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Note 3 - Loans - Summary of Loan Classes and an Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Loans	$ 972,974	$ 969,430	$ 917,967
Non-accrual loans	8,015	6,763	1,591
Accruing loans past due 90 days or more amounted	175	524
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	2,131	1,832
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	840	670
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	175	709
Financial Asset, Past Due [Member]
Loans	3,146	3,211
Financial Asset, Not Past Due [Member]
Loans	969,828	966,219
Real Estate 1 [Member] | Construction and Land Development [Member]
Loans	53,364	52,680	48,610
Non-accrual loans	37	38	1,044
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	183
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	4
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	38
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Past Due [Member]
Loans	0	225
Real Estate 1 [Member] | Construction and Land Development [Member] | Financial Asset, Not Past Due [Member]
Loans	53,364	52,455
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Loans	347,014	344,369	334,302
Non-accrual loans	775	495	474
Accruing loans past due 90 days or more amounted	130	245
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,604	1,364
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	65	350
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	130	392
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Past Due [Member]
Loans	1,799	2,106
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset, Not Past Due [Member]
Loans	345,215	342,263
Real Estate 1 [Member] | Other Real Estate Loans [Member]
Loans	445,085	447,272	416,001
Non-accrual loans	0	0	73
Accruing loans past due 90 days or more amounted	0	82
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	0	0
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	0	82
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, Past Due [Member]
Loans	0	82
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	445,085	447,190
Commercial and Industrial Loans [Member]
Loans	113,562	113,074	110,937
Non-accrual loans	7,203	6,230	0
Accruing loans past due 90 days or more amounted	45	197
Commercial and Industrial Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	474	252
Commercial and Industrial Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	769	316
Commercial and Industrial Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	45	197
Commercial and Industrial Loans [Member] | Financial Asset, Past Due [Member]
Loans	1,288	765
Commercial and Industrial Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	112,274	112,309
Consumer and Other Loans [Member]
Loans	13,949	12,035	$ 8,117
Non-accrual loans	0	0
Accruing loans past due 90 days or more amounted	0	0
Consumer and Other Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	53	33
Consumer and Other Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	6	0
Consumer and Other Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Consumer and Other Loans [Member] | Financial Asset, Past Due [Member]
Loans	59	33
Consumer and Other Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	$ 13,890	$ 12,002

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