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Note 4 - Allowance for Loan Losses - Impaired Loans and Related Allowances (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Impaired loans, unpaid principal balance	$ 589	$ 2,433	$ 2,602
Impaired loans, recorded investment with no allowance	566	623	795
Impaired loans, recorded investment with allowance	0	1,535	1,509
Impaired loans, total recorded investment	566	2,158	2,304
Impaired loans, related allowance	0	84	55
Impaired loans, average recorded investment	1,440	5,400	4,517
Impaired loans, interest income recognized	11	4	9
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Impaired loans, unpaid principal balance	560	611	889
Impaired loans, recorded investment with no allowance	549	470	766
Impaired loans, recorded investment with allowance	0	0	0
Impaired loans, total recorded investment	549	470	766
Impaired loans, related allowance	0	0	0
Impaired loans, average recorded investment	593	420	429
Impaired loans, interest income recognized	11	3	9
Real Estate 1 [Member] | Construction and Land Development [Member]
Impaired loans, unpaid principal balance		0	0
Impaired loans, recorded investment with no allowance		0	0
Impaired loans, recorded investment with allowance		0	0
Impaired loans, total recorded investment		0	0
Impaired loans, related allowance		0	0
Impaired loans, average recorded investment		273	91
Impaired loans, interest income recognized		0	0
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Impaired loans, unpaid principal balance	29	167	40
Impaired loans, recorded investment with no allowance	17	153	29
Impaired loans, recorded investment with allowance	0	0	0
Impaired loans, total recorded investment	17	153	29
Impaired loans, related allowance	0	0	0
Impaired loans, average recorded investment	24	3,159	2,384
Impaired loans, interest income recognized	0	1	0
Commercial and Industrial Loans [Member]
Impaired loans, unpaid principal balance	0	1,655	1,673
Impaired loans, recorded investment with no allowance	0	0	0
Impaired loans, recorded investment with allowance	0	1,535	1,509
Impaired loans, total recorded investment	0	1,535	1,509
Impaired loans, related allowance	0	84	55
Impaired loans, average recorded investment	823	1,548	1,613
Impaired loans, interest income recognized	$ 0	$ 0	$ 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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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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
-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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- Definition

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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)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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+ References

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-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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+ References

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-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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+ References

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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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