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Note 9 - Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Jul. 31, 2023 | Jan. 31, 2023
--- | --- | ---
Amortizable intangible assets, gross carrying amount | $ 18,840 |  | $ 18,831
Amortizable intangible assets, accumulated amortization | (13,662) |  | (13,140)
Intangible assets, net | 4,418 | [1] | 4,931
Amortizable intangible assets, impairment | (760) |  | (760)
Proprietary Rights [Member] |  |  |
Amortizable intangible assets, gross carrying amount | 8,238 |  | 8,238
Amortizable intangible assets, accumulated amortization | (4,835) |  | (4,606)
Intangible assets, net | $ 3,403 |  | 3,632
Proprietary Rights [Member] | Weighted Average [Member] |  |  |
Weighted average life (Year) | 4 years 8 months 12 days |  |
Customer Relationships [Member] |  |  |
Amortizable intangible assets, gross carrying amount | $ 5,024 |  | 5,024
Amortizable intangible assets, accumulated amortization | (4,943) |  | (4,894)
Intangible assets, net | $ 81 |  | 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 | (2,123) |  | (2,027)
Intangible assets, net | $ 417 |  | 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 | $ 894 |  | 894
Amortizable intangible assets, accumulated amortization | (102) |  | (97)
Intangible assets, net | 32 |  | 37
Amortizable intangible assets, impairment | $ (760) |  | (760)
Trade Names [Member] | Weighted Average [Member] |  |  |
Weighted average life (Year) | 2 years 9 months 18 days |  |
Developed Technology Rights [Member] |  |  |
Amortizable intangible assets, gross carrying amount | $ 1,430 |  | 1,430
Amortizable intangible assets, accumulated amortization | (1,084) |  | (1,013)
Intangible assets, net | $ 346 |  | 417
Developed Technology Rights [Member] | Weighted Average [Member] |  |  |
Weighted average life (Year) | 2 years 4 months 24 days |  |
Other Intangible Assets [Member] |  |  |
Amortizable intangible assets, gross carrying amount | $ 714 |  | 705
Amortizable intangible assets, accumulated amortization | (575) |  | (503)
Intangible assets, net | $ 139 |  | $ 202
Other Intangible Assets [Member] | Weighted Average [Member] |  |  |
Weighted average life (Year) | 10 months 24 days |  |
[1] | Reflects the condensed consolidated balance sheet as of July 31, 2023 and condensed consolidated statement of operations for the three and six months ended July 31, 2023 in the Form 10-Q.

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