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Note 2 - Revenue Recognition (Tables)

9 Months Ended

Dec. 31, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended December 31, 2019								Nine Months Ended December 31, 2019
Product Line:		Grid				Wind				Grid				Wind
Equipment and systems		$	14,040			$	2,160			$	32,438			$	7,742
Services and technology development			1,192				523				4,139				1,379
Total		$	15,232			$	2,683			$	36,577			$	9,120
Region:
Americas		$	10,164			$	2			$	28,663			$	49
Asia Pacific			330				2,647				2,550				8,968
EMEA			4,738				34				5,364				104
Total		$	15,232			$	2,683			$	36,577			$	9,120

		Three Months Ended December 31, 2018								Nine Months Ended December 31, 2018
Product Line:		Grid				Wind				Grid				Wind
Equipment and systems		$	4,614			$	7,215			$	17,571			$	17,925
Services and technology development			2,212				93				5,754				368
Total		$	6,826			$	7,308			$	23,325			$	18,293
Region:
Americas		$	3,771			$	36			$	16,319			$	82
Asia Pacific			2,815				7,263				5,930				18,136
EMEA			240				9				1,076				75
Total		$	6,826			$	7,308			$	23,325			$	18,293

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

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

		Unbilled Accounts Receivable				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2018		$	3,016			$	2,567			$	21,937
Impact of adoption of ASC 606			—				(1,599	)			(2,657	)
Increases for costs incurred to fulfill performance obligations			—				1,461				—
Increase (decrease) due to customer billings			(11,063	)			—				11,167
Decrease due to cost recognition on completed performance obligations			—				(1,132	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			9,722				(9	)			(11,345	)
Other changes and FX impact			(53	)			8				(1,040	)
Ending balance as of December 31, 2018		$	1,622			$	1,296			$	18,062

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

			Three Months Ended								Nine Months Ended
	Reportable		December 31,								December 31,
	Segment		2019				2018				2019				2018
Inox Wind Limited	Wind			<10%				47	%			11	%			40	%
Department of Homeland Security	Grid			22	%			<10%				12	%			<10%
Vestas	Grid			25	%			<10%				10	%			15	%
Fuji Bridex Pte. Ltd.	Grid			<10%				17	%			<10%				<10%

X

- Definition

Tabular disclosure of contract balances and changes in contract balances.

+ 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=118956577&loc=SL49130551-203045

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