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Note 18 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Revenues | $ 39,353 | $ 23,881 | $ 103,611 | $ 74,241
Operating Income (loss) | (1,438) | (9,209) | (9,141) | (26,170)
Corporate, Non-Segment [Member] |  |  |  |
Operating Income (loss) | (1,992) | (1,221) | (6,646) | (3,152)
Grid [Member] |  |  |  |
Revenues | 33,603 | 20,809 | 87,854 | 66,337
Grid [Member] | Operating Segments [Member] |  |  |  |
Revenues | 33,603 | 20,809 | 87,854 | 66,337
Operating Income (loss) | 268 | (7,064) | (2,383) | (20,840)
Wind [Member] |  |  |  |
Revenues | 5,750 | 3,072 | 15,757 | 7,904
Wind [Member] | Operating Segments [Member] |  |  |  |
Revenues | 5,750 | 3,072 | 15,757 | 7,904
Operating Income (loss) | $ 286 | $ (924) | $ (112) | $ (2,178)

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