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Note 19 - Business Segments (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Fiscal Years Ended March 31,
		2022				2021
Revenues:
Grid		$	98,876			$	70,528
Wind			9,559				16,597
Total		$	108,435			$	87,125

		Fiscal Years Ended March 31,
		2022				2021
Operating income (loss):
Grid		$	(20,725	)		$	(13,318	)
Wind			(1,554	)			(3,302	)
Unallocated corporate expenses			1,190				(6,545	)
Total		$	(21,089	)		$	(23,165	)

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

		March 31, 2022				March 31, 2021
Grid		$	114,053			$	81,253
Wind			9,866				6,098
Corporate assets			49,968				81,515
Total		$	173,887			$	168,866

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

		March 31,
		2022				2021
North America		$	13,446			$	8,777
Europe			166				174
Asia Pacific			44				46
Total		$	13,656			$	8,997

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