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Note 9 - Incentive Plans (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Shares Available Under Long-term Incentive Plan [Table Text Block] |
|  | March 31, 2025 |  |  | December 31, 2024 |
Approved and authorized shares |  |  | 16,414,015 |  |  |  | 16,414,015 |
Shares subject to awards issued under plan |  |  | (15,807,337 | ) |  |  | (15,808,671 | )
Shares available for future grant |  |  | 606,678 |  |  |  | 605,344 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |  |  | Average Exercise Price |  |  | Remaining Term in Years |  |  | Intrinsic Value (in thousands) |
Outstanding at December 31, 2023 |  |  | 13,449,061 |  |  | $ | 11.95 |  |  |  | 6.3 |  |  | $ | 47,672 |
Forfeitures |  |  | (4,999 | ) |  | $ | 26,44 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2024 |  |  | 13,444,062 |  |  | $ | 11.95 |  |  |  | 5.3 |  |  | $ | 53,093 |
Forfeitures |  |  | (1,334 | ) |  | $ | 19.98 |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2025 |  |  | 13,442,728 |  |  | $ | 11.94 |  |  |  | 5.1 |  |  | $ | 29,544 |
Vested at December 31, 2024 |  |  | 13,444,062 |  |  | $ | 11.95 |  |  |  | 5.3 |  |  | $ | 53,093 |
Exercisable at December 31, 2024 |  |  | 11,495,062 |  |  | $ | 12.19 |  |  |  | 5.9 |  |  | $ | 44,907 |
Vested at March 31, 2025 |  |  | 13,442,728 |  |  | $ | 11.94 |  |  |  | 5.1 |  |  | $ | 29,544 |
Exercisable at March 31, 2025 |  |  | 11,493,728 |  |  | $ | 12.19 |  |  |  | 5.7 |  |  | $ | 25,334 |

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