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Note 3 - Securities - Summary of Amortized Costs and Fair Values of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Sep. 01, 2022
Debt Securities, Available-for-Sale, Amortized Cost	$ 185,917	$ 173,458	$ 82,200
Gross unrealized gains, available for sale securities	62	61
Gross unrealized losses, available for sale securities	(22,132)	(20,662)
Debt Securities, Available-for-Sale	163,847	152,857	$ 74,400
Securities available for sale, AFS	0	0
Amortized cost, held to maturity	109,836	148,351
Gross unrealized gains, held to maturity securities	8	107
Gross unrealized losses, held to maturity securities	(10,969)	(10,844)
Fair value, held to maturity securities	98,875	137,614
Securities available for sale, HTM	(95)	(107)
Amortized cost	295,753	321,809
Gross unrealized gains	70	168
Gross unrealized losses	(33,101)	(31,506)
Total securities, fair value	262,722	290,471
Total securities, allowance for credit loss	(95)	(107)
US Treasury Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	12,483	12,476
Gross unrealized gains, available for sale securities	0	0
Gross unrealized losses, available for sale securities	(795)	(1,026)
Debt Securities, Available-for-Sale	11,688	11,450
Securities available for sale, AFS	0	0
Amortized cost, held to maturity	9,632	39,085
Gross unrealized gains, held to maturity securities	0	0
Gross unrealized losses, held to maturity securities	(125)	(389)
Fair value, held to maturity securities	9,507	38,696
Securities available for sale, HTM	0	0
US Agency and Mortgage-backed Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	110,480	96,937
Gross unrealized gains, available for sale securities	57	55
Gross unrealized losses, available for sale securities	(12,498)	(12,192)
Debt Securities, Available-for-Sale	98,039	84,800
Securities available for sale, AFS	0	0
Amortized cost, held to maturity	86,555	94,617
Gross unrealized gains, held to maturity securities	0	0
Gross unrealized losses, held to maturity securities	(9,282)	(8,992)
Fair value, held to maturity securities	77,273	85,625
Securities available for sale, HTM	0	0
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost	62,954	64,045
Gross unrealized gains, available for sale securities	5	6
Gross unrealized losses, available for sale securities	(8,839)	(7,444)
Debt Securities, Available-for-Sale	54,120	56,607
Securities available for sale, AFS	0	0
Amortized cost, held to maturity	10,649	11,649
Gross unrealized gains, held to maturity securities	8	107
Gross unrealized losses, held to maturity securities	(1,112)	(943)
Fair value, held to maturity securities	9,545	10,813
Securities available for sale, HTM	0	0
Corporate Debt Securities [Member]
Amortized cost, held to maturity	3,000	3,000
Gross unrealized gains, held to maturity securities	0	0
Gross unrealized losses, held to maturity securities	(450)	(520)
Fair value, held to maturity securities	2,550	2,480
Securities available for sale, HTM	$ (95)	$ (107)

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