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Note 2 - Investment Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Available for sale securities, due in one year or less, amortized cost	$ 1,186
Available for sale securities, due in one year or less, fair value	1,184
Available for sale securities, due from one to five years, amortized cost	52,910
Available for sale securities, due from one to five years, fair value	49,717
Available for sale securities, due from five to ten years, amortized cost	68,858
Available for sale securities, due from five to ten years, fair value	61,270
Available for sale securities, due after ten years, amortized cost	63,872
Available for sale securities, due after ten years, fair value	60,040
Total available for sale securities debt maturities, amortized cost	186,826
Total available for sale securities, debt maturities, fair value	172,211
Amortized cost	295,079	$ 299,162
Securities available-for-sale, at fair value (amortized cost of $295,079 at March 31, 2026 and $299,162 at December 31, 2025)	274,887	281,692
Collateralized Mortgage-Backed Securities [Member]
Available for sale securities, without single maturity, amortized cost	26,684
Available for sale securities, without single maturity, fair value	25,777
Amortized cost	26,684	27,222
Securities available-for-sale, at fair value (amortized cost of $295,079 at March 31, 2026 and $299,162 at December 31, 2025)	25,777	26,494
Collateralized Mortgage Obligations [Member]
Available for sale securities, without single maturity, amortized cost	81,569
Available for sale securities, without single maturity, fair value	76,899
Amortized cost	81,569	83,907
Securities available-for-sale, at fair value (amortized cost of $295,079 at March 31, 2026 and $299,162 at December 31, 2025)	$ 76,899	$ 79,661

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