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Note 11 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 31, 2022 | Jan. 31, 2021
Goodwill, gross carrying amount | $ 7,060 | $ 7,060
Goodwill, impairment | (7,060) | (7,060)
Goodwill, net carrying amount | 0 | 0
Amortizable intangible assets, gross carrying amount | 18,819 | 18,253
Amortizable intangible assets, accumulated amortization | (12,041) | (10,743)
Intangible assets, net | 6,018 | 6,750
Amortizable intangible assets, impairment | (760) | (760)
Proprietary Rights [Member] |  |
Amortizable intangible assets, gross carrying amount | 8,237 | 7,781
Amortizable intangible assets, accumulated amortization | (4,150) | (3,688)
Intangible assets, net | $ 4,087 | 4,093
Proprietary Rights [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 6 years |
Customer Relationships [Member] |  |
Weighted average life (Year) | 8 years |
Amortizable intangible assets, gross carrying amount | $ 5,024 | 5,024
Amortizable intangible assets, accumulated amortization | (4,797) | (4,513)
Intangible assets, net | $ 227 | 511
Customer Relationships [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 4 months 24 days |
Patents [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 2,540 | 2,440
Amortizable intangible assets, accumulated amortization | (1,778) | (1,528)
Intangible assets, net | $ 762 | 912
Patents [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 2 years 10 months 24 days |
Trade Names [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 894 | 894
Amortizable intangible assets, accumulated amortization | (85) | (74)
Intangible assets, net | 49 | 60
Amortizable intangible assets, impairment | $ (760) | (760)
Trade Names [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 4 years 3 months 18 days |
Developed Technology Rights [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 1,430 | 1,430
Amortizable intangible assets, accumulated amortization | (870) | (727)
Intangible assets, net | $ 560 | 703
Developed Technology Rights [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 3 years 10 months 24 days |
Other Intangible Assets [Member] |  |
Amortizable intangible assets, gross carrying amount | $ 694 | 684
Amortizable intangible assets, accumulated amortization | (361) | (213)
Intangible assets, net | $ 333 | $ 471
Other Intangible Assets [Member] | Weighted Average [Member] |  |
Weighted average life (Year) | 2 years 3 months 18 days |

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