Note 3 - Securities - Amortized Cost and Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt securities available-for-sale, amortized cost	$ 225,134	$ 121,654
Debt securities available-for-sale, gross unrealized gains	1,685	54
Debt securities available-for-sale, gross unrealized losses	(3,186)	(5,655)
Debt securities available-for-sale, at fair value	223,633	116,053
US Treasury Securities [Member]
Debt securities available-for-sale, amortized cost	2,956	2,194
Debt securities available-for-sale, gross unrealized gains	32	9
Debt securities available-for-sale, gross unrealized losses	0	(1)
Debt securities available-for-sale, at fair value	2,988	2,202
US Government Agencies Debt Securities [Member]
Debt securities available-for-sale, amortized cost	49,596	25,865
Debt securities available-for-sale, gross unrealized gains	104	11
Debt securities available-for-sale, gross unrealized losses	(143)	(427)
Debt securities available-for-sale, at fair value	49,557	25,449
Taxable Municipal Notes [Member]
Debt securities available-for-sale, amortized cost	34,124	6,142
Debt securities available-for-sale, gross unrealized gains	371	0
Debt securities available-for-sale, gross unrealized losses	(330)	(511)
Debt securities available-for-sale, at fair value	34,165	5,631
Nontaxable Municipal Notes [Member]
Debt securities available-for-sale, amortized cost	88,881	55,696
Debt securities available-for-sale, gross unrealized gains	870	3
Debt securities available-for-sale, gross unrealized losses	(2,316)	(3,903)
Debt securities available-for-sale, at fair value	87,435	51,796
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt securities available-for-sale, amortized cost	45,491	27,723
Debt securities available-for-sale, gross unrealized gains	292	31
Debt securities available-for-sale, gross unrealized losses	(315)	(656)
Debt securities available-for-sale, at fair value	45,468	27,098
Corporate Debt Securities [Member]
Debt securities available-for-sale, amortized cost	4,086	4,034
Debt securities available-for-sale, gross unrealized gains	16	0
Debt securities available-for-sale, gross unrealized losses	(82)	(157)
Debt securities available-for-sale, at fair value	$ 4,020	$ 3,877

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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Amortized cost excluding accrued interest, before allowance for credit loss, of 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 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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Amount excluding accrued interest, of 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/2009/role/commonPracticeRef
-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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