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Note 10 - Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Common Stock Outstanding Roll Forward [Table Text Block] |
|  | Nine Months Ended September 30, 2025 |  | Year Ended December 31, 2024
|  | Common Stock Issued |  | Held in Treasury |  | Common Stock Outstanding |  | Common Stock Issued |  | Held in Treasury |  | Common Stock Outstanding
Shares, beginning of year |  |  | 5,454,639 |  |  |  | (81,584 | ) |  |  | 5,373,055 |  |  |  | 5,454,639 |  |  |  | (81,584 | ) |  |  | 5,373,055 |
Stock-based compensation |  |  | 16,156 |  |  |  | — |  |  |  | 16,156 |  |  |  | — |  |  |  | — |  |  |  | — |
Shares issued from settlement of Warrants |  |  | 68,996 |  |  |  | — |  |  |  | 68,996 |  |  |  | — |  |  |  | — |  |  |  | — |
Repurchases of common stock |  |  | — |  |  |  | (51,463 | ) |  |  | (51,463 | ) |  |  | — |  |  |  | — |  |  |  | — |
Shares, end of period |  |  | 5,539,791 |  |  |  | (133,047 | ) |  |  | 5,406,744 |  |  |  | 5,454,639 |  |  |  | (81,584 | ) |  |  | 5,373,055 |

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