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Note 8 - Loans and Related Allowance for Credit Losses - Impaired Loans by Class (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Recorded investment, with no related allowance	$ 6,451
Unpaid principal balance, with no related allowance	6,612
Recorded investment, with related allowance	15,864
Unpaid principal balance, with related allowance	15,864
Related allowance	689
Recorded investment	22,315
Unpaid principal balance	22,476
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member]
Recorded investment, with no related allowance	4,141
Unpaid principal balance, with no related allowance	4,141
Recorded investment, with related allowance	1,509
Unpaid principal balance, with related allowance	1,509
Related allowance	407
Recorded investment	5,650
Unpaid principal balance	5,650
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Recorded investment, with no related allowance	1,042
Unpaid principal balance, with no related allowance	1,042
Recorded investment, with related allowance	12,528
Unpaid principal balance, with related allowance	12,528
Related allowance	167
Recorded investment	13,570
Unpaid principal balance	13,570
Residential Portfolio Segment [Member]
Recorded investment, with no related allowance	706
Unpaid principal balance, with no related allowance	770
Recorded investment, with related allowance	317
Unpaid principal balance, with related allowance	317
Related allowance	28
Recorded investment	1,023
Unpaid principal balance	1,087
Commercial And Industrial [Member]
Recorded investment, with no related allowance	450
Unpaid principal balance, with no related allowance	547
Recorded investment, with related allowance	1,378
Unpaid principal balance, with related allowance	1,378
Related allowance	39
Recorded investment	1,828
Unpaid principal balance	1,925
Home Equity Lines of Credit [Member]
Recorded investment, with no related allowance	112
Unpaid principal balance, with no related allowance	112
Recorded investment, with related allowance	132
Unpaid principal balance, with related allowance	132
Related allowance	48
Recorded investment	244
Unpaid principal balance	$ 244

X

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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X

- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

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X

- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

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X

- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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