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Note 3 - Investment Securities - Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Jul. 31, 2024
Debt Securities, Available-for-Sale, Amortized Cost	$ 417,251	$ 418,935
Securities available for sale, gross unrealized gains	1,022	374
Securities available for sale, gross unrealized losses	26,555	30,066
Securities available for sale, at fair value	391,718	389,243
Securities held to maturity, amortized cost	7,000	7,000	$ 2,000
Securities held to maturity, gross unrealized gains	0	0
Securities held to maturity, gross unrealized losses	2,409	2,409
Debt Securities, Held-to-Maturity, Fair Value	4,591	4,591
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt Securities, Available-for-Sale, Amortized Cost	78,033	76,295
Securities available for sale, gross unrealized gains	106	0
Securities available for sale, gross unrealized losses	6,938	8,354
Securities available for sale, at fair value	71,201	67,941
Agency Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-Sale, Amortized Cost	64,236	47,821
Securities available for sale, gross unrealized gains	502	197
Securities available for sale, gross unrealized losses	222	500
Securities available for sale, at fair value	64,516	47,518
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	111,629	122,834
Securities available for sale, gross unrealized gains	18	6
Securities available for sale, gross unrealized losses	3,632	4,760
Securities available for sale, at fair value	108,015	118,080
US Treasury and Government [Member]
Debt Securities, Available-for-Sale, Amortized Cost	16,828	21,803
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	135	254
Securities available for sale, at fair value	16,693	21,549
Municipal Notes [Member]
Debt Securities, Available-for-Sale, Amortized Cost	146,525	150,182
Securities available for sale, gross unrealized gains	396	171
Securities available for sale, gross unrealized losses	15,628	16,198
Securities available for sale, at fair value	131,293	134,155
Corporate Note Securities [Member]
Securities held to maturity, amortized cost	7,000	7,000
Securities held to maturity, gross unrealized gains	0	0
Securities held to maturity, gross unrealized losses	2,409	2,409
Debt Securities, Held-to-Maturity, Fair Value	$ 4,591	$ 4,591

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