Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Accounting Policies [Line Items]
Recognition method for costs of obtaining a contract	The Company has elected the practical expedient in ASC 340, Other Assets and Deferred Costs, wherein it recognizes the incremental costs of obtaining a contract as an expense when incurred if, at inception, the expected amortization period of the asset that the Company otherwise would have recognized is one year or less.
Incremental cost included in general and administration costs	$ 45,785,000	$ 21,640,000	$ 4,438,000
Right-of-use asset	161,000
Impairment losses	$ 0	$ 0	$ 0
Expected dividend yield	0.00%	0.00%	0.00%
Comprehensive income or loss	$ 0	$ 0	$ 0
Number of operating segments | Segment	1
Number of reportable segments | Segment	1
Other Assets
Accounting Policies [Line Items]
Bank deposits, restricted cash	$ 305,000
Right-of-use asset	161,000
Incremental Cost | Roche License
Accounting Policies [Line Items]
Incremental cost included in general and administration costs	$ 7,000,000