Note 9 - Stock-based Compensation - Summary of Compensation Costs Related to Stock-Based Compensation Awards (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Allocated share based compensation expense | $ 762 | $ 633 | $ 1,797 | $ 1,279 |