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Note 6 - Goodwill and Other Intangibles (Tables) | 6 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | September 30, 2025 |  |  | March 31, 2025 |  |  |  |  |
|  | Gross Amount |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Gross Amount |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Estimated Useful Life |
Backlog |  |  | 1,381 |  |  |  | (1,381 | ) |  |  | — |  |  |  | 1,381 |  |  |  | (1,381 | ) |  |  | — |  |  |  | 2 |
Trade name and trademarks |  |  | 1,800 |  |  |  | — |  |  |  | 1,800 |  |  |  | 1,800 |  |  |  | — |  |  |  | 1,800 |  |  | Indefinite |
Customer relationships |  |  | 10,880 |  |  |  | (8,332 | ) |  |  | 2,548 |  |  |  | 10,880 |  |  |  | (7,901 | ) |  |  | 2,980 |  |  |  | 7-10 |
Core technology and know-how |  |  | 5,970 |  |  |  | (5,076 | ) |  |  | 894 |  |  |  | 5,970 |  |  |  | (4,834 | ) |  |  | 1,136 |  |  |  | 5-10 |
Intangible assets |  | $ | 20,031 |  |  | $ | (14,789 | ) |  | $ | 5,242 |  |  | $ | 20,031 |  |  | $ | (14,116 | ) |  | $ | 5,916 |  |  |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Years ending March 31, |  | Total |
2026 (remaining) |  |  | 674 |
2027 |  |  | 1,213 |
2028 |  |  | 671 |
2029 |  |  | 201 |
2030 |  |  | 128 |
Thereafter |  |  | 555 |
Total |  | $ | 3,442 |

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