Note 11 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Unrecognized Tax Benefits	$ 25.2		$ 24.8
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations			$ 5.6
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	0.1	$ 0.2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 4.0