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Note 18 - Business Segments (Tables) | 6 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Six Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid |  | $ | 28,515 |  |  | $ | 25,698 |  |  | $ | 54,251 |  |  | $ | 45,527 |
Wind |  |  | 5,489 |  |  |  | 1,982 |  |  |  | 10,007 |  |  |  | 4,833 |
Total |  | $ | 34,004 |  |  | $ | 27,680 |  |  | $ | 64,258 |  |  | $ | 50,360 |
|  | Three Months Ended September 30, |  |  | Six Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Operating income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid |  | $ | (679 | ) |  | $ | (6,495 | ) |  | $ | (2,649 | ) |  | $ | (13,776 | )
Wind |  |  | 252 |  |  |  | (868 | ) |  |  | (398 | ) |  |  | (1,254 | )
Unallocated corporate expenses |  |  | (1,942 | ) |  |  | (729 | ) |  |  | (4,655 | ) |  |  | (1,931 | )
Total |  | $ | (2,369 | ) |  | $ | (8,092 | ) |  | $ | (7,702 | ) |  | $ | (16,961 | )
Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |
Grid |  | $ | 137,607 |  |  | $ | 135,296 |
Wind |  |  | 9,750 |  |  |  | 14,361 |
Corporate assets |  |  | 23,970 |  |  |  | 25,904 |
Total |  | $ | 171,327 |  |  | $ | 175,561 |

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