Note 10 - Stock-based Compensation - Summary of Stock-based Compensation 2 (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Stock-based compensation expense | $ 2,160 | $ 3,339 | $ 4,915 | $ 7,359 |
| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue | ||||
| Stock-based compensation expense | 77 | 47 | 136 | 158 |
| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||||
| Stock-based compensation expense | 1,473 | 1,913 | 3,432 | 4,039 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Stock-based compensation expense | 78 | 877 | 309 | 1,886 |
| Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense | ||||
| Stock-based compensation expense | $ 532 | $ 502 | $ 1,038 | $ 1,276 |