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Note 2 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Due within one year, amortized cost, available for sale securities	$ 11,519
Due within one year, fair value, available for sale securities	11,513
Due within one year, Amortized cost, held to maturity securities	14,981
Due within one year, fair value, held to maturity securities	14,867
Due after one year through five years, amortized cost, available for sale securities	65,594
Due after one year through five years, fair value, available for sale securities	64,464
Due after one year through five years, Amortized cost, held to maturity securities	13,485
Due after one year through five years, fair value, held to maturity securities	12,862
Due after five years through ten years, amortized cost, available for sale securities	39,643
Due after five years through ten years, fair value, available for sale securities	37,338
Due after five years through ten years, Amortized cost, held to maturity securities	17,249
Due after five years through ten years, fair value, held to maturity securities	16,225
Due after ten years, amortized cost, available for sale securities	95,162
Due after ten years, fair value, available for sale securities	83,161
Due after ten years, Amortized cost, held to maturity securities	58,976
Due after ten years, fair value, held to maturity securities	53,421
Amortized cost, available for sale securities	211,918	$ 185,917
Fair value, available for sale securities	196,476	163,847
Amortized cost, held to maturity securities	104,691	109,836
Fair value, held to maturity securities	$ 97,375	$ 98,875

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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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