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Note 7 - Stock-based Compensation - Stock Option Plan Cost (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Fair value of options vested | $ 191,000 | $ 192,000 | $ 384,000 | $ 199,000
Intrinsic value of options exercised | 260,000 | 25,000 | 874,000 | 561,000
Cash received from option exercises | 353,000 | 0 | 936,000 | 367,000
Tax benefit from option exercises | 24,000 | 5,000 | 43,000 | 74,000
Compensation cost | 93,000 | 131,000 | 256,000 | 350,000
Tax benefit associated with compensation cost | $ 5,000 | $ 13,000 | $ 14,000 | $ 33,000

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