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Leases - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2023
USD ($)
Jan. 31, 2021
renewalOption
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Oct. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Lessee Lease Description [Line Items]                  
Operating lease right-of-use assets     $ 26,779,000   $ 26,779,000   $ 30,997,000    
Total lease liabilities     25,581,000   25,581,000        
Operating lease rent expense recognized     $ 2,700,000 $ 1,900,000 5,400,000 $ 3,900,000      
New Corporate Headquarters Facility                  
Lessee Lease Description [Line Items]                  
Number of renewal options | renewalOption   2              
Operating lease, renewal term   60 months              
Operating lease, extended term   60 days              
San Carlos                  
Lessee Lease Description [Line Items]                  
Operating lease right-of-use assets                 $ 28,400,000
Total lease liabilities                 $ 12,900,000
Lonza Commercial Manufacturing and Supply Agreement                  
Lessee Lease Description [Line Items]                  
Operating lease right-of-use assets             0    
Total lease liabilities             $ 0    
Operating lease rent expense recognized         $ 0        
Assignment Agreement                  
Lessee Lease Description [Line Items]                  
Operating lease right-of-use assets               $ 16,700,000  
Total lease liabilities               $ 16,800,000  
Operating lease, agreement term     10 years   10 years        
Assumed lease rental payment $ 1,900,000                
Operating lease, rent adjustment percentage     0.03   0.03