Note 7 - Loans and the Allowance for Loan Losses - Loan Receivables on Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans receivable on nonaccrual status	$ 11,054	$ 12,868
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member]
Loans receivable on nonaccrual status	992	1,341
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member]
Loans receivable on nonaccrual status	16	76
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member]
Loans receivable on nonaccrual status	2,628	2,614
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member]
Loans receivable on nonaccrual status	4,080	3,601
Residential Portfolio Segment [Member] | Multi-family Residential [Member]
Loans receivable on nonaccrual status	0	0
Commercial Portfolio Segment [Member]
Loans receivable on nonaccrual status	3,033	4,947
Consumer Portfolio Segment [Member]
Loans receivable on nonaccrual status	$ 305	$ 289