Note 5 - Loans and ACL for Loans - Loans to Directors and Their Associates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance at beginning of period	$ 53,574	$ 43,091
Effect of change in composition of directors and executive officers	1,124	240
New term loans	15,000	5,000
Repayment of term loans	(1,588)	(3,671)
Changes in balances of revolving lines of credit	10,575	8,914
Balance at end of period	$ 78,685	$ 53,574