Note 12 - Securities Sold Under Agreements to Repurchase - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold under Agreements to Repurchase [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Outstanding balance at end of period	$ 133,342	$ 75,466
Weighted average interest rate at end of period	1.64%	0.04%
Average outstanding balance during the period	$ 122,154	$ 62,534	$ 40,363
Average interest rate during the period	0.46%	0.04%	0.09%
Maximum outstanding at any month end during the period	$ 161,512	$ 81,964	$ 47,979