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Note 8 - Loans - Amortized Cost of Modified Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Modified	$ 135	$ 2,653	$ 8,079	$ 2,688
Extended Maturity [Member]
Modified	0	1,489	6,749	1,489
Payment Deferral [Member]
Modified	135	0	356	0
Rate Reduction and Term Extension and Payment Deferral [Member]
Modified	0	1,164	974	1,199
Commercial Portfolio Segment [Member]
Modified	$ 135	$ 2,653	$ 7,858	$ 2,688
% of total loans	0.00%	0.09%	0.25%	0.09%
Weighted average rate reduction	0.00%	(0.94%)	1.04%	(1.27%)
Weighted average term increase (Year)	0 years	9 months 18 days	1 year 10 months 24 days	9 months 18 days
Weighted average payment deferral (Year)	7 months 6 days	4 months 24 days	1 month 6 days	4 months 20 days
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Modified	$ 0	$ 1,489	$ 6,749	$ 1,489
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Modified	135	0	135	0
Commercial Portfolio Segment [Member] | Rate Reduction and Term Extension and Payment Deferral [Member]
Modified	$ 0	$ 1,164	974	$ 1,199
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Modified			$ 221
% of total loans			0.00%
Weighted average rate reduction			(0.18%)
Weighted average term increase (Year)			0 years
Weighted average payment deferral (Year)			2 years
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Extended Maturity [Member]
Modified			$ 0
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Payment Deferral [Member]
Modified			221
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Rate Reduction and Term Extension and Payment Deferral [Member]
Modified			$ 0

X

- Definition

Period of payment deferral in weighted average of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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X

- Definition

Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
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-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Section 50
-Paragraph 42
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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X

- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

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-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

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- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

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