Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent	20.40%	23.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Tax Credit Carryforward, Amount	$ 0
Operating Loss Carryforwards	$ 0		$ 0