Note 11 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Expected provision at the statutory rate	$ 7,437	$ 5,873	$ 3,203
Tax-exempt income	(2,163)	(1,686)	(865)
Bank owned life insurance	(242)	(232)	(167)
Nondeductible interest expense	175	87	54
Nondeductible other expenses and other, net	306	49	(8)
Tax credits	(120)	(135)	0
State income tax	54	45	32
Total provision for income taxes	$ 5,447	$ 4,001	$ 2,249