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Note 4 - Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Beginning balance	$ 5,710	$ 7,485	$ 7,485
Charge-offs	(393)	(1,262)	(1,447)
Recoveries	375	211	322
Provision for (recovery of) loan losses	600	(1,000)	(650)
Ending balance	6,292	5,434	5,710
Individually evaluated for impairment, allowance	0	84	55
Collectively evaluated for impairment, allowance	6,292	5,350	5,655
Loans	906,514	822,411	825,118
Individually evaluated for impairment, loans	566	2,158	2,304
Collectively evaluated for impairment, loans	905,948	820,253	822,814
Real Estate 1 [Member] | Construction and Land Development [Member]
Beginning balance	345	306	306
Charge-offs	0	0	0
Recoveries	10	0	6
Provision for (recovery of) loan losses	99	(25)	33
Ending balance	454	281	345
Individually evaluated for impairment, allowance	0	0	0
Collectively evaluated for impairment, allowance	454	281	345
Loans	51,352	45,120	55,721
Individually evaluated for impairment, loans	0	0	0
Collectively evaluated for impairment, loans	51,352	45,120	55,721
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Beginning balance	1,077	1,022	1,022
Charge-offs	(6)	(15)	(15)
Recoveries	15	46	65
Provision for (recovery of) loan losses	(22)	(97)	5
Ending balance	1,064	956	1,077
Individually evaluated for impairment, allowance	0	0	0
Collectively evaluated for impairment, allowance	1,064	956	1,077
Loans	317,414	294,216	291,990
Individually evaluated for impairment, loans	549	470	765
Collectively evaluated for impairment, loans	316,865	293,746	291,225
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Beginning balance	3,230	4,956	4,956
Charge-offs	0	(992)	(992)
Recoveries	12	2	3
Provision for (recovery of) loan losses	331	(813)	(737)
Ending balance	3,573	3,153	3,230
Individually evaluated for impairment, allowance	0	0	0
Collectively evaluated for impairment, allowance	3,573	3,153	3,230
Loans	417,504	362,643	364,921
Individually evaluated for impairment, loans	17	153	30
Collectively evaluated for impairment, loans	417,487	362,490	364,891
Commercial and Industrial Loans [Member]
Beginning balance	718	784	784
Charge-offs	0	0	(6)
Recoveries	144	6	7
Provision for (recovery of) loan losses	69	(81)	(67)
Ending balance	931	709	718
Individually evaluated for impairment, allowance	0	84	55
Collectively evaluated for impairment, allowance	931	625	663
Loans	112,145	105,664	99,805
Individually evaluated for impairment, loans	0	1,535	1,509
Collectively evaluated for impairment, loans	112,145	104,129	98,296
Consumer and Other Loans [Member]
Beginning balance	340	417	417
Charge-offs	(387)	(255)	(434)
Recoveries	194	157	241
Provision for (recovery of) loan losses	123	16	116
Ending balance	270	335	340
Individually evaluated for impairment, allowance	0	0	0
Collectively evaluated for impairment, allowance	270	335	340
Loans	8,099	14,768	12,681
Individually evaluated for impairment, loans	0	0	0
Collectively evaluated for impairment, loans	$ 8,099	$ 14,768	$ 12,681

X

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

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-Topic 310
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-Section 50
-Paragraph 11B
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X

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

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X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
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-Paragraph 2
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X

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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