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Note 4 - Loans - Troubled Debt Restructuring On Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Financing Receivable, Modified in Period, Amount	$ 0	$ 50
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage
Contractual Interest Rate Reduction [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0
Extended Maturity [Member]
Financing Receivable, Modified in Period, Amount	0	0
Principal Forgiveness [Member]
Financing Receivable, Modified in Period, Amount	0	0
Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	0	0
Extended Maturity and Payment Differential [Member]
Financing Receivable, Modified in Period, Amount	0	29
Interest Rate Reduction and Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	0	21
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 21
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.01%
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Extended Maturity [Member]
Financing Receivable, Modified in Period, Amount	0	0
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Principal Forgiveness [Member]
Financing Receivable, Modified in Period, Amount	0	0
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	0	0
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Extended Maturity and Payment Differential [Member]
Financing Receivable, Modified in Period, Amount	0	0
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member] | Interest Rate Reduction and Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	0	21
Consumer Portfolio Segment [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 29
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.13%
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0
Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modified in Period, Amount	0	0
Consumer Portfolio Segment [Member] | Principal Forgiveness [Member]
Financing Receivable, Modified in Period, Amount	0	0
Consumer Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	0	0
Consumer Portfolio Segment [Member] | Extended Maturity and Payment Differential [Member]
Financing Receivable, Modified in Period, Amount	0	29
Consumer Portfolio Segment [Member] | Interest Rate Reduction and Payment Deferral [Member]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0

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
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

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