American Superconductor (AMSC) 10-Q 8 Nov 21 2022 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Sep. 30, 2021	Nov. 04, 2021
Document Information [Line Items]
Entity Central Index Key	0000880807
Entity Registrant Name	AMERICAN SUPERCONDUCTOR CORP /DE/
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	0-19672
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-2959321
Entity Address, Address Line One	114 East Main St.
Entity Address, City or Town	Ayer
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01432
City Area Code	978
Local Phone Number	842-3000
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	AMSC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		28,395,386

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Current assets:
Cash and cash equivalents	$ 48,501	$ 67,814
Marketable securities	0	5,140
Accounts receivable, net	25,177	13,267
Inventory, net	21,574	13,306
Prepaid expenses and other current assets	4,924	3,546
Restricted cash	2,323	2,157
Total current assets	102,499	105,230
Property, plant and equipment, net	14,611	8,997
Intangibles, net	12,645	9,153
Right-of-use assets	3,588	3,747
Goodwill	43,471	34,634
Restricted cash	6,165	5,568
Deferred tax assets	1,054	1,223
Other assets	340	314
Total assets	184,373	168,866
Current liabilities:
Accounts payable and accrued expenses	27,891	19,810
Lease liability, current portion	705	612
Debt, current portion	72	0
Contingent consideration	4,720	7,050
Deferred revenue, current portion	23,871	13,266
Total current liabilities	57,259	40,738
Deferred revenue, long-term portion	7,647	7,991
Lease liability, long-term portion	3,012	3,246
Deferred tax liabilities	203	274
Debt, long-term portion	125	0
Other liabilities	23	25
Total liabilities	68,269	52,274
Commitments and Contingencies (Note 16)
Stockholders' equity:
Common stock	288	280
Additional paid-in capital	1,130,921	1,121,495
Treasury stock	(3,639)	(3,593)
Accumulated other comprehensive loss	(316)	(277)
Accumulated deficit	(1,011,150)	(1,001,313)
Total stockholders' equity	116,104	116,592
Total liabilities and stockholders' equity	$ 184,373	$ 168,866

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 27,908	$ 21,117	$ 53,328	$ 42,329
Cost of revenues	24,647	15,596	46,698	31,768
Gross margin	3,261	5,521	6,630	10,561
Operating expenses:
Research and development	2,669	2,719	5,711	5,218
Selling, general and administrative	6,697	5,887	13,838	11,524
Amortization of acquisition-related intangibles	627	121	1,212	242
Change in fair value of contingent consideration	(2,430)	0	(2,330)	0
Total operating expenses	7,563	8,727	18,431	16,984
Operating loss	(4,302)	(3,206)	(11,801)	(6,423)
Interest income, net	25	161	57	320
Other income (expense), net	24	(476)	(40)	(646)
Loss before income tax expense	(4,253)	(3,521)	(11,784)	(6,749)
Income tax expense (benefit)	181	191	(1,947)	380
Net loss	$ (4,434)	$ (3,712)	$ (9,837)	$ (7,129)
Net loss per common share
Basic (in dollars per share)	$ (0.16)	$ (0.17)	$ (0.36)	$ (0.33)
Diluted (in dollars per share)	$ (0.16)	$ (0.17)	$ (0.36)	$ (0.33)
Weighted average number of common shares outstanding
Basic (in shares)	27,252	21,860	27,040	21,775
Diluted (in shares)	27,252	21,860	27,040	21,775

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net loss	$ (4,434)	$ (3,712)	$ (9,837)	$ (7,129)
Other comprehensive (loss) gain, net of tax:
Foreign currency translation (loss) gain	24	(43)	(39)	(46)
Total other comprehensive (loss) gain, net of tax	24	(43)	(39)	(46)
Comprehensive loss	$ (4,410)	$ (3,755)	$ (9,876)	$ (7,175)

Unaudited Consolidated Statemen

Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Restricted Stock Issued in-Lieu of Cash Bonuses [Member]Common Stock [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member]Additional Paid-in Capital [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member]	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, 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 (in shares)				493
Issuance of common stock - restricted shares				$ 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)
Issuance of stock for 401(k) match (in shares)				13
Issuance of stock for 401(k) match					88				88
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
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									(46)
Net loss									(7,129)
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
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 (in shares)				33
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
Issuance of stock for 401(k) match (in shares)				9
Issuance of stock for 401(k) match					101				101
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
Balance (in shares) at Mar. 31, 2021				27,988
Balance at Mar. 31, 2021				$ 280	1,121,495	(3,593)	(277)	(1,001,313)	116,592
Issuance of common stock - bonus payout (in shares)	111
Issuance of common stock - bonus payout	$ 1	$ 1,681	$ 1,682
Issuance of common stock - restricted shares (in shares)				318
Issuance of common stock - restricted shares				$ 3	(3)
Stock-based compensation expense					1,292				1,292
Issuance of stock for 401(k) match (in shares)				7
Issuance of stock for 401(k) match					112				112
Issuance of common stock - Neeltran acquisition (in shares)				302
Issuance of common stock - Neeltran acquisition				$ 3	4,384				4,387
Repurchase of treasury stock						(46)			(46)
Cumulative translation adjustment							(63)		(63)
Net loss								(5,403)	(5,403)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	111
Issuance of common stock - bonus payout	$ 1	$ 1,681	$ 1,682
Issuance of stock for 401(k) match (in shares)				7
Issuance of stock for 401(k) match					112				112
Balance (in shares) at Jun. 30, 2021				28,726
Balance at Jun. 30, 2021				$ 287	1,128,961	(3,639)	(340)	(1,006,716)	118,553
Balance (in shares) at Mar. 31, 2021				27,988
Balance at Mar. 31, 2021				$ 280	1,121,495	(3,593)	(277)	(1,001,313)	116,592
Cumulative translation adjustment									(39)
Net loss									(9,837)
Balance (in shares) at Sep. 30, 2021				28,793
Balance at Sep. 30, 2021				$ 288	1,130,921	(3,639)	(316)	(1,011,150)	116,104
Balance (in shares) at Jun. 30, 2021				28,726
Balance at Jun. 30, 2021				$ 287	1,128,961	(3,639)	(340)	(1,006,716)	118,553
Issuance of common stock - bonus payout (in shares)				47
Issuance of common stock - bonus payout				$ 1	597				598
Stock-based compensation expense					1,101				1,101
Issuance of stock for 401(k) match (in shares)				10
Issuance of stock for 401(k) match					137				137
Cumulative translation adjustment							24		24
Net loss								(4,434)	(4,434)
Issuance of common stock - ESPP (in shares)				10
Issuance of common stock - ESPP					125				125
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)				47
Issuance of common stock - bonus payout				$ 1	597				598
Issuance of stock for 401(k) match (in shares)				10
Issuance of stock for 401(k) match					137				137
Balance (in shares) at Sep. 30, 2021				28,793
Balance at Sep. 30, 2021				$ 288	$ 1,130,921	$ (3,639)	$ (316)	$ (1,011,150)	$ 116,104

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (9,837)	$ (7,129)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	2,631	2,009
Stock-based compensation expense	2,393	1,758
Provision for excess and obsolete inventory	1,203	1,250
Deferred income taxes	(2,137)	0
Change in fair value of contingent consideration	(2,330)	0
Other non-cash items	197	233
Unrealized foreign exchange loss on cash and cash equivalents	1	272
Changes in operating asset and liability accounts:
Accounts receivable	(8,657)	157
Inventory	(475)	3,591
Prepaid expenses and other assets	1,521	(866)
Accounts payable and accrued expenses	3,475	(3,192)
Deferred revenue	281	(4,636)
Net cash used in operating activities	(11,734)	(6,553)
Cash flows from investing activities:
Purchase of property, plant and equipment	(510)	(1,326)
Sale of marketable securities	0	25,006
Cash paid for acquisition, net of cash acquired	(11,479)	0
Proceeds from the maturity of marketable securities	5,189	0
Change in other assets	(30)	63
Net cash (used)/provided by investing activities	(6,830)	23,743
Cash flows from financing activities:
Repurchase of treasury stock	(46)	(670)
Repayment of debt	(18)	0
Proceeds from exercise of employee stock options and ESPP	125	99
Net cash provided/(used) by financing activities	61	(571)
Effect of exchange rate changes on cash	(47)	53
Net increase/(decrease) in cash, cash equivalents and restricted cash	(18,550)	16,672
Cash, cash equivalents and restricted cash at beginning of period	75,539	30,864
Cash, cash equivalents and restricted cash at end of period	56,989	47,536
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	306	275
Non-cash investing and financing activities
Issuance of common stock to settle liabilities	$ 2,529	$ 189

