Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 6,448	$ 2,241	$ 441
Increases related to tax positions taken during a prior year	5	4	0
Increases related to tax positions taken during the current year	13,821	4,203	1,800
Ending balance	$ 20,274	$ 6,448	$ 2,241