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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended 24 Months Ended
Nov. 30, 2021
Sep. 30, 2024
USD ($)
Claim
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
Claim
Sep. 30, 2023
USD ($)
Nov. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Gain Contingencies [Line Items]              
Aggregate sublease payment receivable           $ 3,400,000  
Sublease income   $ 0 $ 600,000 $ 0 $ 1,700,000    
Operating lease right-of-use asset   17,050,000   17,050,000     $ 18,009,000
Lease liabilities   $ 29,607,000   $ 29,607,000      
Weighted average incremental borrowing rate   8.40%   8.40%      
Operating lease costs   $ 1,000,000 500,000 $ 2,900,000 1,600,000    
Variable lease payments   500,000 $ 400,000 1,700,000 $ 1,100,000    
Loss contingency accrual   $ 0   $ 0      
Indemnification Agreement [Member]              
Gain Contingencies [Line Items]              
Loss contingency pending claims | Claim   0   0      
Brisbane, California [Member]              
Gain Contingencies [Line Items]              
Operating lease, term of contract   10 years   10 years      
Operating lease, expiration month and year       2031-10      
Operating lease, renewal term   10 years   10 years      
Lessee, Operating Sublease Commencement Year and Month 2021-12            
Lessee operating sublease expiration year and month 2023-11            
Operating lease right-of-use asset   $ 17,100,000   $ 17,100,000      
Lease liabilities   $ 29,600,000   $ 29,600,000      
Weighted average remaining lease term   7 years 1 month 6 days   7 years 1 month 6 days