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Note 8 - Loans and Related Allowance for Loan and Lease Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Recorded investment, with no related allowance	$ 2,550	$ 2,744
Unpaid principal balance, with no related allowance	2,867	3,221
Recorded investment, with related allowance	5,254	5,225
Unpaid principal balance, with related allowance	5,807	5,765
Related allowance	717	740
Recorded investment	7,804	7,969
Unpaid principal balance	8,674	8,986
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Recorded investment, with no related allowance	1,374	1,547
Unpaid principal balance, with no related allowance	1,546	1,802
Recorded investment, with related allowance	3,839	3,750
Unpaid principal balance, with related allowance	4,377	4,277
Related allowance	623	655
Recorded investment	5,213	5,297
Unpaid principal balance	5,923	6,079
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member]
Recorded investment, with no related allowance		731
Unpaid principal balance, with no related allowance		731
Recorded investment, with related allowance	716	731
Unpaid principal balance, with related allowance	716	731
Related allowance	10	10
Recorded investment	716
Unpaid principal balance	716
Residential Portfolio Segment [Member]
Recorded investment, with no related allowance	713	820
Unpaid principal balance, with no related allowance	771	874
Recorded investment, with related allowance	283	284
Unpaid principal balance, with related allowance	283	284
Related allowance	14	17
Recorded investment	996	1,104
Unpaid principal balance	1,054	1,158
Commercial And Industrial [Member]
Recorded investment, with no related allowance	421	370
Unpaid principal balance, with no related allowance	508	538
Recorded investment, with related allowance	209	217
Unpaid principal balance, with related allowance	224	230
Related allowance	56	42
Recorded investment	630	587
Unpaid principal balance	732	768
Home Equity Lines of Credit [Member]
Recorded investment, with no related allowance	42	7
Unpaid principal balance, with no related allowance	42	7
Recorded investment, with related allowance	207	243
Unpaid principal balance, with related allowance	207	243
Related allowance	14	16
Recorded investment	249	250
Unpaid principal balance	$ 249	$ 250

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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