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Note 21 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues	$ 105,984	$ 108,435
Operating Income (loss)	(33,009)	(21,089)
Corporate, Non-Segment [Member]
Operating Income (loss)	(5,847)	1,190
Grid [Member]
Revenues	94,631	98,876
Grid [Member] | Operating Segments [Member]
Operating Income (loss)	(24,615)	(20,725)
Wind [Member]
Revenues	11,353	9,559
Wind [Member] | Operating Segments [Member]
Operating Income (loss)	$ (2,547)	$ (1,554)

X

- Definition

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

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