Note 1 - Nature of the Business

Note 1 - Nature of the Business and Operations and Liquidity	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Nature of the Business and Operations American Superconductor Corporation (together with its subsidiaries, “AMSC®” or the “Company”) was founded on April 9, 1987. 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 not September 30, 2021 2020 September 30, 2021; not may March 31, 2021, 10 March 31, 2021 June 2, 2021. Liquidity The Company has historically experienced recurring operating losses and as of September 30, 2021 September 30, 2021 six September 30, 2021 In February 2021, 3 February 2024 ( 3” 3 $250 3 3 On May 6, 2021 ( May 6, 2021, $2.4 $.01 third In March 2020, 19, 19 19 not 19 may While the COVID- 19 19 may 19 may 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 six September 30, 2021 19 may no

Note 2 - Acquisitions

Note 2 - Acquisitions	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	2. 2021 As described in Note 1, Additionally, the Company paid approximately $7.6 million, including $1.9 million of indebtedness secured by the mortgage on the real property as described below, directly to Neeltran lenders at closing to extinguish outstanding Neeltran indebtedness to third Cash payment $ 4.4 Issuance of 301,556 4.4 Debt payment to third party lenders on behalf of sellers 7.6 Total consideration $ 16.4 The Neeltran Acquisition completed by the Company during the six September 30, 2021 805, Business Combinations. 842 842" 15 606, Revenue from Contracts with Customers 606" The following table summarizes the allocation of the purchase price based on the estimated fair value of the assets acquired and liabilities assumed in connection with the Neeltran Acquisition (in millions): Cash and short-term investments $ 0.5 Net working capital (excluding inventory and deferred revenue) (0.9 ) Inventory 9.0 Property, plant and equipment 6.5 Deferred revenue (10.0 ) Deferred tax liability (2.3 ) Net tangible assets/(liabilities) 2.8 Backlog 0.1 Trade names and trademarks 1.2 Customer relationships 3.5 Net identifiable intangible assets/(liabilities) 4.8 Goodwill 8.8 Total purchase consideration $ 16.4 Inventory includes a $0.6 million adjustment to step up the inventory balance to fair value consistent with the purchase price allocation. The fair value was 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 inventory step up adjustment increased cost of revenue $0.6 m six September 30, 2021 not not first Backlog of $0.1 million was evaluated using the multi period excess earnings method under the income approach. The contracts with customers do not two  Customer relationships of $3.5 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 7 years with the expense being allocated to SG&A. Trade names and trademarks of $1.2 million were reviewed using the assumption that the Company would continue to utilize the Neeltran trade name indefinitely. The relief from royalty method was utilized using a 1% royalty rate on revenues with a 24.5% discount rate over 15 years. The goodwill represents the value associated with the acquired workforce and expected synergies related to the business combinations of the two not not may May 6, 2021. no May 6, 2022. $2.3 The results of Neeltran's operations, are included in the Company's consolidated results from the date of the Neeltran Acquisition of May 6, 2021, six September 30, 2021. six September 30, 2021, $0.4 2020 On October 1, 2020 ( 2019 Pursuant to the NEPSI 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 four The NEPSI Acquisition completed by the Company during the fiscal year ended March 31, 2021 805, Business Combinations 606 3 no no 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 12.4 Contingent consideration 4.0 Total consideration $ 42.4 Total consideration consists of (a) cash of $26.0 million, (b) issuance of the Company's common stock, using $14.23 per share, which was the closing price on the day that the Company acquired NEPSI, and (c) $4.0 million of contingent consideration for the earnout liability valued as of the NEPSI Acquisition Date. NEPSI Acquisition costs of $0.3 million were recorded in selling, general and administrative ("SG&A") costs for the fiscal year ended March 31, 2021. 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, 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 NEPSI 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 fiscal year ended March 31, 2021 not not first Backlog of $0.6 million was evaluated using the multi period excess earnings method under the income approach. The contracts with customers do not two 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 7 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 8% royalty rate on revenues with a 13% discount rate over 8 years. Goodwill represents the value associated with the acquired workforce and expected synergies related to the business combination of the two not not may October 1, 2020. Unaudited Pro Forma Operating Results The unaudited pro forma condensed consolidated statement of operations for the three six September 30, 2021 2020 April 1, 2020. Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Revenues $ 27,908 $ 32,233 $ 56,158 $ 64,860 Operating loss (4,346 ) (4,963 ) (11,131 ) (8,591 ) Net loss $ (4,548 ) $ (3,855 ) $ (11,809 ) $ (3,746 ) Net loss per common share Basic $ (0.17 ) $ (0.17 ) $ (0.44 ) $ (0.16 ) Diluted $ (0.17 ) $ (0.17 ) $ (0.44 ) $ (0.16 ) Shares - basic 27,253 23,036 27,101 22,951 Shares - diluted 27,253 23,036 27,101 22,951 The pro forma amounts include the historical operating results of the Company, NEPSI and Neeltran, with appropriate adjustments that give effect to acquisition related costs, income taxes, intangible amortization resulting from the NEPSI Acquisition and Neeltran Acquisition and certain conforming accounting policies of the Company. The pro forma amounts are not not

Note 3 - Revenue Recognition

Note 3 - Revenue Recognition	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	3. The Company’s revenues in its Grid business 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 business 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 606. three six September 30, 2021 three six September 30, 2020, 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 not 606. not 606 three six September 30, 2021 $0.8 three six September 30, 2020, 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 no not not not 606, no 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 The Company provides assurance-type warranties on all product sales for a term of typically one three four The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized. The Company has elected to recognize incremental costs of obtaining a contract as expense when incurred except in contracts where the amortization period would exceed twelve not twelve The Company’s contracts with customers do not may The following tables disaggregate the Company’s revenue by product line and by shipment destination (in thousands): Three Months Ended September 30, 2021 Six Months Ended September 30, 2021 Product Line: Grid Wind Grid Wind Equipment and systems $ 23,031 $ 1,826 $ 44,189 $ 2,860 Services and technology development 1,588 1,463 3,930 2,349 Total $ 24,619 $ 3,289 $ 48,119 $ 5,209 Region: Americas $ 18,115 $ 59 $ 40,760 $ 78 Asia Pacific 3,269 3,220 3,867 5,091 EMEA 3,235 10 3,492 40 Total $ 24,619 $ 3,289 $ 48,119 $ 5,209 Three Months Ended September 30, 2020 Six Months Ended September 30, 2020 Product Line: Grid Wind Grid Wind Equipment and systems $ 15,261 $ 4,059 $ 31,798 $ 6,676 Services and technology development 1,086 711 2,264 1,591 Total $ 16,347 $ 4,770 $ 34,062 $ 8,267 Region: Americas $ 15,677 $ 30 $ 26,231 $ 42 Asia Pacific 370 4,734 6,385 8,002 EMEA 300 6 1,446 223 Total $ 16,347 $ 4,770 $ 34,062 $ 8,267 As of September 30, 2021 2020 8, 9, Unbilled Accounts Receivable Deferred Program Costs Contract Liabilities Beginning balance as of March 31, 2021 $ 5,765 $ 977 $ 21,257 Increases for costs incurred to fulfill performance obligations — 2,277 — Increase for balances acquired — 634 10,048 Increase (decrease) due to customer billings (4,807 ) — 34,344 Decrease due to cost recognition on completed performance obligations — (3,055 ) — Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations 7,838 — (34,169 ) Other changes and FX impact — (3 ) 38 Ending balance as of September 30, 2021 $ 8,796 $ 830 $ 31,518 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 — 3,279 — Increase (decrease) due to customer billings (5,929 ) — 23,931 Decrease due to cost recognition on completed performance obligations — (3,314 ) — Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations 6,186 — (28,678 ) Other changes and FX impact 0 18 561 Ending balance as of September 30, 2020 $ 5,968 $ 1,614 $ 21,956 The Company’s remaining performance obligations represent the unrecognized revenue value of the Company’s contractual commitments. The Company’s performance obligations may September 30, 2021 606 twelve thirteen sixty twelve twelve first three twelve twelve not not The following table sets forth customers who represented 10% three six September 30, 2021 2020 Three Months Ended Six Months Ended Reportable September 30, September 30, Segment 2021 2020 2021 2020 EPC Services Grid <10% 12 % <10% 18 % Inox Wind Limited Wind 10 % <10% <10% <10% Tri-State Generation and Transmission Association, Inc. Grid 12 % — <10% — Micron Technology Grid <10% <10% 10 % <10% Reed & Reed Inc. Grid <10% 25 % <10% 12 % Siemens Gamesa Renewable Energy Pty. Ltd. Grid <10% <10% <10% 13 %

Note 4 - Stock-based Compensati

Note 4 - Stock-based Compensation	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	4. 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 six September 30, 2021 2020 Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 21 $ 30 $ 112 $ 59 Research and development 192 161 439 291 Selling, general and administrative 888 658 1,842 1,408 Total $ 1,101 $ 849 $ 2,393 $ 1,758 The Company issued 47,604 shares of immediately vested common stock, all of which were issued in lieu of cash bonuses, during the three September 30, 2021, six September 30, 2021 three September 30, 2020, six September 30, 2020 The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The Company has no unrecognized compensation co September 30, 2021 September 30, 2021 The Company did not three six September 30, 2021 September 30, 2020.

