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Note 2 - Revenue Recognition (Tables)

6 Months Ended

Sep. 30, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended September 30, 2023								Six Months Ended September 30, 2023
Product Line:		Grid				Wind				Grid				Wind
Equipment and systems		$	22,682			$	4,879			$	45,808			$	8,862
Services and technology development			5,833				610				8,443				1,145
Total		$	28,515			$	5,489			$	54,251			$	10,007
Region:
Americas		$	24,696			$	27			$	47,856			$	57
Asia Pacific			3,418				5,462				5,129				9,928
EMEA			401				—				1,266				22
Total		$	28,515			$	5,489			$	54,251			$	10,007

		Three Months Ended September 30, 2022								Six Months Ended September 30, 2022
Product Line:		Grid				Wind				Grid				Wind
Equipment and systems		$	24,128			$	1,330			$	42,204			$	3,302
Services and technology development			1,570				652				3,323				1,531
Total		$	25,698			$	1,982			$	45,527			$	4,833
Region:
Americas		$	18,021			$	-			$	34,923			$	-
Asia Pacific			6,178				1,912				8,855				4,763
EMEA			1,499				70				1,749				70
Total		$	25,698			$	1,982			$	45,527			$	4,833

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, 2023		$	9,958			$	2,136			$	50,760
Increases for costs incurred to fulfill performance obligations			—				2,110				—
Increase (decrease) due to customer billings			(13,981	)			—				34,284
Decrease due to cost recognition on completed performance obligations			—				(2,160	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			10,351				—				(25,710	)
Other changes and FX impact			7				(11	)			(288	)
Ending balance as of September 30, 2023		$	6,335			$	2,075			$	59,046

		Unbilled Accounts Receivable				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2022		$	6,492			$	858			$	30,034
Increases for costs incurred to fulfill performance obligations			—				782				—
Increase (decrease) due to customer billings			(7,322	)			—				33,141
Decrease due to cost recognition on completed performance obligations			—				(697	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			7,342				—				(26,857	)
Other changes and FX impact			—				(47	)			(863	)
Ending balance as of September 30, 2022		$	6,512			$	896			$	35,455

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

			Three Months Ended								Six Months Ended
	Reportable		September 30,								September 30,
	Segment		2023				2022				2023				2022
Inox Wind Limited	Wind			12	%		<10%					12	%		<10%
Fuji Bridex Pte Ltd	Grid			<10%				17	%			<10%				13	%
Gray Construction, Inc.	Grid			11	%			<10%				<10%				<10%
Ascend Performance Materials Ops LLC	Grid			<10%				12	%			<10%				<10%

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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