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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, 2025 | Dec. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024
Revenues | $ 74,529 |  | $ 61,403 |  | $ 212,749 |  | $ 156,163 |
Segment other operating expenses | 71,170 | [1],[2] | 60,088 | [3],[4] | 200,782 | [1],[2] | 158,893 | [3],[4]
Segment operating income | 3,359 | [2] | 1,315 | [4] | 11,967 | [2] | (2,730) | [4]
Operating income (loss): | 3,359 | [2] | 1,315 | [4] | 11,967 | [2] | (2,730) | [4]
Interest income, net | 1,997 |  | 802 |  | 5,198 |  | 2,901 |
Other (expense)/income, net | 77 |  | 272 |  | 57 |  | (214) |
Income (loss) before income tax benefit | 5,433 |  | 2,389 |  | 17,222 |  | (43) |
Depreciation and amortization | 1,789 |  | 1,589 |  | 4,184 |  | 3,984 |
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] |  |  |  |  |  |  |  |
Revenues | 0 |  | 0 |  | 0 |  | 0 |
Segment other operating expenses | 0 | [1],[2] | 0 | [3],[4] | 0 | [1],[2] | 6,689 | [3],[4]
Segment operating income | 0 | [2] | 0 | [4] | 0 | [2] | (6,689) | [4]
Operating income (loss): | 0 | [2] | 0 | [4] | 0 | [2] | (6,689) | [4]
Grid [Member] |  |  |  |  |  |  |  |
Revenues | 63,187 |  | 52,306 |  | 177,616 |  | 131,578 |
Grid [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |
Revenues | 63,187 |  | 52,306 |  | 177,616 |  | 131,578 |
Segment other operating expenses | 61,156 | [1],[2] | 52,072 | [3],[4] | 170,152 | [1],[2] | 130,006 | [3],[4]
Segment operating income | 2,031 | [2] | 234 | [4] | 7,464 | [2] | 1,572 | [4]
Operating income (loss): | 2,031 | [2] | 234 | [4] | 7,464 | [2] | 1,572 | [4]
Depreciation and amortization | 1,726 |  | 1,567 |  | 4,089 |  | 3,920 |
Wind [Member] |  |  |  |  |  |  |  |
Revenues | 11,342 |  | 9,097 |  | 35,133 |  | 24,585 |
Wind [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |
Revenues | 11,342 |  | 9,097 |  | 35,133 |  | 24,585 |
Segment other operating expenses | 10,014 | [1],[2] | 8,016 | [3],[4] | 30,630 | [1],[2] | 22,198 | [3],[4]
Segment operating income | 1,328 | [2] | 1,081 | [4] | 4,503 | [2] | 2,387 | [4]
Operating income (loss): | 1,328 | [2] | 1,081 | [4] | 4,503 | [2] | 2,387 | [4]
Depreciation and amortization | $ 63 |  | $ 22 |  | $ 95 |  | $ 64 |
[1] | Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, and amortization of acquisition related intangibles.
[2] | The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.
[3] | Segment other operating expense includes cost of sales, research and development expense, selling general, and administrative expense, amortization of acquisition related intangibles, and gain/loss on contingent consideration.
[4] | The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.

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