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Note 2 - Securities Available for Sale - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Due within one year, amortized cost	$ 2,284
Due within one year, fair value	2,287
Due after one year through five years, amortized cost	15,097
Due after one year through five years, fair value	14,072
Due after five years through ten years, amortized cost	18,805
Due after five years through ten years, fair value	18,647
Due after ten years, amortized cost	27,208
Due after ten years, fair value	27,379
Amortized cost	243,439	$ 232,630
Fair value	226,403	208,549
Mortgage-related Securities [Member]
Without single date securities	180,045
Without single date securities, fair value	164,018
Amortized cost	180,045	169,607
Fair value	$ 164,018	$ 147,747

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