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Note 4 - Revenue Recognition (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Year Ended March 31, 2021
Product Line:		Grid				Wind
Equipment and systems		$	65,930			$	14,362
Services and technology development			4,598				2,235
Total		$	70,528			$	16,597
Region:
Americas		$	54,168			$	87
Asia Pacific			11,326				16,207
EMEA			5,034				303
Total		$	70,528			$	16,597

		Year Ended March 31, 2020
Product Line:		Grid				Wind
Equipment and systems		$	44,065			$	12,282
Services and technology development			5,520				1,971
Total		$	49,585			$	14,253
Region:
Americas		$	33,207			$	87
Asia Pacific			10,407				13,996
EMEA			5,971				170
Total		$	49,585			$	14,253

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

		Unbilled AR				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2020		$	5,711			$	1,631			$	26,142
Increases for balances acquired			101				—				2,700
Increases for costs incurred to fulfill performance obligations			—				7,674				—
Increase (decrease) due to customer billings			(8,687	)			—				52,988
Decrease due to cost recognition on completed performance obligations			—				(8,346	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			8,640				—				(61,183	)
Other changes and FX impact			—				18				610
Ending balance as of March 31, 2021		$	5,765			$	977			$	21,257

		Unbilled AR				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2019		$	2,213			$	318			$	15,521
Increases for costs incurred to fulfill performance obligations			—				4,844				—
Increase (decrease) due to customer billings			(11,516	)			—				47,877
Decrease due to cost recognition on completed performance obligations			—				(3,525	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			15,017				—				(37,009	)
Other changes and FX impact			(3	)			(6	)			(247	)
Ending balance as of March 31, 2020		$	5,711			$	1,631			$	26,142

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

				Year Ended
		Reportable		March 31,
		Segment		2021		2020
EPC Services Company		Grid		13%		0%
Department of Homeland Security		Grid		<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 http://asc.fasb.org/extlink&oid=123351226&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 http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

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