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Note 3 - Loans - Summary of Loan Classes and an Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Loans	$ 952,499	$ 920,523	$ 906,514
Non-accrual loans	3,116	2,673
Accruing loans past due 90 days or more amounted	370	0
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,335	1,314
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	60	235
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	637	2,337
Financial Asset, Past Due [Member]
Loans	2,032	3,886
Financial Asset, Not Past Due [Member]
Loans	950,467	916,637
Real Estate 1 [Member] | Construction and Land Development [Member]
Loans	50,405	51,840	51,352
Non-accrual loans	39	1,045
Accruing loans past due 90 days or more amounted	0	0
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	0	115
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	20
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	39	1,045
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Past Due [Member]
Loans	39	1,180
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Not Past Due [Member]
Loans	50,366	50,660
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Loans	340,773	331,421	317,414
Non-accrual loans	546	530
Accruing loans past due 90 days or more amounted	368	0
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,242	1,033
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	58	60
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	534	207
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Past Due [Member]
Loans	1,834	1,300
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Not Past Due [Member]
Loans	338,939	330,121
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Loans	433,177	418,456	417,504
Non-accrual loans	67	13
Accruing loans past due 90 days or more amounted	0	0
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	0	109
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	0
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	62	0
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, Past Due [Member]
Loans	62	109
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	433,115	418,347
Commercial and Industrial Loans [Member]
Loans	117,130	111,225	112,145
Non-accrual loans	2,464	1,085
Accruing loans past due 90 days or more amounted	0	0
Commercial and Industrial Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	83	31
Commercial and Industrial Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	130
Commercial and Industrial Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	1,085
Commercial and Industrial Loans [Member] | Financial Asset, Past Due [Member]
Loans	83	1,246
Commercial and Industrial Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	117,047	109,979
Consumer and Other Loans [Member]
Loans	11,014	7,581	$ 8,099
Non-accrual loans	0	0
Accruing loans past due 90 days or more amounted	2	0
Consumer and Other Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	10	26
Consumer and Other Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	2	25
Consumer and Other Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	2	0
Consumer and Other Loans [Member] | Financial Asset, Past Due [Member]
Loans	14	51
Consumer and Other Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	$ 11,000	$ 7,530

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