Stock-Based Compensation - Summary of Total Stock-based Compensation Expense by Function (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 5,171	$ 11,873	$ 12,610	$ 13,373
Sales and Distribution Expenses
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	(579)	2,409	1,013	2,797
Research and Development Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	1,179	1,872	2,452	2,032
General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 4,571	$ 7,592	$ 9,145	$ 8,544