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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)

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