Note 9 - Income Taxes - (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Taxes.
Amount of discrete items recognized	$ 0.8		$ 0.8
Effective Income Tax Rate Reconciliation, Percent, Total	24.50%	19.60%	26.30%	24.60%
Statutory rate			21.00%