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Note 5 - Goodwill and Other Intangibles (Tables) | 6 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |  |  |  |  |
|  | Gross Amount |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Gross Amount |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Estimated Useful Life |
Backlog |  |  | 681 |  |  |  | (681 | ) |  |  | — |  |  |  | 681 |  |  |  | (675 | ) |  | $ | 6 |  |  |  | 2 |
Trade name and trademarks |  |  | 1,800 |  |  |  | — |  |  |  | 1,800 |  |  |  | 1,800 |  |  |  | — |  |  |  | 1,800 |  |  | Indefinite |
Customer relationships |  |  | 9,600 |  |  |  | (5,815 | ) |  |  | 3,785 |  |  |  | 9,600 |  |  |  | (4,980 | ) |  |  | 4,620 |  |  |  | 7 |
Core technology and know-how |  |  | 5,970 |  |  |  | (4,110 | ) |  |  | 1,860 |  |  |  | 5,970 |  |  |  | (3,869 | ) |  |  | 2,101 |  |  |  | 5-10 |
Intangible assets |  | $ | 18,051 |  |  | $ | (10,606 | ) |  | $ | 7,445 |  |  | $ | 18,051 |  |  | $ | (9,524 | ) |  | $ | 8,527 |  |  |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Years ending March 31, |  | Total |
2024 |  |  | 1,076 |
2025 |  |  | 1,648 |
2026 |  |  | 1,221 |
2027 |  |  | 1,085 |
2028 |  |  | 543 |
Thereafter |  |  | 72 |
Total |  | $ | 5,645 |

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