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Note 19 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Revenues | $ 108,435 | $ 87,125 | $ 108,435 | $ 87,125
Operating Income (loss) | $ (21,089) | $ (23,165) | (21,089) | (23,165)
Corporate, Non-Segment [Member] |  |  |  |
Operating Income (loss) |  |  | 1,190 | (6,545)
Grid [Member] |  |  |  |
Revenues |  |  | 98,876 | 70,528
Grid [Member] | Operating Segments [Member] |  |  |  |
Operating Income (loss) |  |  | (20,725) | (13,318)
Wind [Member] |  |  |  |
Revenues |  |  | 9,559 | 16,597
Wind [Member] | Operating Segments [Member] |  |  |  |
Operating Income (loss) |  |  | $ (1,554) | $ (3,302)

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