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Note 20 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Revenues | $ 145,639 | $ 105,984
Operating Income (loss) | (11,368) | (33,009)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |
Operating Income (loss) | (9,560) | (5,847)
Grid [Member] |  |
Revenues | 122,065 | 94,631
Grid [Member] | Operating Segments [Member] |  |
Revenues | 122,065 | 94,631
Operating Income (loss) | (2,754) | (24,615)
Wind [Member] |  |
Revenues | 23,574 | 11,353
Wind [Member] | Operating Segments [Member] |  |
Revenues | 23,574 | 11,353
Operating Income (loss) | $ 946 | $ (2,547)

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