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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	Jun. 30, 2025	Dec. 31, 2024
Due within one year, amortized cost	$ 5,555
Due within one year, fair value	5,545
Due after one year through five years, amortized cost	14,252
Due after one year through five years, fair value	13,148
Due after five years through ten years, amortized cost	18,964
Due after five years through ten years, fair value	18,420
Due after ten years, amortized cost	23,640
Due after ten years, fair value	23,214
Amortized cost	238,362	$ 232,630
Fair value	218,757	208,549
Mortgage-related Securities [Member]
Without single date securities	175,951
Without single date securities, fair value	158,430
Amortized cost	175,951	169,607
Fair value	$ 158,430	$ 147,747

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