Note 6 - Long-term Debt - Schedule of Long-term Debt (Details) (Parentheticals) - Term Loan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
First Lien Credit Facilities [Member]
Unamortized discount and costs	$ 9.0	$ 10.9
First Lien Credit Facilities [Member]
Effective interest rate	5.20%
First Lien Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate	3.50%	3.50%
First Lien Credit Facilities [Member] | Base Rate [Member]
Interest rate	3.50%	3.50%