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Note 9 - Intangible Assets | 9 Months Ended
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Oct. 31, 2023
Notes to Financial Statements |
Goodwill and Intangible Assets Disclosure [Text Block] | 9. Intangible Assets
|  |  |  |  |  | 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 |
Approximately $158,000 of the gross carrying amount of intangible assets, primarily in proprietary rights, are related to technology development projects that have not yet been completed. As a result, these intangible assets are not currently being amortized. On January 31, 2023, the Company completed an annual review of amortizable intangible assets. Based on a review of qualitative factors, it was determined that there were no events or changes in circumstances indicating that the carrying value of amortizable intangible assets was not recoverable. During the nine months ended October 31, 2023, there have been no substantive indicators of impairment. Aggregate amortization expense was $591,000 and $667,000 for the nine months ended October 31, 2023 and 2022, respectively, and approximately $173,000 and $222,000 for the three months ended October 31, 2023 and 2022, respectively. As of October 31, 2023, future estimated amortization expense related to amortizable intangible assets was estimated to be:
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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