Note 2 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Amortized cost	$ 300,991	$ 299,162
Securities available-for-sale, gross unrealized gains	287	404
Securities available-for-sale, gross unrealized losses	(28,454)	(17,874)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	272,824	281,692
US Government Agencies Debt Securities [Member]
Amortized cost	3,793	4,179
Securities available-for-sale, gross unrealized gains	41	62
Securities available-for-sale, gross unrealized losses	(172)	(86)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	3,662	4,155
US Treasury and Government [Member]
Amortized cost	47,695	47,665
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	(4,223)	(3,357)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	43,472	44,308
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	134,605	127,469
Securities available-for-sale, gross unrealized gains	0	53
Securities available-for-sale, gross unrealized losses	(16,966)	(9,198)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	117,639	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	(17)	(29)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	983	1,971
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	25,287	27,222
Securities available-for-sale, gross unrealized gains	137	180
Securities available-for-sale, gross unrealized losses	(1,485)	(908)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	23,939	26,494
Collateralized Mortgage Obligations [Member]
Amortized cost	82,546	83,907
Securities available-for-sale, gross unrealized gains	35	49
Securities available-for-sale, gross unrealized losses	(5,591)	(4,295)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	76,990	79,661
Asset-Backed Securities [Member]
Amortized cost	6,065	6,720
Securities available-for-sale, gross unrealized gains	74	60
Securities available-for-sale, gross unrealized losses	0	(1)
Securities available-for-sale, ACL	0	0
Securities available-for-sale, at fair value (amortized cost of $300,991 at September 30, 2026 and $299,162 at December 31, 2025)	$ 6,139	$ 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
-SubTopic 210
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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
-Topic 942
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-Name Accounting Standards Codification
-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
-Topic 942
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