Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Accrued Expenses
Accrued payroll and compensation related costs	$ 29,167				$ 2,932
Accrued accounts payable	11,750				7,254
Accrued sales and other taxes	3,665				905
Accrued interest	649				2,374
Accrued other	852				944
Total	$ 46,083	$ 37,948	$ 23,917	$ 14,870	$ 14,409	$ 9,457	$ 4,522	$ 6,509