Note 9 - Stock-based Compensation - Schedule of Stock Based Compensation 2 (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| stock compensation expense | $ 171 | $ 1,096 | $ 757 | $ 2,183 |
| Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||||
| stock compensation expense | 81 | 629 | 354 | 1,267 |
| Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| stock compensation expense | 34 | 204 | 115 | 418 |
| Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:SellingAndMarketingExpense | ||||
| stock compensation expense | $ 56 | $ 263 | $ 288 | $ 498 |