Note 5 - Computation of Net Los

Note 5 - Computation of Net Loss Per Common Share	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	5. 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 three six September 30, 2021 not not . three six September 30, 2020 not The following table reconciles the numerators and denominators of the earnings per share calculation for the three six September 30, 2021 2020 Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Numerator: Net loss $ (4,434 ) $ (3,712 ) $ (9,837 ) $ (7,129 ) Denominator: Weighted-average shares of common stock outstanding 28,360 23,057 28,141 22,943 Weighted-average shares subject to repurchase (1,108 ) (1,197 ) (1,101 ) (1,168 ) Shares used in per-share calculation ― basic 27,252 21,860 27,040 21,775 Shares used in per-share calculation ― diluted 27,252 21,860 27,040 21,775 Net loss per share ― basic $ (0.16 ) $ (0.17 ) $ (0.36 ) $ (0.33 ) Net loss per share ― diluted $ (0.16 ) $ (0.17 ) $ (0.36 ) $ (0.33 )

Note 6 - Goodwill and Other Int

Note 6 - Goodwill and Other Intangibles	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	6. Goodwill 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. The Company's goodwill balance relates to the Neeltran Acquisition in the current year, the NEPSI Acquisition in fiscal 2020, 2017 not not The following table provides a roll forward of the changes in the Company's Grid business segment goodwill balance: Goodwill March 31, 2021 $ 34,634 Neeltran Acquisition 8,837 Less impairment loss - September 30, 2021 $ 43,471 The Company did not three six September 30, 2021 Other Intangibles Intangible assets at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Gross Amount Accumulated Amortization Net Book Value Gross Amount Accumulated Amortization Net Book Value Estimated Useful Life Backlog $ 681 $ (552 ) $ 129 $ 600 $ (475 ) $ 125 2 Trade name 1,800 — 1,800 600 — 600 Indefinite Customer relationships 9,600 (1,710 ) 7,890 6,100 (739 ) 5,361 7 Core technology and know-how 5,970 (3,144 ) 2,826 5,970 (2,903 ) 3,067 5-10 Intangible assets $ 18,051 $ (5,406 ) $ 12,645 $ 13,270 $ (4,117 ) $ 9,153 The Company recorded intangible amortization expense related to customer relationship and core technology and know-how of $ million and $1.2 million, in the three six September 30, 2021 three six September 30, 2020, Additionally, the Company recorded intangible amortization related to backlog that is reported in cost of revenues of less than $0.1 million and $0.1 million in the three six months ended September 30, 2021 , respectively. Expected future amortization expense related to intangible assets is as follows (in thousands): Years ended March 31, Total 2022 1,358 2023 2,772 2024 2,152 2025 1,648 2026 1,221 Thereafter 1,694 Total $ 10,845 The Company's intangible assets relate entirely to the Grid business segment operations in the United States.

Note 7 - Fair Value Measurement

Note 7 - Fair Value Measurements	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	7. 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 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 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 3 1 2 1 2 3 not 1, 2 3 six September 30, 2021 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 1 Marketable Securities Marketable securities consist of certificates of deposit that are measured using such inputs as quoted prices and are classified within Level 1 September 30, 2021 no change in t three six September 30, 2021 three six September 30, 2020 three six September 30, 2020 one Contingent Consideration Contingent consideration relates to the earnout payment set forth in the NEPSI Stock Purchase Agreement that provides that the selling stockholders may four See Note 13 2, The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of September 30, 2021 March 31, 2021 Total Carrying Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2021: Assets: Cash equivalents $ 20,108 $ 20,108 $ — $ — Marketable securities $ - $ - $ — $ — Derivative liabilities: Contingent consideration $ 4,720 $ — $ — $ 4,720 Total Carrying Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) March 31, 2021: Assets: Cash equivalents $ 54,104 $ 54,104 $ — $ — Marketable securities $ 5,140 $ 5,140 $ — $ — Derivative liabilities: Contingent consideration $ 7,050 $ — $ — $ 7,050 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 Balance at March 31, 2021 $ 7,050 Change in fair value (2,330 ) Balance at September 30, 2021 $ 4,720

Note 8 - Accounts Receivable

Note 8 - Accounts Receivable	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Accounts Receivable [Text Block]	8. Accounts receivable at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Accounts receivable (billed) $ 16,381 $ 7,502 Accounts receivable (unbilled) 8,796 5,765 Accounts receivable, net $ 25,177 $ 13,267

Note 9 - Inventory

Note 9 - Inventory	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	9. Inventory, net of reserves, at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Raw materials $ 11,396 $ 8,255 Work-in-process 7,533 3,297 Finished goods 1,815 777 Deferred program costs 830 977 Net inventory $ 21,574 $ 13,306 The Company recorded inventory write-downs of $0.6 million and $0.5 million for the three September 30, 2021 2020 six September 30, 2021 2020, Deferred program costs as of September 30, 2021 March 31, 2021

Note 10 - Property, Plant and E

Note 10 - Property, Plant and Equipment	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	10. The cost and accumulated depreciation of property, plant and equipment at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Construction in progress - equipment $ 432 $ 220 Land 980 270 Building 5,270 1,630 Equipment and software 43,714 41,652 Finance lease - right of use asset 11 — Furniture and fixtures 1,385 1,333 Leasehold improvements 6,523 6,308 Property, plant and equipment, gross 58,315 51,413 Less accumulated depreciation (43,704 ) (42,416 ) Property, plant and equipment, net $ 14,611 $ 8,997 Depreciation expense was $0.7 million and $0.9 million for the three September 30, 2021 2020 six September 30, 2021 2020, increase in land and building relates to the property added as part of the Neeltran Acquisition.

Note 11 - Accounts Payable and

Note 11 - Accounts Payable and Accrued Expenses	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	11. Accounts payable and accrued expenses at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Accounts payable $ 14,920 $ 5,353 Accrued inventories in-transit 1,772 1,460 Accrued other miscellaneous expenses 2,993 2,369 Advanced deposits 1,479 1,035 Accrued compensation 3,932 7,018 Income taxes payable 640 522 Accrued product warranty 2,155 2,053 Total $ 27,891 $ 19,810 The Company generally provides a one three Product warranty activity was as follows (in thousands): Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Balance at beginning of period $ 2,187 $ 2,168 $ 2,053 $ 2,015 Acquired warranty obligations - — 248 — Change in accruals for warranties during the period 206 148 314 384 Settlements during the period (238 ) (207 ) (460 ) (290 ) Balance at end of period $ 2,155 $ 2,109 $ 2,155 $ 2,109

Note 12 - Income Taxes

Note 12 - Income Taxes	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	12. The Company recorded an income tax expense of $ million and income tax benefit of $1.9 million in the three six September 30, 2021 , respectively. three six September 30, 2020, As a result of a difference in book and tax basis related to the intangible assets acquired in the Neeltran Acquisition (see Note 2, during the six months ended September 30, 2021 not may May 6, 2021. 2, no May 6, 2022. not Accounting for income taxes requires a two first not second 50% not not six September 30, 2021 not September 30, 2021

