Note 2 - Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jul. 31, 2023 |
Jul. 31, 2022 |
|
| Additions to (reductions from) provision for credit loss expense | $ 4 | $ 113 |
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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