Note 16 - Off-balance Sheet Activities - Off-balance Sheet Financial Instruments Whose Contractual Amounts Represents Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments to Extend Credit [Member]
Off-balance sheet financial instruments outstanding	$ 614,705	$ 635,851
Standby Letters of Credit [Member]
Off-balance sheet financial instruments outstanding	17,228	12,897
Mortgage Loan Rate Lock Commitments [Member]
Off-balance sheet financial instruments outstanding	$ 1,822	$ 1,920