Note 13 - Commitments - Schedule of Financial Commitments Represents Credit Risk (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Financial commitments, contractual amount, fixed rate	$ 470,121
Financial commitments, contractual amount, variable rate		$ 460,161
Standby Letters of Credit [Member]
Financial commitments, contractual amount, fixed rate	4,328
Financial commitments, contractual amount, variable rate		4,728
Commitments to Make Loans [Member]
Financial commitments, contractual amount, fixed rate	202,537
Financial commitments, contractual amount, variable rate		202,288
Unused lines of Credit [Member]
Financial commitments, contractual amount, fixed rate	260,255
Financial commitments, contractual amount, variable rate		251,931
Commercial And Similar Letters Of Credit [Member]
Financial commitments, contractual amount, fixed rate	$ 3,001
Financial commitments, contractual amount, variable rate		$ 1,214