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Note 17 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Revenues | $ 40,290 | $ 30,254
Operating Income (loss) | (3,291) | (5,333)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |
Operating Income (loss) | (5,149) | (2,713)
Grid [Member] |  |
Revenues | 32,336 | 25,737
Grid [Member] | Operating Segments [Member] |  |
Revenues | 32,336 | 25,737
Operating Income (loss) | 859 | (1,971)
Wind [Member] |  |
Revenues | 7,954 | 4,517
Wind [Member] | Operating Segments [Member] |  |
Revenues | 7,954 | 4,517
Operating Income (loss) | $ 999 | $ (649)

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