Commitment and Contingencies - Schedule of Operating Lease Costs, Variable Lease Costs and Sub Lease Income (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Operating lease costs	$ 1,869	$ 1,869
Variable lease costs	1,636	1,689
Sublease income	(705)	(685)
Net lease cost	$ 2,800	$ 2,873