			37,962			130,345
Fair Value Adjustment of Warrants			$ 600			$ 4,600
Shares Tied to Derivative Liability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		1,000,000			1,000,000
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		100,000	100,000		100,000	100,000

Note 5 - Computation of Net Loss Per Common Share - Reconciliation of Numerators and Denominators of EPS Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						7 Months Ended	9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Oct. 26, 2019	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (7,933)	$ (3,712)	$ (3,417)	$ (6,845)	$ (825)	$ (3,539)	$ (11,209)	$ (15,062)	$ (11,209)
Less: decrease in fair value of warrants, net of income tax				(556)			$ 4,648		(4,648)
Plus: change in fair value due to exercise of warrants									83
Net loss - diluted	$ (7,933)			$ (7,401)				$ (15,062)	$ (15,774)
Weighted-average shares of common stock outstanding (in shares)	26,532			22,110				24,143	21,729
Weighted-average shares subject to repurchase (in shares)	(1,062)			(925)				(1,132)	(943)
Shares used in per-share calculation - basic (in shares)	25,470			21,185				23,011	20,786
Common stock warrants (in shares)				18					108
Shares used in per-share calculation - diluted (in shares)	25,470			21,203				23,011	20,894
Net loss per share - basic (in dollars per share)	$ (0.31)			$ (0.32)				$ (0.65)	$ (0.54)
Net loss per share - diluted (in dollars per share)	$ (0.31)			$ (0.35)				$ (0.65)	$ (0.75)

Note 6 - Goodwill and Other Intangibles (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Amortization of Intangible Assets, Total	$ 0.4	$ 0.1	$ 0.6	$ 0.3
Backlog [Member] \| Cost of Sales [Member]
Amortization of Intangible Assets, Total	$ 0.3		$ 0.3

Note 6 - Goodwill and Other Intangibles - Goodwill (Details) $ in Thousands	9 Months Ended
	Dec. 31, 2020 USD ($)
March 31, 2020	$ 1,719
December 31, 2020	34,659
Grid [Member]
March 31, 2020	1,719
NEPSI Acquisition	32,940
Less impairment loss
December 31, 2020	$ 34,659

Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2020	Mar. 31, 2020
Accumulated Amortization	$ (3,306)	$ (2,420)
Net Book Value	$ 9,364
Estimated Useful Life (Year)
Intangible assets, gross amount	$ 13,270	5,970
Intangible assets, net	9,964	3,550
Trade Names [Member]
Trade name	600
Backlog [Member]
Gross Amount	600
Accumulated Amortization	(285)
Net Book Value	$ 315
Estimated Useful Life (Year)	2 years
Customer Relationships [Member]
Gross Amount	$ 6,100
Accumulated Amortization	(239)
Net Book Value	$ 5,861
Estimated Useful Life (Year)	7 years
Core Technology and Know-how [Member]
Gross Amount	$ 5,970	5,970
Accumulated Amortization	(2,782)	(2,420)
Net Book Value	$ 3,188	$ 3,550
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 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) $ in Thousands	Dec. 31, 2020 USD ($)
2021	$ 826
2022	2,115
2023	1,808
2024	1,393
2025	1,077
Thereafter	2,145
Total	$ 9,364

Note 7 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Oct. 01, 2020	Nov. 30, 2014
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Total	$ 0	$ 0	$ (200)	$ 0
Class of Warrant or Right, Outstanding (in shares)	0		0
Hudson Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		818,181		818,181		58,823
Northeast Power Systems, Inc (NEPSI) [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)					1,000,000
Maximum [Member] \| Certificates of Deposit [Member]
Marketable Securities, Realized Gain (Loss), Total			$ 100

Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Oct. 01, 2020	Mar. 31, 2020
Fair value	$ 6,700	$ 4,000
Reported Value Measurement [Member] \| Fair Value, Recurring [Member]
Cash equivalents	56,101		$ 19,394
Marketable securities	10,239		35,195
Fair value	6,730
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	56,101		19,394
Marketable securities	10,239		35,195
Fair value
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents
Marketable securities
Fair value
Reported Value Measurement [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents
Marketable securities
Fair value	$ 6,730

Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair value (Details) - Derivative Financial Instruments, Liabilities [Member] $ in Thousands	9 Months Ended
	Dec. 31, 2020 USD ($)
April 1, 2020
Issuance of contingent consideration	3,990
Mark to market adjustment	2,740
Balance at December 31, 2020	$ 6,730

Note 8 - Accounts Receivable (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Credit Loss Expense (Reversal)		$ 0		$ 0
Maximum [Member]
Accounts Receivable, Credit Loss Expense (Reversal)	$ 100		$ 100

Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Accounts receivable (billed)	$ 7,897	$ 11,276
Accounts receivable (unbilled)	4,201	5,711
Less: Allowance for doubtful accounts	(15)
Accounts receivable, net	$ 12,083	$ 16,987

Note 9 - Inventory (Details Textual) - USD ($) $ in Thousands	3 Months Ended		7 Months Ended	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Oct. 26, 2019	Dec. 31, 2020	Dec. 31, 2019
Inventory Write-down	$ 400	$ 300	$ 491	$ 1,610	$ 500

Note 9 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Raw materials	$ 7,651	$ 10,739
Work-in-process	3,497	1,345
Finished goods	1,698	5,260
Deferred program costs	1,330	1,631
Net inventory	$ 14,176	$ 18,975

Note 10 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Depreciation, Depletion and Amortization, Total	$ 1.2	$ 1.0	$ 2.9	$ 3.1

Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Property, plant and equipment, gross	$ 51,370	$ 48,646
Less accumulated depreciation	(41,823)	(40,081)
Property, plant and equipment, net	9,547	8,565
Construction in Progress [Member]
Property, plant and equipment, gross	111	3,130
Land [Member]
Property, plant and equipment, gross	270
Building [Member]
Property, plant and equipment, gross	1,630
Equipment and Software [Member]
Property, plant and equipment, gross	41,743	41,737
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,310	1,302
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 6,306	$ 2,477

Note 11 - Accounts Payable and Accrued Expenses (Details Textual)	9 Months Ended
	Dec. 31, 2020
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Accounts payable	$ 3,664	$ 10,045
Accrued inventories in-transit	1,131	763
Accrued other miscellaneous expenses	2,397	1,986
Advanced deposits	1,417	666
Accrued compensation	5,751	5,683
Income taxes payable	635	933
Accrued product warranty	2,020	2,015
Total	$ 17,015	$ 22,091

Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Balance at beginning of period	$ 2,109	$ 1,641	$ 2,015	$ 1,545
Acquired warranty obligations	147		147
Change in accruals for warranties during the period	124	93	507	247
Settlements during the period	(360)	(28)	(649)	(86)
Balance at end of period	$ 2,020	$ 1,706	$ 2,020	$ 1,706

Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Total	$ (1,546)	$ 112	$ (1,166)	$ 29
Deferred Tax Liabilities, Acquisition	1,700		1,700
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	1,700		1,700
Liability for Uncertainty in Income Taxes, Current	0		0
Unrecognized Tax Benefits, Ending Balance	$ 0		$ 0
Maximum [Member]
Income Tax Expense (Benefit), Total				$ 100

- Definition

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

+ References + Details

Note 13 - Warrants and Derivative Liabilities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		7 Months Ended	9 Months Ended
	Nov. 13, 2019	Apr. 17, 2019	Dec. 31, 2020	Dec. 31, 2019	Oct. 26, 2019	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Nov. 13, 2014
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			$ 2,740			$ 2,740
Class of Warrant or Right, Outstanding (in shares)			0			0
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants, Net of Tax				556			4,648
Hercules Warrants [Member]
Gain (Loss) on Decrease Fair Value Upon Exercise of Warrant							100
November 2014 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 7.81								$ 7.81
Common Unit, Issued (in shares)									909,090
Common Shares Per Unit (in shares)									1
Class of Warrant or Right, Number of Warrants to Purchase One Share of Stock (in shares)									0.9
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)									818,181
Class of Warrant or Right, Warrants Exercised (in shares)	786,000
Class of Warrant or Right, Warrants Expired (in shares)	32,181
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants, Net of Tax				$ 500			$ 4,600
Hercules Technology Growth Capital [Member]
Stock Issued During Period, Shares, Warrant Exercised (in shares)		22,821
Secured Debt [Member] \| Hercules Technology Growth Capital [Member] \| Hercules Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 7.85			$ 7.85
Derivative, Fair Value, Net, Total								$ 400