Note 13 - Contingent Considerat

Note 13 - Contingent Consideration	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Business Combination, Contingent Consideration [Text Block]	13. Contingent Consideration The Company evaluated the NEPSI Acquisition earnout payment set forth in the NEPSI Stock Purchase Agreement (see Note 2, may 815, Derivatives and Hedging 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 NEPSI Acquisition: September 30, June 30, Fiscal Year 2021 2021 2021 Revenue risk premium 6.60 % 6.60 % Revenue volatility 30 % 30 % Stock Price $ 14.58 $ 17.39 Payment delay (days) 80 80 Fair value 4.7 7.2 March 31, December 31, October 1, Fiscal Year 2020 2021 2020 2020 Revenue risk premium 6.70 % 6.90 % 7.10 % Revenue volatility 30 % 30 % 30 % Stock Price $ 18.96 $ 23.42 $ 14.23 Payment delay (days) 80 80 — Fair value 7.1 6.7 4.0 The Company recorded a net gain of $2.4 million and $2.3 million resulting from the decrease in the fair value of the contingent consideration in the three six September 30, 2021

Note 14 - Debt

Note 14 - Debt	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Debt Disclosure [Text Block]	14. As part of the Neeltran Acquisition, the Company identified four equipment financing agreements that Neeltran had entered into prior to the acquisition on May 6, 2021. 0.1 six September 30, 2021

Note 15 - Leases

Note 15 - Leases	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	15. The Company determines whether a contract is or contains a lease at inception of a contract. The Company defines a lease as a contract, or part of a contract, that conveys the right to control the use of identified property or equipment (an identified asset) for a period of time in exchange for consideration. Control over the use of the identified asset means that the Company have both the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset. 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 Following the Neeltran Acquisition, the Company evaluated all open Neeltran contracts at the date of the acquisition to determine if any applied under ASC 842 842 nine twelve 842 one not 842 Operating 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 five 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 Finance Leases As part of the adoption of ASC 842 one February 2020, May 2023. May 6, 2021, $13.2 September 30, 2021, Finance lease right-of-use assets and lease liabilities are recognized similar to an operating lease, at the lease commencement date or the date the lessor makes the leased asset available for use. Finance lease right-of-use assets are generally amortized on a straight-line basis over the lease term, and the carrying amount of the finance lease liabilities are ( 1 not 2 Supplemental balance sheet information related to leases at September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Leases: Right-of-use assets - Financing $ 11 — Right-of-use assets - Operating 3,588 3,747 Total right-of-use assets 3,599 3,747 Lease liabilities - ST Financing $ 5 — Lease liabilities - ST Operating 700 612 Lease liabilities - LT Financing 5 — Lease liabilities - LT Operating 3,007 3,246 Total lease liabilities 3,717 3,858 Weighted-average remaining lease term 5.29 5.82 Weighted-average discount rate 6.58 % 6.72 % The costs related to the Company's finance lease are not three six September 30, 2021 2020 Three Months Ended Six Months Ended September 30, 2021 September 30, 2021 Operating Leases: Operating lease costs - fixed $ 238 $ 469 Operating lease costs - variable 32 63 Short-term lease costs 65 131 Total lease costs 335 663 Three Months Ended Six Months Ended September 30, 2020 September 30, 2020 Operating Leases: Operating lease costs - fixed $ 214 $ 392 Operating lease costs - variable 28 55 Short-term lease costs 510 678 Total lease costs 752 1,125 The Company’s estimated minimum future lease obligations under the Company's leases are as follows (in thousands): Leases Year ended March 31, 2022 $ 460 2023 886 2024 798 2025 674 2026 672 Thereafter 934 Total minimum lease payments 4,424 Less: interest 707 Present value of lease liabilities 3,717

Note 16 - Commitments and Conti

Note 16 - Commitments and Contingencies	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	16. 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 not not 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 September 30, 2021 March 31, 2021

Note 17 - Business Segments

Note 17 - Business Segments	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	17. 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 2 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 Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Revenues: Grid $ 24,619 $ 16,347 $ 48,119 $ 34,062 Wind 3,289 4,770 5,209 8,267 Total $ 27,908 $ 21,117 $ 53,328 $ 42,329 Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Operating Income (loss): Grid $ (5,836 ) $ (1,374 ) $ (11,180 ) $ (2,562 ) Wind 205 (983 ) (558 ) (2,103 ) Unallocated corporate gain (expenses) 1,329 (849 ) (63 ) (1,758 ) Total $ (4,302 ) $ (3,206 ) $ (11,801 ) $ (6,423 ) 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 two Unallocated corporate expenses consist of a gain on contingent consideration of $2.4 million and $2.3 million in the three six September 30, 2021, million and $0.8 million in the three months ended September 30, 2021 , and 2020 , respectively and $2.4 million and $1.8 million in the six September 30, 2021 2020, Total assets for the two September 30, 2021 March 31, 2021 September 30, 2021 March 31, 2021 Grid $ 118,503 $ 81,253 Wind 8,221 6,098 Corporate assets 57,649 81,515 Total $ 184,373 $ 168,866

Note 18 - Recent Accounting Pro

Note 18 - Recent Accounting Pronouncements	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	18. In June 2016, 2016 13, Financial Instruments-Credit Losses (Topic 326 2016 13 2019 10 November 2019, December 15, 2022. 2016 13 may In December 2019, 2019 12, Income Taxes (Topic 740 2019 12 April 1, 2021, 2019 12 no

Note 19 - Subsequent Events

Note 19 - Subsequent Events	6 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	19. The Company has performed an evaluation of subsequent events through the time of filing this Quarterly Report on Form 10 no

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Cash payment $ 4.4 Issuance of 301,556 4.4 Debt payment to third party lenders on behalf of sellers 7.6 Total consideration $ 16.4 Cash payment $ 26.0 Issuance of 873,657 12.4 Contingent consideration 4.0 Total consideration $ 42.4
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Cash and short-term investments $ 0.5 Net working capital (excluding inventory and deferred revenue) (0.9 ) Inventory 9.0 Property, plant and equipment 6.5 Deferred revenue (10.0 ) Deferred tax liability (2.3 ) Net tangible assets/(liabilities) 2.8 Backlog 0.1 Trade names and trademarks 1.2 Customer relationships 3.5 Net identifiable intangible assets/(liabilities) 4.8 Goodwill 8.8 Total purchase consideration $ 16.4 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 September 30, Six Months Ended September 30, 2021 2020 2021 2020 Revenues $ 27,908 $ 32,233 $ 56,158 $ 64,860 Operating loss (4,346 ) (4,963 ) (11,131 ) (8,591 ) Net loss $ (4,548 ) $ (3,855 ) $ (11,809 ) $ (3,746 ) Net loss per common share Basic $ (0.17 ) $ (0.17 ) $ (0.44 ) $ (0.16 ) Diluted $ (0.17 ) $ (0.17 ) $ (0.44 ) $ (0.16 ) Shares - basic 27,253 23,036 27,101 22,951 Shares - diluted 27,253 23,036 27,101 22,951

Note 3 - Revenue Recognition (T

Note 3 - Revenue Recognition (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three Months Ended September 30, 2021 Six Months Ended September 30, 2021 Product Line: Grid Wind Grid Wind Equipment and systems $ 23,031 $ 1,826 $ 44,189 $ 2,860 Services and technology development 1,588 1,463 3,930 2,349 Total $ 24,619 $ 3,289 $ 48,119 $ 5,209 Region: Americas $ 18,115 $ 59 $ 40,760 $ 78 Asia Pacific 3,269 3,220 3,867 5,091 EMEA 3,235 10 3,492 40 Total $ 24,619 $ 3,289 $ 48,119 $ 5,209 Three Months Ended September 30, 2020 Six Months Ended September 30, 2020 Product Line: Grid Wind Grid Wind Equipment and systems $ 15,261 $ 4,059 $ 31,798 $ 6,676 Services and technology development 1,086 711 2,264 1,591 Total $ 16,347 $ 4,770 $ 34,062 $ 8,267 Region: Americas $ 15,677 $ 30 $ 26,231 $ 42 Asia Pacific 370 4,734 6,385 8,002 EMEA 300 6 1,446 223 Total $ 16,347 $ 4,770 $ 34,062 $ 8,267
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, 2021 $ 5,765 $ 977 $ 21,257 Increases for costs incurred to fulfill performance obligations — 2,277 — Increase for balances acquired — 634 10,048 Increase (decrease) due to customer billings (4,807 ) — 34,344 Decrease due to cost recognition on completed performance obligations — (3,055 ) — Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations 7,838 — (34,169 ) Other changes and FX impact — (3 ) 38 Ending balance as of September 30, 2021 $ 8,796 $ 830 $ 31,518 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 — 3,279 — Increase (decrease) due to customer billings (5,929 ) — 23,931 Decrease due to cost recognition on completed performance obligations — (3,314 ) — Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations 6,186 — (28,678 ) Other changes and FX impact 0 18 561 Ending balance as of September 30, 2020 $ 5,968 $ 1,614 $ 21,956
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	Three Months Ended Six Months Ended Reportable September 30, September 30, Segment 2021 2020 2021 2020 EPC Services Grid <10% 12 % <10% 18 % Inox Wind Limited Wind 10 % <10% <10% <10% Tri-State Generation and Transmission Association, Inc. Grid 12 % — <10% — Micron Technology Grid <10% <10% 10 % <10% Reed & Reed Inc. Grid <10% 25 % <10% 12 % Siemens Gamesa Renewable Energy Pty. Ltd. Grid <10% <10% <10% 13 %

