Note 15 - Business Segments (Tables)

6 Months Ended

Sep. 30, 2020

Notes Tables

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

	Three Months Ended September 30,				Six Months Ended September 30,
	2020		2019		2020		2019
Revenues:
Grid	$	16,347	$	11,489	$	34,062	$	21,345
Wind		4,770		2,523		8,267		6,437
Total	$	21,117	$	14,012	$	42,329	$	27,782

	Three Months Ended September 30,						Six Months Ended September 30,
	2020			2019			2020			2019
Operating loss:
Grid	$	(1,374	)	$	(1,324	)	$	(2,562	)	$	(5,988	)
Wind		(983	)		(2,398	)		(2,103	)		(3,721	)
Unallocated corporate expenses		(849	)		(397	)		(1,758	)		(646	)
Total	$	(3,206	)	$	(4,119	)	$	(6,423	)	$	(10,355	)

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

	September 30, 2020		March 31, 2020
Grid	$	40,358	$	44,044
Wind		11,760		14,250
Corporate assets		59,109		65,815
Total	$	111,227	$	124,109