Note 15 - Segment Information - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands  | 
Apr. 30, 2023  | 
Jan. 31, 2023  | 
|---|---|---|
| Long-Lived Assets | $ 6,920 | $ 10,150 | 
| UNITED STATES | ||
| Long-Lived Assets | 4,145 | 7,117 | 
| Non-US [Member] | ||
| Long-Lived Assets | $ 2,775 | $ 3,033 | 
| X | ||||||||||
- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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