Note 2 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Amortized cost	$ 303,767	$ 299,162
Securities available-for-sale, gross unrealized gains	274	404
Securities available-for-sale, gross unrealized losses	(18,365)	(17,874)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	285,676	281,692
US Government Agencies Debt Securities [Member]
Amortized cost	3,904	4,179
Securities available-for-sale, gross unrealized gains	34	62
Securities available-for-sale, gross unrealized losses	(108)	(86)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	3,830	4,155
US Treasury and Government [Member]
Amortized cost	47,685	47,665
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(3,587)	(3,357)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	44,098	44,308
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	134,912	127,469
Securities available-for-sale, gross unrealized gains	5	53
Securities available-for-sale, gross unrealized losses	(9,252)	(9,198)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	125,665	118,324
Corporate Debt Securities [Member]
Amortized cost	1,000	2,000
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(3)	(29)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	997	1,971
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	26,056	27,222
Securities available-for-sale, gross unrealized gains	164	180
Securities available-for-sale, gross unrealized losses	(982)	(908)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	25,238	26,494
Collateralized Mortgage Obligations [Member]
Amortized cost	83,938	83,907
Securities available-for-sale, gross unrealized gains	35	49
Securities available-for-sale, gross unrealized losses	(4,424)	(4,295)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	79,549	79,661
Asset-Backed Securities [Member]
Amortized cost	6,272	6,720
Securities available-for-sale, gross unrealized gains	36	60
Securities available-for-sale, gross unrealized losses	(9)	(1)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $303,767 at June 30, 2026 and $299,162 at December 31, 2025)	$ 6,299	$ 6,779

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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+ 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/2003/role/disclosureRef
-Topic 942
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-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section S50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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