Note 3 - Loans - Analysis of the Credit Risk Profile of Each Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans	$ 581,867	$ 574,346
Pass [Member]
Loans	569,919	563,408
Special Mention [Member]
Loans	6,058	6,069
Substandard [Member]
Loans	5,890	4,869
Doubtful [Member]
Loans
Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	40,279	43,164
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Pass [Member]
Loans	39,720	42,636
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Special Mention [Member]
Loans
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Substandard [Member]
Loans	559	528
Real Estate 1 [Member] \| Construction and Land Development [Member] \| Doubtful [Member]
Loans
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	230,980	229,438
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Pass [Member]
Loans	229,539	228,029
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Special Mention [Member]
Loans	519	524
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Substandard [Member]
Loans	922	885
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member] \| Doubtful [Member]
Loans
Real Estate 1 [Member] \| Other Real Estate Loans [Member]
Loans	241,374	236,555
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Pass [Member]
Loans	238,643	233,240
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Special Mention [Member]
Loans		537
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Substandard [Member]
Loans	2,731	2,778
Real Estate 1 [Member] \| Other Real Estate Loans [Member] \| Doubtful [Member]
Loans
Commercial and Industrial Loans [Member]
Loans	55,508	50,153
Commercial and Industrial Loans [Member] \| Pass [Member]
Loans	52,325	48,527
Commercial and Industrial Loans [Member] \| Special Mention [Member]
Loans	1,505	948
Commercial and Industrial Loans [Member] \| Substandard [Member]
Loans	1,678	678
Commercial and Industrial Loans [Member] \| Doubtful [Member]
Loans
Consumer and Other Loans [Member]
Loans	13,726	15,036
Consumer and Other Loans [Member] \| Pass [Member]
Loans	9,692	10,976
Consumer and Other Loans [Member] \| Special Mention [Member]
Loans	4,034	4,060
Consumer and Other Loans [Member] \| Substandard [Member]
Loans
Consumer and Other Loans [Member] \| Doubtful [Member]
Loans