Note 15 - Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Operating lease assets		$ 41.3	$ 44.5
Total leased assets		41.4	44.6
Long-term operating lease liabilities		25.4	28.7
Total lease liabilities		41.9	45.1
Property, Plant and Equipment [Member]
Finance lease assets	[1]	0.1	0.1
Other Current Liabilities [Member]
Operating leases		16.4	16.3
Current Portion of Long-term Debt [Member]
Finance liabilities, current		0.0	0.1
Long-term Debt [Member]
Finance liabilities, noncurrent		$ 0.1	$ 0.0

[1] Finance lease assets are recorded net of accumulated amortization of less than $0.1 million and $0.2 million as of December 31, 2021 and December 31, 2020, respectively.