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Note 9 - Intangible Assets (Tables) | 9 Months Ended
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Oct. 31, 2023
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | October 31, 2023 |  |  | January 31, 2023 |
|  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Average Life at |  |  | Gross Carrying |  |  | Accumulated |  |  | Net Carrying |  |  | Gross Carrying |  |  | Accumulated |  |  | Net Carrying |
|  | October 31, 2023 |  |  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
|  |  |  |  |  | (in thousands) |  |  | (in thousands) |
Proprietary rights |  |  | 5.1 |  |  |  | 7,473 |  |  |  | (4,943 | ) |  |  | 2,530 |  |  |  | 7,473 |  |  |  | (4,612 | ) |  |  | 2,861 |
Customer relationships |  |  | 0.1 |  |  |  | 4,884 |  |  |  | (4,827 | ) |  |  | 57 |  |  |  | 4,884 |  |  |  | (4,754 | ) |  |  | 130 |
Patents |  |  | 1.6 |  |  |  | 2,540 |  |  |  | (2,140 | ) |  |  | 400 |  |  |  | 2,540 |  |  |  | (2,027 | ) |  |  | 513 |
Trade name |  |  | 2.6 |  |  |  | 134 |  |  |  | (105 | ) |  |  | 29 |  |  |  | 134 |  |  |  | (97 | ) |  |  | 37 |
Other |  |  | 0.4 |  |  |  | 396 |  |  |  | (339 | ) |  |  | 57 |  |  |  | 375 |  |  |  | (283 | ) |  |  | 92 |
Intangible assets |  |  |  |  |  | $ | 15,427 |  |  | $ | (12,354 | ) |  | $ | 3,073 |  |  | $ | 15,406 |  |  | $ | (11,773 | ) |  | $ | 3,633 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
For fiscal years ending January 31, |  |  | (in thousands) |
2024 |  | $ | 333 |
2025 |  |  | 538 |
2026 |  |  | 514 |
2027 |  |  | 316 |
2028 |  |  | 316 |
Thereafter |  |  | 898 |
Total |  | $ | 2,915 |

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