Note 13 - Benefit Plan (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0 | $ 0 | $ 0 |
| Defined Contribution Plan, Cost | $ 100 | $ 200 | $ 300 | $ 500 |