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Note 13 - Shareholders' Equity - Stock Option Plan Cost (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Fair value of options vested | $ 361,000 | $ 199,000 |
Intrinsic value of options exercised | 1,087,000 | 700,000 |
Cash received from option exercises | 1,105,000 | 508,000 | $ 339,000
Tax benefit from option exercises | 93,000 | 83,000 |
Compensation cost | 343,000 | 393,000 |
Tax benefit associated with compensation cost | $ 23,000 | $ 51,000 |

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