Note 13 - Warrants and Derivative Liabilities - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Dec. 31, 2020 USD ($)	Oct. 01, 2020 USD ($)
Fair value	$ 6.7	$ 4.0
Measurement Input, Revenue Risk Premium [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.069	0.071
Measurement Input, Revenue Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.3	0.3
Measurement Input, Share Price [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	23.42	14.23
Measurement Input, Payment Delay [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	80

Note 14 - Leases (Details Textual)	Dec. 31, 2020
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years

Note 14 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Right-of-use assets	$ 3,806	$ 3,359
Lease liability, current portion	581	439
Lease liability, long term portion	3,329	3,000
Total operating lease liabilities	$ 3,910	$ 3,439
Weighted-average remaining lease term (Year)	6 years 14 days	6 years 332 days
Weighted-average discount rate	6.76%	7.08%

Note 14 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Operating lease costs - fixed	$ 226	$ 179	$ 618	$ 535
Operating lease costs - variable	31	27	87	73
Short-term lease costs	338	164	989	378
Total lease costs	$ 595	$ 370	$ 1,694	$ 986

Note 14 - Leases - Minimum Future Lease Obligation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
2021	$ 216
2022	814
2023	787
2024	733
2025	659
Thereafter	1,597
Total minimum lease payments	4,806
Less: interest	896
Total operating lease liabilities	$ 3,910	$ 3,439

Note 15 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Restricted Cash and Cash Equivalents, Noncurrent, Total	$ 5,604	$ 5,657
Preconfirmation, Restricted Cash and Cash Equivalents, Current	600	$ 600
Letter of Credit [Member]
Escrow Deposit	$ 5,000

Note 16 - Business Segments (Details Textual) $ in Thousands	3 Months Ended		7 Months Ended	9 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 26, 2019 USD ($)	Dec. 31, 2020 USD ($) Boe	Dec. 31, 2019 USD ($)
Number of Reportable Segments				2
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 2,740			$ 2,740
Share-based Payment Arrangement, Expense	839	590		2,597	1,236
Corporate, Non-Segment [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2,700			2,700
Share-based Payment Arrangement, Expense	$ 800	$ 600		$ 2,600	$ 1,200
Minimum [Member]
Number of Reportable Segments (Barrel of Oil Equivalent) \| Boe				2

Note 16 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 23,632	$ 17,915	$ 65,961	$ 45,697
Operating profit (loss)	(9,258)	(6,619)	(15,681)	(16,974)
Corporate, Non-Segment [Member]
Operating profit (loss)	(3,579)	(590)	(5,337)	(1,236)
Grid [Member]
Revenues	17,086	15,232	51,149	36,577
Grid [Member] \| Operating Segments [Member]
Operating profit (loss)	(5,826)	(3,732)	(8,388)	(9,723)
Wind [Member]
Revenues	6,546	2,683	14,812	9,120
Wind [Member] \| Operating Segments [Member]
Operating profit (loss)	$ 147	$ (2,297)	$ (1,956)	$ (6,015)

- Definition

+ References

+ Details

Note 16 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Total assets	$ 175,047	$ 124,109
Operating Segments [Member] \| Grid [Member]
Total assets	83,623	44,044
Operating Segments [Member] \| Wind [Member]
Total assets	6,140	14,250
Corporate, Non-Segment [Member]
Total assets	$ 85,284	$ 65,815

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
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-Subparagraph (SX 210.4-08(g)(1)(ii))
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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+ Details