Note 4 - Stock-based Compensa_2

Note 4 - Stock-based Compensation (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 21 $ 30 $ 112 $ 59 Research and development 192 161 439 291 Selling, general and administrative 888 658 1,842 1,408 Total $ 1,101 $ 849 $ 2,393 $ 1,758

Note 5 - Computation of Net L_2

Note 5 - Computation of Net Loss Per Common Share (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Numerator: Net loss $ (4,434 ) $ (3,712 ) $ (9,837 ) $ (7,129 ) Denominator: Weighted-average shares of common stock outstanding 28,360 23,057 28,141 22,943 Weighted-average shares subject to repurchase (1,108 ) (1,197 ) (1,101 ) (1,168 ) Shares used in per-share calculation ― basic 27,252 21,860 27,040 21,775 Shares used in per-share calculation ― diluted 27,252 21,860 27,040 21,775 Net loss per share ― basic $ (0.16 ) $ (0.17 ) $ (0.36 ) $ (0.33 ) Net loss per share ― diluted $ (0.16 ) $ (0.17 ) $ (0.36 ) $ (0.33 )

Note 6 - Goodwill and Other I_2

Note 6 - Goodwill and Other Intangibles (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Goodwill [Table Text Block]	Goodwill March 31, 2021 $ 34,634 Neeltran Acquisition 8,837 Less impairment loss - September 30, 2021 $ 43,471
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2021 March 31, 2021 Gross Amount Accumulated Amortization Net Book Value Gross Amount Accumulated Amortization Net Book Value Estimated Useful Life Backlog $ 681 $ (552 ) $ 129 $ 600 $ (475 ) $ 125 2 Trade name 1,800 — 1,800 600 — 600 Indefinite Customer relationships 9,600 (1,710 ) 7,890 6,100 (739 ) 5,361 7 Core technology and know-how 5,970 (3,144 ) 2,826 5,970 (2,903 ) 3,067 5-10 Intangible assets $ 18,051 $ (5,406 ) $ 12,645 $ 13,270 $ (4,117 ) $ 9,153
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Years ended March 31, Total 2022 1,358 2023 2,772 2024 2,152 2025 1,648 2026 1,221 Thereafter 1,694 Total $ 10,845

Note 7 - Fair Value Measureme_2

Note 7 - Fair Value Measurements (Tables)	6 Months Ended
	Sep. 30, 2021
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) September 30, 2021: Assets: Cash equivalents $ 20,108 $ 20,108 $ — $ — Marketable securities $ - $ - $ — $ — Derivative liabilities: Contingent consideration $ 4,720 $ — $ — $ 4,720 Total Carrying Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) March 31, 2021: Assets: Cash equivalents $ 54,104 $ 54,104 $ — $ — Marketable securities $ 5,140 $ 5,140 $ — $ — Derivative liabilities: Contingent consideration $ 7,050 $ — $ — $ 7,050
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Acquisition Contingent Consideration Balance at March 31, 2021 $ 7,050 Change in fair value (2,330 ) Balance at September 30, 2021 $ 4,720

Note 8 - Accounts Receivable (T

Note 8 - Accounts Receivable (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Accounts Receivable [Table Text Block]	September 30, 2021 March 31, 2021 Accounts receivable (billed) $ 16,381 $ 7,502 Accounts receivable (unbilled) 8,796 5,765 Accounts receivable, net $ 25,177 $ 13,267

Note 9 - Inventory (Tables)

Note 9 - Inventory (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, 2021 March 31, 2021 Raw materials $ 11,396 $ 8,255 Work-in-process 7,533 3,297 Finished goods 1,815 777 Deferred program costs 830 977 Net inventory $ 21,574 $ 13,306

Note 10 - Property, Plant and_2

Note 10 - Property, Plant and Equipment (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	September 30, 2021 March 31, 2021 Construction in progress - equipment $ 432 $ 220 Land 980 270 Building 5,270 1,630 Equipment and software 43,714 41,652 Finance lease - right of use asset 11 — Furniture and fixtures 1,385 1,333 Leasehold improvements 6,523 6,308 Property, plant and equipment, gross 58,315 51,413 Less accumulated depreciation (43,704 ) (42,416 ) Property, plant and equipment, net $ 14,611 $ 8,997

Note 11 - Accounts Payable an_2

Note 11 - Accounts Payable and Accrued Expenses (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	September 30, 2021 March 31, 2021 Accounts payable $ 14,920 $ 5,353 Accrued inventories in-transit 1,772 1,460 Accrued other miscellaneous expenses 2,993 2,369 Advanced deposits 1,479 1,035 Accrued compensation 3,932 7,018 Income taxes payable 640 522 Accrued product warranty 2,155 2,053 Total $ 27,891 $ 19,810
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Balance at beginning of period $ 2,187 $ 2,168 $ 2,053 $ 2,015 Acquired warranty obligations - — 248 — Change in accruals for warranties during the period 206 148 314 384 Settlements during the period (238 ) (207 ) (460 ) (290 ) Balance at end of period $ 2,155 $ 2,109 $ 2,155 $ 2,109

Note 13 - Contingent Consider_2

Note 13 - Contingent Consideration (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	September 30, June 30, Fiscal Year 2021 2021 2021 Revenue risk premium 6.60 % 6.60 % Revenue volatility 30 % 30 % Stock Price $ 14.58 $ 17.39 Payment delay (days) 80 80 Fair value 4.7 7.2 March 31, December 31, October 1, Fiscal Year 2020 2021 2020 2020 Revenue risk premium 6.70 % 6.90 % 7.10 % Revenue volatility 30 % 30 % 30 % Stock Price $ 18.96 $ 23.42 $ 14.23 Payment delay (days) 80 80 — Fair value 7.1 6.7 4.0

Note 15 - Leases (Tables)

Note 15 - Leases (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Assets And Liabilities Lessee [Table Text Block]	September 30, 2021 March 31, 2021 Leases: Right-of-use assets - Financing $ 11 — Right-of-use assets - Operating 3,588 3,747 Total right-of-use assets 3,599 3,747 Lease liabilities - ST Financing $ 5 — Lease liabilities - ST Operating 700 612 Lease liabilities - LT Financing 5 — Lease liabilities - LT Operating 3,007 3,246 Total lease liabilities 3,717 3,858 Weighted-average remaining lease term 5.29 5.82 Weighted-average discount rate 6.58 % 6.72 %
Lease, Cost [Table Text Block]	Three Months Ended Six Months Ended September 30, 2021 September 30, 2021 Operating Leases: Operating lease costs - fixed $ 238 $ 469 Operating lease costs - variable 32 63 Short-term lease costs 65 131 Total lease costs 335 663 Three Months Ended Six Months Ended September 30, 2020 September 30, 2020 Operating Leases: Operating lease costs - fixed $ 214 $ 392 Operating lease costs - variable 28 55 Short-term lease costs 510 678 Total lease costs 752 1,125
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Leases Year ended March 31, 2022 $ 460 2023 886 2024 798 2025 674 2026 672 Thereafter 934 Total minimum lease payments 4,424 Less: interest 707 Present value of lease liabilities 3,717

