Other Accrued Liabilities (Schedule of Other Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Accrued Liabilities [Abstract]
Legal settlement accrual	$ 14,700
Customer deposits	12,006	$ 7,727
Sales returns reserve	5,760	5,434
Accrued wages and salaries	5,323	4,064
Payroll and sales taxes	5,406	2,764
Other current liabilities	6,074	4,600
Total other accrued liabilities	$ 49,269	$ 24,589