Note 2 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Amortized cost	$ 309,257	$ 319,939
Securities available-for-sale, gross unrealized gains	302	201
Securities available-for-sale, gross unrealized losses	(24,536)	(27,550)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	285,023	292,590
US Government Agencies Debt Securities [Member]
Amortized cost	4,587	5,298
Securities available-for-sale, gross unrealized gains	77	85
Securities available-for-sale, gross unrealized losses	(115)	(188)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	4,549	5,195
US Treasury and Government [Member]
Amortized cost	48,632	52,592
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(4,210)	(5,679)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	44,422	46,913
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	128,187	131,109
Securities available-for-sale, gross unrealized gains	1	1
Securities available-for-sale, gross unrealized losses	(13,366)	(13,233)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	114,822	117,877
Corporate Debt Securities [Member]
Amortized cost	3,250	4,249
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(102)	(87)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	3,148	4,162
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	28,785	29,867
Securities available-for-sale, gross unrealized gains	120	21
Securities available-for-sale, gross unrealized losses	(1,199)	(1,653)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	27,706	28,235
Collateralized Mortgage Obligations [Member]
Amortized cost	88,693	89,313
Securities available-for-sale, gross unrealized gains	53	11
Securities available-for-sale, gross unrealized losses	(5,544)	(6,701)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	83,202	82,623
Asset-Backed Securities [Member]
Amortized cost	7,123	7,511
Securities available-for-sale, gross unrealized gains	51	83
Securities available-for-sale, gross unrealized losses	0	(9)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $309,257 at June 30, 2025 and $319,939 at December 31, 2024)	$ 7,174	$ 7,585

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount, before tax, of unrealized loss 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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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