Note 17 - Business Segments (Ta

Note 17 - Business Segments (Tables)	6 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Revenues: Grid $ 24,619 $ 16,347 $ 48,119 $ 34,062 Wind 3,289 4,770 5,209 8,267 Total $ 27,908 $ 21,117 $ 53,328 $ 42,329 Three Months Ended September 30, Six Months Ended September 30, 2021 2020 2021 2020 Operating Income (loss): Grid $ (5,836 ) $ (1,374 ) $ (11,180 ) $ (2,562 ) Wind 205 (983 ) (558 ) (2,103 ) Unallocated corporate gain (expenses) 1,329 (849 ) (63 ) (1,758 ) Total $ (4,302 ) $ (3,206 ) $ (11,801 ) $ (6,423 )
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	September 30, 2021 March 31, 2021 Grid $ 118,503 $ 81,253 Wind 8,221 6,098 Corporate assets 57,649 81,515 Total $ 184,373 $ 168,866

Note 1 - Nature of the Busine_2

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	May 06, 2021	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021	May 29, 2020
Retained Earnings (Accumulated Deficit), Ending Balance		$ (1,011,150)		$ (1,001,313)
Cash, Cash Equivalents, and Marketable Securities		48,500
Net Cash Provided by (Used in) Operating Activities, Total		(11,734)	$ (6,553)
Payments to Acquire Businesses, Gross		$ 11,479	$ 0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 4,400
AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	4,300
Inox Wind Limited [Member]
Supply Commitment, Default, Letters of Credit to be Received					$ 250,000
TD Bank [Member] | AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	1,900
Neeltran Inc. Sellling Stockholders [Member] | Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 1,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	301,556
Capanna, Sr. and Capanna, Jr. [Member] | Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 1,100
Neeltran Third Party Lenders [Member] | Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	7,600
Neeltran Third Party Lenders [Member] | Neeltran Inc. [Member] | Indebtedness Secured by Mortgage on Real Property [Member]
Payments to Acquire Businesses, Gross	1,900
Owners of Neeltran Headquarters [Member] | AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	$ 2,400

Note 2 - Acquisitions (Details

Note 2 - Acquisitions (Details Textual) $ / shares in Units, $ in Thousands	May 06, 2021USD ($)shares	Oct. 01, 2020USD ($)$ / sharesshares	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Payments to Acquire Businesses, Gross					$ 11,479	$ 0
Cost of Revenue, Total			$ 24,647	$ 15,596	46,698	$ 31,768
Business Combination, Contingent Consideration, Liability, Total		$ 4,000	$ 4,700		$ 4,700		$ 7,100		$ 7,200	$ 6,700
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Suppliers								$ 400
Backlog [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					2 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					7 years
AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	$ 4,300
Owners of Neeltran Headquarters [Member] | AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	2,400
TD Bank [Member] | AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	1,900
Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	4,400
Business Combination, Consideration Transferred, Total	16,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory					$ 600
Cost of Revenue, Total					600
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual					12,500
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual					$ (400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	2,300
Neeltran Inc. [Member] | Trademarks and Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 1,200
Neeltran Inc. [Member] | Trademarks and Trade Names [Member] | Royalty Rate [Member]
Intangible Assets, Measurement Input	1
Neeltran Inc. [Member] | Trademarks and Trade Names [Member] | Measurement Input, Discount Rate [Member]
Intangible Assets, Measurement Input	24.5
Neeltran Inc. [Member] | Trademarks and Trade Names [Member] | Measurement Input, Expected Term [Member]
Intangible Assets, Measurement Input	15
Neeltran Inc. [Member] | Backlog [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 100
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Neeltran Inc. [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 3,500
Finite-Lived Intangible Asset, Useful Life (Year)	7 years
Neeltran Inc. [Member] | Neeltran Inc. Sellling Stockholders [Member]
Payments to Acquire Businesses, Gross	$ 1,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares	301,556
Neeltran Inc. [Member] | Capanna, Sr. and Capanna, Jr. [Member]
Payments to Acquire Businesses, Gross	$ 1,100
Neeltran Inc. [Member] | Neeltran Third Party Lenders [Member]
Payments to Acquire Businesses, Gross	7,600
Neeltran Inc. [Member] | Neeltran Third Party Lenders [Member] | Indebtedness Secured by Mortgage on Real Property [Member]
Payments to Acquire Businesses, Gross	$ 1,900
Northeast Power Systems, Inc (NEPSI) [Member]
Payments to Acquire Businesses, Gross		26,000
Business Combination, Consideration Transferred, Total		$ 42,400
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	1,000,000		1,000,000
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, Deferred Tax Liabilities		1,700
Northeast Power Systems, Inc (NEPSI) [Member] | Fair Value Adjustment to Inventory [Member]
Cost of Revenue, Total							1,000
Northeast Power Systems, Inc (NEPSI) [Member] | Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs							$ 300
Northeast Power Systems, Inc (NEPSI) [Member] | Trademarks and Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		$ 600
Northeast Power Systems, Inc (NEPSI) [Member] | Trademarks and Trade Names [Member] | Royalty Rate [Member]
Intangible Assets, Measurement Input		8
Northeast Power Systems, Inc (NEPSI) [Member] | Trademarks and Trade Names [Member] | Measurement Input, Discount Rate [Member]
Intangible Assets, Measurement Input		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] | 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

Note 2 - Acquisitions - Purchas

Note 2 - Acquisitions - Purchase Price (Details) - USD ($) $ in Thousands	May 06, 2021	Oct. 01, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash or Debt payment			$ 11,479	$ 0
Neeltran Inc. [Member]
Cash or Debt payment	$ 4,400
Total consideration	16,400
Neeltran Inc. [Member] | Neeltran Inc. Sellling Stockholders [Member]
Cash or Debt payment	1,000
Issuance of 301,556 shares of Company's common stock	4,400
Neeltran Inc. [Member] | Neeltran Third Party Lenders [Member]
Cash or Debt payment	$ 7,600
Northeast Power Systems, Inc (NEPSI) [Member]
Cash or Debt payment		$ 26,000
Issuance of 301,556 shares of Company's common stock		12,400
Total consideration		42,400
Contingent consideration		$ 4,000

Note 2 - Acquisitions - Purch_2

Note 2 - Acquisitions - Purchase Price (Details) (Parentheticals) - shares	May 06, 2021	Oct. 01, 2020
Neeltran Inc. [Member] | Neeltran Inc. Sellling Stockholders [Member]
Issuance of common stock, shares (in shares)	301,556
Northeast Power Systems, Inc (NEPSI) [Member]
Issuance of common stock, shares (in shares)		873,657

Note 2 - Acquisitions - Estimat

Note 2 - Acquisitions - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2021	May 06, 2021	Mar. 31, 2021	Oct. 01, 2020
Goodwill	$ 43,471		$ 34,634
Neeltran Inc. [Member]
Cash and short-term investments		$ 500
Net working capital (excluding inventory and deferred revenue)		(900)
Inventory		9,000
Property, plant and equipment		6,500
Deferred revenue		(10,000)
Deferred tax liability		2,300
Net tangible assets/(liabilities)		2,800
Net identifiable intangible assets/(liabilities)		4,800
Goodwill		8,800
Total purchase consideration		16,400
Net working capital (excluding inventory and deferred revenue)		(900)
Neeltran Inc. [Member] | Trademarks and Trade Names [Member]
Trade names and trademarks		1,200
Neeltran Inc. [Member] | Backlog [Member]
Finite-lived Intangibles Assets		100
Neeltran Inc. [Member] | Customer Relationships [Member]
Finite-lived Intangibles Assets		$ 3,500
Northeast Power Systems, Inc (NEPSI) [Member]
Net working capital (excluding inventory and deferred revenue)				$ 100
Inventory				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
Goodwill				32,900
Total purchase consideration				42,400
Net working capital (excluding inventory and deferred revenue)				100
Northeast Power Systems, Inc (NEPSI) [Member] | Trademarks and Trade Names [Member]
Trade names and trademarks				600
Northeast Power Systems, Inc (NEPSI) [Member] | Backlog [Member]
Finite-lived Intangibles Assets				600
Northeast Power Systems, Inc (NEPSI) [Member] | Trade Names [Member]
Trade names and trademarks				600
Northeast Power Systems, Inc (NEPSI) [Member] | Customer Relationships [Member]
Finite-lived Intangibles Assets				$ 6,100

Note 2 - Acquisitions - Unaudit

Note 2 - Acquisitions - Unaudited Pro Forma Operating Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 27,908	$ 32,233	$ 56,158	$ 64,860
Operating loss	(4,346)	(4,963)	(11,131)	(8,591)
Net loss	$ (4,548)	$ (3,855)	$ (11,809)	$ (3,746)
Basic (in dollars per share)	$ (0.17)	$ (0.17)	$ (0.44)	$ (0.16)
Diluted (in dollars per share)	$ (0.17)	$ (0.17)	$ (0.44)	$ (0.16)
Shares - basic (in shares)	27,253	23,036	27,101	22,951
Shares - diluted (in shares)	27,253	23,036	27,101	22,951

