Note 17 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal	$ 4.2	$ 9.6	$ 3.7
Foreign	3.8	5.6	7.0
State	1.8	2.1	1.0
Current Income Tax Expense (Benefit), Total	9.8	17.3	11.7
Federal	4.4	(2.4)	(3.1)
Foreign	(6.9)	(6.7)	(6.0)
State	0.1	(0.1)	(0.3)
Deferred Income Tax Expense (Benefit), Total	(2.4)	(9.2)	(9.4)
Federal	8.6	7.2	0.6
Foreign	(3.1)	(1.1)	1.0
State	1.9	2.0	0.7
Total Income Tax Expense	$ 7.4	$ 8.1	$ 2.3

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