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Note 16 - Business Segments (Tables)

9 Months Ended

Dec. 31, 2020

Notes Tables

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

		Three Months Ended December 31,								Nine Months Ended December 31,
		2020				2019				2020				2019
Revenues:
Grid		$	17,086			$	15,232			$	51,149			$	36,577
Wind			6,546				2,683				14,812				9,120
Total		$	23,632			$	17,915			$	65,961			$	45,697

		Three Months Ended December 31,								Nine Months Ended December 31,
		2020				2019				2020				2019
Operating profit (loss):
Grid		$	(5,826	)		$	(3,732	)		$	(8,388	)		$	(9,723	)
Wind			147				(2,297	)			(1,956	)			(6,015	)
Unallocated corporate expenses			(3,579	)			(590	)			(5,337	)			(1,236	)
Total		$	(9,258	)		$	(6,619	)		$	(15,681	)		$	(16,974	)

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

		December 31, 2020				March 31, 2020
Grid		$	83,623			$	44,044
Wind			6,140				14,250
Corporate assets			85,284				65,815
Total		$	175,047			$	124,109

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Tabular disclosure of all significant reconciling items in the reconciliation of total assets from reportable segments to the entity's consolidated assets.

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