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Note 6 - Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2026
Notes Tables |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Restricted Stock |
|  | March 31, |  |  | March 31, |
|  | 2026 |  |  | 2025 |
Restricted stock awards outstanding, beginning of year |  |  | 12,011,881 |  |  |  | 11,843,586 |
Changes during the year: |  |  |  |  |  |  |  |
Granted |  |  | 1,047,977 |  |  |  | 2,547,179 |
Vested |  |  | (1,636,138 | ) |  |  | (1,431,666 | )
Expired or Forfeited |  |  | (63,148 | ) |  |  | (20,052 | )
Restricted stock awards outstanding, end of period |  |  | 11,360,572 |  |  |  | 12,939,047 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |
|  | March 31, |  |  | March 31, |
|  | 2026 |  |  | 2025 |
Stock options outstanding, beginning of year |  |  | 4,204,816 |  |  |  | 4,470,216 |
Changes during the year: |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |
Exercised |  |  | (131,000 | ) |  |  | (5,000 | )
Expired or Forfeited |  |  | — |  |  |  | — |
Stock options outstanding, end of period |  |  | 4,073,816 |  |  |  | 4,465,216 |

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