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Note 2 - Debt Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Securities available for sale, amortized cost	$ 142,206	$ 184,687
Securities available for sale, unrealized gains	240	12
Securities available for sale, unrealized losses	(11,132)	(14,850)
Securities available for sale, fair value	131,314	169,849	[1]
US Treasury Securities [Member]
Securities available for sale, amortized cost	10,915	55,760
Securities available for sale, unrealized gains	5	10
Securities available for sale, unrealized losses	0	(1)
Securities available for sale, fair value	10,920	55,769
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, amortized cost	10,352	13,949
Securities available for sale, unrealized gains	2	2
Securities available for sale, unrealized losses	(25)	(114)
Securities available for sale, fair value	10,329	13,837
Corporate Debt Securities [Member]
Securities available for sale, amortized cost	24,877	28,598
Securities available for sale, unrealized gains	0	0
Securities available for sale, unrealized losses	(454)	(1,056)
Securities available for sale, fair value	24,423	27,542
Mortgage-backed Agency Securities [Member]
Securities available for sale, amortized cost	96,062	86,380
Securities available for sale, unrealized gains	233	0
Securities available for sale, unrealized losses	(10,653)	(13,679)
Securities available for sale, fair value	$ 85,642	$ 72,701
[1] Derived from audited financial statements

X

- Definition

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).

+ References

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

+ Details

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X

- Definition

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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X

- Definition

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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X

- Definition

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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