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Note 3 - Revenue Recognition (Tables)

6 Months Ended

Sep. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

		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

		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

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, 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			$	35,454

		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 balance 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

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

Three Months Ended

Six Months Ended

Reportable

September 30,

September 30,

Segment

2022

2021

2022

2021

Inox Wind Limited

Wind

<10%

10

%

<10%

<10%

Fuji Bridex Pte Ltd

Grid

17

%

<10%

13

%

<10%

Tri-State Generation and Transmission Association, Inc.

Grid

<10%

12

%

<10%

<10%

Micron Technology

Grid

<10%

<10%

<10%

10

%

Ascend Performance Materials Ops LLC

Grid

12

%

<10%

<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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

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