Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Expenses
Accrued royalties	$ 12,531	$ 21,893
Accrued product taxes and fees	3,903
Accrued bonuses	2,331	4,047
Accrued incentive compensation	1,586	1,650
Accrued interest	1,436	473
Accrued payroll and related benefits	1,284	1,154
Accrued audit and legal	623	308
Accrued sales and marketing	424	775
Accrued other operating costs	993	3,180
Total accrued expenses	$ 25,111	$ 33,480