Note 3 - Revenue Recognition 1

Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	86.00%	78.00%	82.00%	79.00%
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	$ 0.3	$ 0.4	$ 0.8	$ 0.8

Note 3 - Revenue Recognition 2

Note 3 - Revenue Recognition 2 (Details Textual) $ in Millions	Sep. 30, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	12 months
Revenue, Remaining Performance Obligation, Amount	$ 89.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Revenue, Remaining Performance Obligation, Amount	$ 10.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	13 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	60 months

Note 3 - Revenue Recognition -

Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 27,908	$ 21,117	$ 53,328	$ 42,329
Grid [Member]
Revenues	24,619	16,347	48,119	34,062
Grid [Member] | Americas [Member]
Revenues	18,115	15,677	40,760	26,231
Grid [Member] | Asia Pacific [Member]
Revenues	3,269	370	3,867	6,385
Grid [Member] | EMEA [Member]
Revenues	3,235	300	3,492	1,446
Wind [Member]
Revenues	3,289	4,770	5,209	8,267
Wind [Member] | Americas [Member]
Revenues	59	30	78	42
Wind [Member] | Asia Pacific [Member]
Revenues	3,220	4,734	5,091	8,002
Wind [Member] | EMEA [Member]
Revenues	10	6	40	223
Equipment and Systems [Member] | Grid [Member]
Revenues	23,031	15,261	44,189	31,798
Equipment and Systems [Member] | Wind [Member]
Revenues	1,826	4,059	2,860	6,676
Services and Technology Development [Member] | Grid [Member]
Revenues	1,588	1,086	3,930	2,264
Services and Technology Development [Member] | Wind [Member]
Revenues	$ 1,463	$ 711	$ 2,349	$ 1,591

Note 3 - Revenue Recognition _2

Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Unbilled AR, beginning balance	$ 5,765	$ 5,711
Deferred Program Costs, beginning balance	977	1,631
Contract Liabilities, beginning balance	21,257	26,142
Deferred Program Costs, increases for costs incurred to fulfill performance obligations	2,277	3,279
Deferred Program Costs, beginning balance increase for balances acquired	634
Increase for balances acquired	10,048
Unbilled AR, increase (decrease) due to customer billings	(4,807)	(5,929)
Increase (decrease) due to customer billings	34,344	23,931
Deferred Program Costs, decrease due to cost recognition on completed performance obligations	(3,055)	(3,314)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	7,838	6,186
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(34,169)	(28,678)
Deferred Program Costs, other changes and FX impact	(3)	18
Other changes and FX impact	38	561
Unbilled AR, other changes and FX impact		0
Unbilled AR, ending balance	8,796	5,968
Deferred Program Costs, ending balance	830	1,614
Contract Liabilities, ending balance	$ 31,518	$ 21,956

Note 3 - Revenue Recognition _3

Note 3 - Revenue Recognition - Revenues By Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member] - Grid [Member]	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
EPC Services Company [Member]
Concentration risk percentage		12.00%	10.00%	18.00%
Inox Wind Limited [Member]
Concentration risk percentage	10.00%	10.00%	10.00%	10.00%
Tri-state Generation and Transmission Association Inc [Member]
Concentration risk percentage	12.00%	0.00%	10.00%	0.00%
Micron Technology [Member]
Concentration risk percentage	10.00%		10.00%	10.00%
Reed & Reed Inc. [Member]
Concentration risk percentage	10.00%	25.00%	10.00%	12.00%
Siemens Gamesa Renewable Energy [Member]
Concentration risk percentage		10.00%	10.00%	13.00%

Note 4 - Stock-based Compensa_3

Note 4 - Stock-based Compensation (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	0		0	0
Immediately Vested Common Stock Issued in Lieu of Cash Bonuses [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	47,604			158,356
Immediately Vested Common Stock [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)				166,648	27,341
Restricted Stock [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)		32,500		309,700	688,167
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 6,800			$ 6,800
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						1 year 8 months 12 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 Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 0			$ 0

Note 4 - Stock-based Compensa_4

Note 4 - Stock-based Compensation - Stock-based Compensation Expense By Financial Statement Line Item (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total stock-based compensation expense	$ 1,101	$ 849	$ 2,393	$ 1,758
Cost of Sales [Member]
Total stock-based compensation expense	21	30	112	59
Research and Development Expense [Member]
Total stock-based compensation expense	192	161	439	291
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	$ 888	$ 658	$ 1,842	$ 1,408

Note 5 - Computation of Net L_3

Note 5 - Computation of Net Loss Per Common Share (Details Textual) - shares shares in Millions	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1.1
Shares Tied to Derivative Liability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		1
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		0.1	0.1

Note 5 - Computation of Net L_4

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				6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net loss	$ (4,434)	$ (5,403)	$ (3,712)	$ (3,417)	$ (9,837)	$ (7,129)
Weighted-average shares of common stock outstanding (in shares)	28,360		23,057		28,141	22,943
Weighted-average shares subject to repurchase (in shares)	(1,108)		(1,197)		(1,101)	(1,168)
Shares used in per-share calculation - basic (in shares)	27,252		21,860		27,040	21,775
Shares used in per-share calculation - diluted (in shares)	27,252		21,860		27,040	21,775
Net loss per share - basic (in dollars per share)	$ (0.16)		$ (0.17)		$ (0.36)	$ (0.33)
Net loss per share - diluted (in dollars per share)	$ (0.16)		$ (0.17)		$ (0.36)	$ (0.33)

Note 6 - Goodwill and Other I_3

Note 6 - Goodwill and Other Intangibles (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Amortization of Intangible Assets, Total	$ 0.6	$ 0.1	$ 1.2	$ 0.2
Backlog [Member] | Maximum [Member]
Amortization of Intangible Assets, Total	$ 0.1		$ 0.1

Note 6 - Goodwill and Other I_4

Note 6 - Goodwill and Other Intangibles - Goodwill (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2021USD ($)
March 31, 2021	$ 34,634
September 30, 2021	43,471
Grid [Member]
March 31, 2021	34,634
Neeltran Acquisition	8,837
Less impairment loss	0
September 30, 2021	$ 43,471

Note 6 - Goodwill and Other I_5

Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2021	Mar. 31, 2021
Accumulated Amortization	$ (5,406)	$ (4,117)
Net Book Value	10,845
Intangible assets, gross amount	18,051	13,270
Intangible assets, net	12,645	9,153
Trade Names [Member]
Trade name	1,800	600
Backlog [Member]
Gross Amount	681	600
Accumulated Amortization	(552)	(475)
Net Book Value	$ 129	125
Estimated Useful Life (Year)	2 years
Customer Relationships [Member]
Gross Amount	$ 9,600	6,100
Accumulated Amortization	(1,710)	(739)
Net Book Value	$ 7,890	5,361
Estimated Useful Life (Year)	7 years
Core Technology and Know-how [Member]
Gross Amount	$ 5,970	5,970
Accumulated Amortization	(3,144)	(2,903)
Net Book Value	$ 2,826	$ 3,067
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 I_6

Note 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2021USD ($)
2022	$ 1,358
2023	2,772
2024	2,152
2025	1,648
2026	1,221
Thereafter	1,694
Total	$ 10,845

Note 7 - Fair Value Measureme_3

Note 7 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2020	Oct. 01, 2020
Marketable Securities, Total	$ 0
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Total	$ 0	$ (200)	$ (100)
Northeast Power Systems, Inc (NEPSI) [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)	1,000,000			1,000,000
Certificates of Deposit [Member]
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Total		$ 100	$ 100

Note 7 - Fair Value Measureme_4

Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Oct. 01, 2020
Marketable securities	$ 0
Fair value	4,700	$ 7,200	$ 7,100	$ 6,700	$ 4,000
Reported Value Measurement [Member] | Fair Value, Recurring [Member]
Cash equivalents	20,108		54,104
Marketable securities	0		5,140
Fair value	4,720		7,050
Reported Value Measurement [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	20,108		54,104
Marketable securities	0		5,140
Fair value	0
Reported Value Measurement [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0
Marketable securities	0
Fair value	0
Reported Value Measurement [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0
Marketable securities	0
Fair value	$ 4,720		$ 7,050

