Summary of Significant Accounting Policies - Summary of Depreciation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cost of revenues	$ 21,755	$ 16,882	$ 6,722
Operating expense	56,637	55,181	28,037
General and administrative expense	$ 3,429	$ 3,145	$ 4,233