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Note 18 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 39,353	$ 23,881	$ 103,611	$ 74,241
Operating Income (loss)	(1,438)	(9,209)	(9,141)	(26,170)
Corporate, Non-Segment [Member]
Operating Income (loss)	(1,992)	(1,221)	(6,646)	(3,152)
Grid [Member]
Revenues	33,603	20,809	87,854	66,337
Grid [Member] | Operating Segments [Member]
Revenues	33,603	20,809	87,854	66,337
Operating Income (loss)	268	(7,064)	(2,383)	(20,840)
Wind [Member]
Revenues	5,750	3,072	15,757	7,904
Wind [Member] | Operating Segments [Member]
Revenues	5,750	3,072	15,757	7,904
Operating Income (loss)	$ 286	$ (924)	$ (112)	$ (2,178)

X

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The net result for the period of deducting operating expenses from operating revenues.

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