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Note 4 - Allowance for Loan Losses - Impaired Loans and Related Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Impaired loans, unpaid principal balance	$ 4,202	$ 2,602
Impaired loans, recorded investment with no allowance	1,588	795
Impaired loans, recorded investment with allowance	1,085	1,509
Impaired loans, total recorded investment	2,673	2,304
Impaired loans, related allowance	888	55
Impaired loans, average recorded investment	1,282	4,517
Impaired loans, interest income recognized	126	9
Real Estate 1 [Member] | Construction and Land Development [Member]
Impaired loans, unpaid principal balance	2,412	0
Impaired loans, recorded investment with no allowance	1,045	0
Impaired loans, recorded investment with allowance	0	0
Impaired loans, total recorded investment	1,045	0
Impaired loans, related allowance	0	0
Impaired loans, average recorded investment	30	91
Impaired loans, interest income recognized	75	0
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Impaired loans, unpaid principal balance	680	889
Impaired loans, recorded investment with no allowance	530	765
Impaired loans, recorded investment with allowance	0	0
Impaired loans, total recorded investment	530	765
Impaired loans, related allowance	0	0
Impaired loans, average recorded investment	580	429
Impaired loans, interest income recognized	11	9
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Impaired loans, unpaid principal balance	26	40
Impaired loans, recorded investment with no allowance	13	30
Impaired loans, recorded investment with allowance	0	0
Impaired loans, total recorded investment	13	30
Impaired loans, related allowance	0	0
Impaired loans, average recorded investment	22	2,384
Impaired loans, interest income recognized	0	0
Commercial and Industrial Loans [Member]
Impaired loans, unpaid principal balance	1,084	1,673
Impaired loans, recorded investment with no allowance	0	0
Impaired loans, recorded investment with allowance	1,085	1,509
Impaired loans, total recorded investment	1,085	1,509
Impaired loans, related allowance	888	55
Impaired loans, average recorded investment	650	1,613
Impaired loans, interest income recognized	$ 40	$ 0

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(3)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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+ References

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-Publisher FASB
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-Section 50
-Paragraph 15
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