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Note 11 - Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Jan. 31, 2022
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | January 31, 2022 |  |  | January 31, 2021 |
|  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Average |  |  | Gross |  |  |  |  |  |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  |  |  |  |  |  | Net |
|  | Life at |  |  | Carrying |  |  | Accumulated |  |  |  |  |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  |  |  |  |  | Carrying |
|  | 1/31/2022 |  |  | Amount |  |  | Amortization |  |  | Impairment |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Impairment |  |  | Amount |
|  |  |  |  |  | (in thousands) |  |  | (in thousands) |
Goodwill |  |  |  |  |  | $ | 7,060 |  |  | $ | — |  |  | $ | (7,060 | ) |  | $ | — |  |  | $ | 7,060 |  |  | $ | — |  |  | $ | (7,060 | ) |  | $ | — |
Proprietary rights |  |  | 6.0 |  |  | $ | 8,237 |  |  | $ | (4,150 | ) |  |  | — |  |  |  | 4,087 |  |  | $ | 7,781 |  |  | $ | (3,688 | ) |  |  | — |  |  |  | 4,093 |
Customer relationships |  |  | 0.4 |  |  |  | 5,024 |  |  |  | (4,797 | ) |  |  | — |  |  |  | 227 |  |  |  | 5,024 |  |  |  | (4,513 | ) |  |  | — |  |  |  | 511 |
Patents |  |  | 2.9 |  |  |  | 2,540 |  |  |  | (1,778 | ) |  |  | — |  |  |  | 762 |  |  |  | 2,440 |  |  |  | (1,528 | ) |  |  | — |  |  |  | 912 |
Trade name |  |  | 4.3 |  |  |  | 894 |  |  |  | (85 | ) |  |  | (760 | ) |  |  | 49 |  |  |  | 894 |  |  |  | (74 | ) |  |  | (760 | ) |  |  | 60 |
Developed technology |  |  | 3.9 |  |  |  | 1,430 |  |  |  | (870 | ) |  |  | — |  |  |  | 560 |  |  |  | 1,430 |  |  |  | (727 | ) |  |  | — |  |  |  | 703 |
Other |  |  | 2.3 |  |  |  | 694 |  |  |  | (361 | ) |  |  | — |  |  |  | 333 |  |  |  | 684 |  |  |  | (213 | ) |  |  | — |  |  |  | 471 |
Amortizable intangible assets |  |  |  |  |  | $ | 18,819 |  |  | $ | (12,041 | ) |  | $ | (760 | ) |  | $ | 6,018 |  |  | $ | 18,253 |  |  | $ | (10,743 | ) |  | $ | (760 | ) |  | $ | 6,750 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
For fiscal year ending January 31: |  |  |  |
2023 |  | $ | 1,185 |
2024 |  |  | 1,050 |
2025 |  |  | 820 |
2026 |  |  | 726 |
2027 |  |  | 425 |
Thereafter |  |  | 1,812 |
Total |  | $ | 6,018 |

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