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Note 20 - Business Segments (Tables) | 12 Months Ended
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Mar. 31, 2024
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Fiscal Years Ended March 31, |
|  | 2024 |  |  | 2023 |
Revenues: |  |  |  |  |  |  |  |
Grid |  | $ | 122,065 |  |  | $ | 94,631 |
Wind |  |  | 23,574 |  |  |  | 11,353 |
Total |  | $ | 145,639 |  |  | $ | 105,984 |
|  | Fiscal Years Ended March 31, |
|  | 2024 |  |  | 2023 |
Operating income (loss): |  |  |  |  |  |  |  |
Grid |  | $ | (2,754 | ) |  | $ | (24,615 | )
Wind |  |  | 946 |  |  |  | (2,547 | )
Unallocated corporate expenses |  |  | (9,560 | ) |  |  | (5,847 | )
Total |  | $ | (11,368 | ) |  | $ | (33,009 | )
Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
|  | March 31, 2024 |  |  | March 31, 2023 |
Grid |  | $ | 125,878 |  |  | $ | 135,296 |
Wind |  |  | 14,733 |  |  |  | 14,361 |
Corporate assets |  |  | 92,160 |  |  |  | 25,904 |
Total |  | $ | 232,771 |  |  | $ | 175,561 |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
|  | March 31, |
|  | 2024 |  |  | 2023 |
North America |  | $ | 10,679 |  |  | $ | 12,125 |
Europe |  |  | 149 |  |  |  | 141 |
Asia Pacific |  |  | 33 |  |  |  | 43 |
Total |  | $ | 10,861 |  |  | $ | 12,309 |

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