Note 6 - Stock-Based Compensation - Stock-Based Compensation Expense 2 (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Total stock-based compensation expense | $ 4,973 | $ 5,189 | $ 6,885 | $ 10,870 |
| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue | ||||
| Total stock-based compensation expense | 28 | 0 | 72 | 0 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Total stock-based compensation expense | 2,527 | 2,335 | 4,285 | 5,097 |
| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | ||||
| Total stock-based compensation expense | $ 2,418 | $ 2,854 | $ 2,528 | $ 5,773 |