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Note 2 - Debt Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Securities available for sale, due within one year, amortized cost | $ 19,591 |  |
Securities available for sale, due within one year, fair value | 19,546 |  |
Securities available for sale, due after one year but within five years, amortized cost | 26,553 |  |
Securities available for sale, due after one year but within five years, fair value | 26,126 |  |
Securities available for sale, single maturity date, amortized cost | 46,144 |  |
Securities available for sale, single maturity date, fair value | 45,672 |  |
Total debt securities available-for-sale, amortized cost | 142,206 | $ 184,687 |
Total debt securities available-for-sale, fair value | 131,314 | $ 169,849 | [1]
Collateralized Mortgage-Backed Securities [Member] |  |  |
Agency mortgage-backed securities, amortized cost | 96,062 |  |
Agency mortgage-backed securities, fair value | $ 85,642 |  |
[1] | Derived from audited financial statements

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