Note 6 - Long-term Debt - Interest on Borrowings (Details)	Sep. 30, 2021	Dec. 31, 2020
Senior Secured Term Loan B and Global ABL Facility [Member]
Weighted average interest rate	5.11%	4.93%
Global ABL Facility [Member]
Weighted average interest rate	1.83%	0.00%
Senior Secured Term Loan B [Member]
Weighted average interest rate	5.41%	4.93%