Note 6 - Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands |
6 Months Ended | ||
|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jan. 31, 2026 |
|
| Weighted average remaining lease term, Operating leases (Year) | 1 year 10 days | 2 years 7 months 20 days | |
| Weighted average discount rate, Operating leases | 15.00% | 15.00% | |
| Operating cash flows from operating leases | $ (469) | $ (464) | |
| Right-of-use assets obtained in exchange for lease liabilities, Operating leases | $ 116 | $ 112 | |
| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|