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Subsequent Events - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended 126 Months Ended
Oct. 01, 2021
Dec. 31, 2020
Dec. 31, 2032
Subsequent Event [Line Items]      
Aggregate base rent payable   $ 0  
Forecast | San Diego, California      
Subsequent Event [Line Items]      
Aggregate base rent payable     $ 38,000
Subsequent Event | Letter of Credit      
Subsequent Event [Line Items]      
Restricted Cash $ 800    
Percentage of reduction in debt 50.00%    
Subsequent Event | San Diego, California      
Subsequent Event [Line Items]      
Operating lease not yet commenced description On October 1, 2021, the Company entered into a noncancelable lease agreement to lease office and laboratory space in San Diego, California. The targeted lease commencement date is July 2022    
Operating lease not yet commenced, term of contract 126 months    
Operating lease not yet commenced, option to extend one option to extend the lease term for a period of 5 years    
Lessee, Operating Lease, Lease Not yet Commenced, Existence of Option to Terminate [true false] true    
Operating lease not yet commenced renewal term 5 years    
Annual increase in rental payments percentage 3.00%    
Allowance from landlord $ 10,600