Note 3 - Loans - Summary of Loan Classes and an Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Loans	$ 917,967	$ 920,523	$ 836,423
Non-accrual loans	1,591	2,673
Accruing loans past due 90 days or more amounted	47	0
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,874	1,314
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	46	235
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	1,194	2,337
Financial Asset, Past Due [Member]
Loans	3,114	3,886
Financial Asset, Not Past Due [Member]
Loans	914,853	916,637
Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	48,610	51,840	49,308
Non-accrual loans	1,044	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	427	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	1,003	1,045
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Financial Asset, Past Due [Member]
Loans	1,430	1,180
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Financial Asset, Not Past Due [Member]
Loans	47,180	50,660
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	334,302	331,421	290,408
Non-accrual loans	474	530
Accruing loans past due 90 days or more amounted	0	0
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,422	1,033
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans	16	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	82	207
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Financial Asset, Past Due [Member]
Loans	1,520	1,300
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Financial Asset, Not Past Due [Member]
Loans	332,782	330,121
Real Estate 1 [Member] \| Other Real Estate Loans [Member]
Loans	416,001	418,456	384,191
Non-accrual loans	73	13
Accruing loans past due 90 days or more amounted	47	0
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans	17	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	109	0
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Financial Asset, Past Due [Member]
Loans	126	109
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans	415,875	418,347
Commercial and Industrial Loans [Member]
Loans	110,937	111,225	103,682
Non-accrual loans	0	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	5	31
Commercial and Industrial Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans	16	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	21	1,246
Commercial and Industrial Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans	110,916	109,979
Consumer and Other Loans [Member]
Loans	8,117	7,581	$ 8,834
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	3	26
Consumer and Other Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans	14	25
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	17	51
Consumer and Other Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans	$ 8,100	$ 7,530