Stock-based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 14,530	$ 2,284	$ 16,367	$ 3,413
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,127	82	1,210	154
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	5,663	632	6,425	1,067
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	934	102	1,120	184
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 6,806	$ 1,468	$ 7,612	$ 2,008