Note 4 - Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Amortized cost, due in one year or less, available for sale securities	$ 28,966
Fair value, due in one year or less, available for sale securities	28,715
Amortized cost, due after one year through five years, available for sale securities	220,924
Fair value, due after one year through five years, available for sale securities	208,049
Amortized cost, due after five years through ten years, available for sale securities	233,126
Fair value, due after five years through ten years, available for sale securities	199,321
Amortized cost, due after ten years, available for sale securities	182,228
Fair value, due after ten years, available for sale securities	160,168
Amortized cost, total securities available for sale	665,244	$ 680,496
Fair value, total securities available for sale	$ 596,253	$ 601,898

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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