Note 6 - Borrowings - Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Total borrowings		$ 393,186	$ 400,068
Less — unamortized discount and finance fees		1,346	2,368
Total borrowings — net		391,840	397,700
Less — long term debt due within one year		16,124	4,400
Total long-term portion of borrowings — net		$ 375,716	393,300
Asset-backed Loan Facility [Member]
Interest Rate	[1]	floating
Maturity Date	[2]	Dec. 07, 2022
Total borrowings		$ 17,386	19,868
Term Loan B [Member]
Interest Rate	[3]	floating
Maturity Date		Apr. 09, 2021
Total borrowings		$ 375,800	$ 380,200

[1] The interest rate on the ABL Facility borrowings was 1.75 percent at December 31, 2019.

[2] Maturity date will be January 9, 2021, if Term Loan B is not refinanced by this date.

[3] See interest rate swaps under "Term Loan B" below and note 12.