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Note 9 - Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Oct. 31, 2023 | Jan. 31, 2023
--- | --- | ---
Amortizable intangible assets, gross carrying amount | $ 15,427 | $ 15,406
Amortizable intangible assets, accumulated amortization | (12,354) | (11,773)
Intangible assets, net | 3,073 | 3,633
Proprietary Rights [Member] |  |
Amortizable intangible assets, gross carrying amount | 7,473 | 7,473
Amortizable intangible assets, accumulated amortization | (4,943) | (4,612)
Intangible assets, net | $ 2,530 | 2,861
Proprietary Rights [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 5 years 1 month 6 days |
Customer Relationships [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 4,884 | 4,884
Amortizable intangible assets, accumulated amortization | (4,827) | (4,754)
Intangible assets, net | $ 57 | 130
Customer Relationships [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 1 month 6 days |
Patents [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 2,540 | 2,540
Amortizable intangible assets, accumulated amortization | (2,140) | (2,027)
Intangible assets, net | $ 400 | 513
Patents [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 1 year 7 months 6 days |
Trade Names [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 134 | 134
Amortizable intangible assets, accumulated amortization | (105) | (97)
Intangible assets, net | $ 29 | 37
Trade Names [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 2 years 7 months 6 days |
Other Intangible Assets [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 396 | 375
Amortizable intangible assets, accumulated amortization | (339) | (283)
Intangible assets, net | $ 57 | $ 92
Other Intangible Assets [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 4 months 24 days |

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