Note 3 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Securities available-for-sale, amortized cost	$ 358,169	$ 385,275
Securities available-for-sale, gross unrealized gains	273	80
Securities available-for-sale, gross unrealized losses	(32,478)	(35,860)
Securities available-for-sale	325,964	349,495
US Government Agencies Debt Securities [Member]
Securities available-for-sale, amortized cost	7,416	2,575
Securities available-for-sale, gross unrealized gains	163	2
Securities available-for-sale, gross unrealized losses	(205)	(187)
Securities available-for-sale	7,374	2,390
US Treasury and Government [Member]
Securities available-for-sale, amortized cost	52,462	58,715
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(6,404)	(6,764)
Securities available-for-sale	46,058	51,951
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale, amortized cost	152,990	190,811
Securities available-for-sale, gross unrealized gains	67	77
Securities available-for-sale, gross unrealized losses	(13,865)	(18,039)
Securities available-for-sale	139,192	172,849
Corporate Debt Securities [Member]
Securities available-for-sale, amortized cost	4,242	7,240
Securities available-for-sale, gross unrealized gains	0	1
Securities available-for-sale, gross unrealized losses	(411)	(251)
Securities available-for-sale	3,831	6,990
Collateralized Mortgage-Backed Securities [Member]
Securities available-for-sale, amortized cost	30,739	31,553
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(1,952)	(1,900)
Securities available-for-sale	28,787	29,653
Collateralized Mortgage Obligations [Member]
Securities available-for-sale, amortized cost	97,648	90,812
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(9,536)	(8,681)
Securities available-for-sale	88,112	82,131
Asset-Backed Securities [Member]
Securities available-for-sale, amortized cost	12,672	3,569
Securities available-for-sale, gross unrealized gains	43	0
Securities available-for-sale, gross unrealized losses	(105)	(38)
Securities available-for-sale	$ 12,610	$ 3,531

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Topic 320
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