Note 9 - Income Taxes - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Taxes.
Amount of discrete items recognized	$ 1.0		$ 1.0
Effective Income Tax Rate Reconciliation, Percent, Total	9.30%	22.00%	28.00%	20.50%
Statutory rate			21.00%