Note 10 - Securities Sold Under Agreements to Repurchase - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold under Agreements to Repurchase [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Outstanding balance at end of period	$ 104,578		$ 133,342
Weighted average interest rate at end of period	1.14%		1.64%
Average outstanding balance during the period	$ 122,049	$ 91,082
Average interest rate during the period	1.52%	0.08%
Maximum outstanding at any month end during the period	$ 133,740	$ 142,146