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Note 2 - Debt Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Securities available for sale, due within one year, amortized cost	$ 18,402
Securities available for sale, due within one year, fair value	18,381
Securities available for sale, due after one year but within five years, amortized cost	33,671
Securities available for sale, due after one year but within five years, fair value	32,834
Securities available for sale, due after five years but within ten years, amortized cost	0
Securities available for sale, due after five years but within ten years, fair value	0
Securities available for sale, single maturity date, amortized cost	52,073
Securities available for sale, single maturity date, fair value	51,215
Total debt securities available-for-sale	142,389	$ 184,687
Total debt securities available-for-sale	129,659	$ 169,849	[1]
Collateralized Mortgage-Backed Securities [Member]
Agency mortgage-backed securities, amortized cost	90,316
Agency mortgage-backed securities, fair value	$ 78,444
[1] Derived from audited financial statements

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