Commitments and Contingencies - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 28, 2019 USD ($) ft² renewal	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	Oct. 31, 2018 USD ($) ft²	Aug. 31, 2018 ft²
Operating Leased Assets [Line Items]
Area of office and laboratory (in square feet) | ft²					14,943	68,000
Operating lease term					124 months	127 months
Operating lease, option to extend term (in years)					7 years	7 years
Tenant improvements		$ 5,000
Allowance for tenant improvements		325			$ 800
Letter of credit		5,200	$ 4,300
Cash paid for amounts included in measurement of lease liabilities		$ 1,000
Weighted average discount rate (as a percent)		8.40%
Weighted average remaining lease term (in years)		10 years 2 months 19 days
Agreement term				20 years
Termination payment				$ 4,300
Non-cancellable purchase commitments		$ 4,100
Letter of Credit
Operating Leased Assets [Line Items]
Letter of credit		4,300
Newark
Operating Leased Assets [Line Items]
Operating lease term	188 months
Operating lease, option to extend term (in years)	10 years
Allowance for tenant improvements	$ 2,900
Area of operating lease (in square feet) | ft²	118,000
Number of options to extend lease | renewal	2
Tenant improvement allowance utilized to date		$ 2,700