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Note 4 - Allowance for Credit Losses - Impaired Loans and Related Allowances (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Impaired loans, unpaid principal balance	$ 4,202
Impaired loans, recorded investment with no allowance	1,588
Impaired loans, recorded investment with allowance	1,085
Impaired loans, total recorded investment	2,673
Impaired loans, related allowance	888
Impaired loans, average recorded investment	1,282
Impaired loans, interest income recognized	126
Real Estate 1 [Member] | Construction and Land Development [Member]
Impaired loans, unpaid principal balance	2,412
Impaired loans, recorded investment with no allowance	1,045
Impaired loans, recorded investment with allowance	0
Impaired loans, total recorded investment	1,045
Impaired loans, related allowance	0
Impaired loans, average recorded investment	30
Impaired loans, interest income recognized	75
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Impaired loans, unpaid principal balance	680
Impaired loans, recorded investment with no allowance	530
Impaired loans, recorded investment with allowance	0
Impaired loans, total recorded investment	530
Impaired loans, related allowance	0
Impaired loans, average recorded investment	580
Impaired loans, interest income recognized	11
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Impaired loans, unpaid principal balance	26
Impaired loans, recorded investment with no allowance	13
Impaired loans, recorded investment with allowance	0
Impaired loans, total recorded investment	13
Impaired loans, related allowance	0
Impaired loans, average recorded investment	22
Impaired loans, interest income recognized	0
Commercial and Industrial Loans [Member]
Impaired loans, unpaid principal balance	1,084
Impaired loans, recorded investment with no allowance	0
Impaired loans, recorded investment with allowance	1,085
Impaired loans, total recorded investment	1,085
Impaired loans, related allowance	888
Impaired loans, average recorded investment	650
Impaired loans, interest income recognized	$ 40

X

- Definition

Average 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 15
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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X

- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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

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+ References

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-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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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

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+ References

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-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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-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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+ References

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-Paragraph 14A
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