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Note 6 - Stock Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2026
Notes Tables |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Restricted Stock |
|  | June 30, |  |  | June 30, |
|  | 2026 |  |  | 2025 |
Restricted stock awards outstanding, beginning of year |  |  | 12,011,881 |  |  |  | 11,843,586 |
Changes during the year: |  |  |  |  |  |  |  |
Granted |  |  | 1,047,977 |  |  |  | 2,723,646 |
Vested |  |  | (1,746,031 | ) |  |  | (1,604,013 | )
Expired or Forfeited |  |  | (92,903 | ) |  |  | (193,120 | )
Restricted stock awards outstanding, end of period |  |  | 11,220,924 |  |  |  | 12,770,099 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |
|  | June 30, |  |  | June 30, |
|  | 2026 |  |  | 2025 |
Stock options outstanding, beginning of year |  |  | 4,204,816 |  |  |  | 4,470,216 |
Changes during the year: |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |
Exercised |  |  | (144,660 | ) |  |  | (51,650 | )
Expired or Forfeited |  |  | — |  |  |  | (56,250 | )
Stock options outstanding, end of period |  |  | 4,060,156 |  |  |  | 4,362,316 |

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