Note 14 - Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Expected federal tax expense	$ 9,106	$ 11,600	$ 7,808
Nondeductible interest expense	10	8	31
Tax-exempt interest	(202)	(198)	(259)
State income taxes	308	326	207
Other, net	(288)	(23)	(650)
Total income tax expense	$ 8,934	$ 11,713	$ 7,137