Note 13 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Expected federal income tax expense	$ 2,367	$ 3,975
Items affecting federal income tax:
State income taxes, net of federal income tax deduction	899	1,350
Other, net	(40)	40
Income tax expense	$ 3,226	$ 5,365