Note 3 - Share-based Compensation (Details Textual) $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
|
Jun. 30, 2025
USD ($)
shares
|
Jun. 30, 2025
USD ($)
shares
|
|
| Restricted Stock Units (RSUs) [Member] | ||
| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ | $ 80.4 | $ 80.4 |
| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 2 years 8 months 12 days | |
| Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period | shares | 1,756 | 5,848 |
| Performance Shares [Member] | ||
| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ | $ 40.3 | $ 40.3 |
| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 2 years 3 months 18 days | |
| Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period | shares | 0 | 84,001 |