Note 8 - Debt - Debt Outstanding (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Finance lease liabilities		$ 0.1	$ 0.1
Unamortized debt issuance costs		0.0	(3.1)
Total debt		268.4	308.5
Less: current portion of long-term debt(a)	[1]	(3.7)	(10.9)
Long-term debt		264.7	297.6
Secured Debt [Member]
Long-term debt, gross		0.9	1.5
Senior Unsecured Notes [Member]
Long-term debt, gross		0.0	300.0
The 2021 Credit Agreement [Member] | Term Loan [Member]
Long-term debt, gross		99.4	0.0
The 2021 Credit Agreement [Member] | Revolving Credit Facility [Member]
Long-term debt, gross		$ 168.0	$ 10.0

[1] As of September 30, 2021, the Company is required to repay $3.1 million in outstanding credit facility borrowings and $0.6 million of current maturities of secured borrowings over the next 12 months.