Note 7 - Loans and the Allowance for Loan Losses - Loan Receivables on Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Loans receivable on nonaccrual status	$ 16,943	$ 18,088	$ 11,054
Commercial Real Estate Portfolio Segment [Member]
Loans receivable on nonaccrual status	14,175	14,786	7,716
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member]
Loans receivable on nonaccrual status	3,280	5,847	2,644
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans receivable on nonaccrual status	3,543	2,421	992
Commercial Real Estate Portfolio Segment [Member] | Residential [Member]
Loans receivable on nonaccrual status	7,352	6,518	4,080
Commercial Portfolio Segment [Member]
Loans receivable on nonaccrual status	2,395	3,045	3,150
Consumer Portfolio Segment [Member]
Loans receivable on nonaccrual status	$ 373	$ 257	$ 188