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Note 17 - Business Segments - Total Business Segments Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Total assets	$ 445,603	$ 310,521
Operating Segments [Member] | Grid [Member]
Total assets	209,101	211,520
Operating Segments [Member] | Wind [Member]
Total assets	17,665	13,697
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Total assets	$ 218,837	$ 85,304

X

- Definition

Amount of asset recognized for present right to economic benefit.

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