Note 7 - Fair Value Measureme_5

Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair value (Details) - Derivative Financial Instruments, Liabilities [Member] $ in Thousands	6 Months Ended
	Sep. 30, 2021USD ($)
Balance	$ 7,050
Change in fair value	(2,330)
Balance	$ 4,720

Note 8 - Accounts Receivable -

Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Accounts receivable (billed)	$ 16,381	$ 7,502
Accounts receivable (unbilled)	8,796	5,765
Accounts receivable, net	$ 25,177	$ 13,267

Note 9 - Inventory (Details Tex

Note 9 - Inventory (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Inventory Write-down	$ 600	$ 500	$ 1,203	$ 1,250

Note 9 - Inventory - Summary of

Note 9 - Inventory - Summary of Net Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Raw materials	$ 11,396	$ 8,255
Work-in-process	7,533	3,297
Finished goods	1,815	777
Deferred program costs	830	977
Net inventory	$ 21,574	$ 13,306

Note 10 - Property, Plant and_3

Note 10 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Depreciation, Depletion and Amortization, Total	$ 0.7	$ 0.9	$ 1.3	$ 1.8

Note 10 - Property, Plant and_4

Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Property, plant and equipment, gross	$ 58,315	$ 51,413
Less accumulated depreciation	(43,704)	(42,416)
Property, plant and equipment, net	14,611	8,997
Construction in Progress [Member]
Property, plant and equipment, gross	432	220
Land [Member]
Property, plant and equipment, gross	980	270
Building [Member]
Property, plant and equipment, gross	5,270	1,630
Equipment and Software [Member]
Property, plant and equipment, gross	43,714	41,652
Finance Lease, Right-of-use [Member]
Property, plant and equipment, gross	11	0
Furniture and Fixtures [Member]
Property, plant and equipment, gross	1,385	1,333
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 6,523	$ 6,308

Note 11 - Accounts Payable an_3

Note 11 - Accounts Payable and Accrued Expenses (Details Textual)	6 Months Ended
	Sep. 30, 2021
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

Note 11 - Accounts Payable an_4

Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Accounts payable	$ 14,920	$ 5,353
Accrued inventories in-transit	1,772	1,460
Accrued other miscellaneous expenses	2,993	2,369
Advanced deposits	1,479	1,035
Accrued compensation	3,932	7,018
Income taxes payable	640	522
Accrued product warranty	2,155	2,053
Total	$ 27,891	$ 19,810

Note 11 - Accounts Payable an_5

Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Balance at beginning of period	$ 2,187	$ 2,168	$ 2,053	$ 2,015
Acquired warranty obligations	0	0	248	0
Change in accruals for warranties during the period	206	148	314	384
Settlements during the period	(238)	(207)	(460)	(290)
Balance at end of period	$ 2,155	$ 2,109	$ 2,155	$ 2,109

Note 12 - Income Taxes (Details

Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Expense (Benefit), Total	$ 181	$ 191	$ (1,947)	$ 380
Deferred Tax Liabilities, Other Finite-Lived Assets	2,300		2,300
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			(2,300)
Liability for Uncertainty in Income Taxes, Current	0		0
Unrecognized Tax Benefits, Ending Balance	$ 0		$ 0

Note 13 - Contingent Consider_3

Note 13 - Contingent Consideration (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ (2,430)	$ 0	$ (2,330)	$ 0

Note 13 - Contingent Consider_4

Note 13 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) $ in Millions	Sep. 30, 2021USD ($)d	Jun. 30, 2021USD ($)d	Mar. 31, 2021USD ($)d	Dec. 31, 2020USD ($)d	Oct. 01, 2020USD ($)
Fair value | $	$ 4.7	$ 7.2	$ 7.1	$ 6.7	$ 4
Measurement Input, Revenue Risk Premium [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.0660	0.0660	0.0670	0.0690	0.0710
Measurement Input, Revenue Volatility [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.30	0.30	0.30	0.30	0.30
Measurement Input, Share Price [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input	14.58	17.39	18.96	23.42	14.23
Measurement Input, Payment Delay [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input | d	80	80	80	80

Note 14 - Debt (Details Textual

Note 14 - Debt (Details Textual) $ in Thousands	Sep. 30, 2021USD ($)	May 06, 2021	Mar. 31, 2021USD ($)
Debt, Current, Total	$ 72		$ 0
Long-term Debt, Excluding Current Maturities, Total	125		$ 0
Equipment Financing Agreements Assumed In Business Acquisition [Member]
Debt, Current, Total	100
Long-term Debt, Excluding Current Maturities, Total	$ 100
Neeltran Inc. [Member]
Business Combination, Number of Equipment Financing Agreement Assumed		4

Note 15 - Leases (Details Textu

Note 15 - Leases (Details Textual) - USD ($)	Sep. 30, 2021	May 06, 2021	Mar. 31, 2021	Feb. 29, 2020
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	$ 10,700		$ 0
Finance Lease, Right-of-Use Asset, Accumulated Amortization	$ 2,500
Finance Lease, Liability, Total		$ 13,200
Neeltran Inc. [Member]
Lessee, Finance Lease, Term of Contract (Month)				39 months
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years

Note 15 - Leases - Operating Le

Note 15 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($)	Sep. 30, 2021	Mar. 31, 2021
Right-of-use assets - Financing	$ 10,700	$ 0
Right-of-use assets	3,588,000	3,747,000
Total right-of-use assets	3,599,000	3,747,000
Lease liabilities - ST Financing	5,000	0
Lease liabilities - ST Operating	700,000	612,000
Lease liabilities - LT Financing	5,000	0
Lease liabilities - LT Operating	3,007,000	3,246,000
Total lease liabilities	$ 3,717,000	$ 3,858,000
Weighted-average remaining lease term (Year)	5 years 3 months 14 days	5 years 9 months 25 days
Weighted-average discount rate	6.58%	6.72%

Note 15 - Leases - Lease Cost (

Note 15 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating lease costs - fixed	$ 238	$ 214	$ 469	$ 392
Operating lease costs - variable	32	28	63	55
Short-term lease costs	65	510	131	678
Total lease costs	$ 335	$ 752	$ 663	$ 1,125

Note 15 - Leases - Minimum Futu

Note 15 - Leases - Minimum Future Lease Obligation (Details) $ in Thousands	Sep. 30, 2021USD ($)
2022	$ 460
2023	886
2024	798
2025	674
2026	672
Thereafter	934
Total minimum lease payments	4,424
Less: interest	707
Present value of lease liabilities	$ 3,717

Note 16 - Commitments and Con_2

Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Mar. 31, 2020
Restricted Cash and Cash Equivalents, Noncurrent, Total	$ 6,165	$ 5,568	$ 5,600
Restricted Cash and Cash Equivalents, Current, Total	2,300	$ 2,200
Letter of Credit [Member]
Escrow Deposit	$ 5,000

Note 17 - Business Segments (De

Note 17 - Business Segments (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)
Number of Reportable Segments			2
Number of Operating Segments			2
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ (2,430)	$ 0	$ (2,330)	$ 0
Share-based Payment Arrangement, Expense	1,101	849	2,393	1,758
Corporate, Non-Segment [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2,400		2,300
Share-based Payment Arrangement, Expense	$ 1,100	$ 800	$ 2,400	$ 1,800

Note 17 - Business Segments - O

Note 17 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 27,908	$ 21,117	$ 53,328	$ 42,329
Operating Income (loss)	(4,302)	(3,206)	(11,801)	(6,423)
Corporate, Non-Segment [Member]
Operating Income (loss)	1,329	(849)	(63)	(1,758)
Grid [Member]
Revenues	24,619	16,347	48,119	34,062
Grid [Member] | Operating Segments [Member]
Operating Income (loss)	(5,836)	(1,374)	(11,180)	(2,562)
Wind [Member]
Revenues	3,289	4,770	5,209	8,267
Wind [Member] | Operating Segments [Member]
Operating Income (loss)	$ 205	$ (983)	$ (558)	$ (2,103)

Note 17 - Business Segments - T

Note 17 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Total assets	$ 184,373	$ 168,866
Operating Segments [Member] | Grid [Member]
Total assets	118,503	81,253
Operating Segments [Member] | Wind [Member]
Total assets	8,221	6,098
Corporate, Non-Segment [Member]
Total assets	$ 57,649	$ 81,515