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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Line Items]      
Provision for income taxes $ 2,022 $ 1,143 $ 808
Increase (decrease) in valuation allowance 1,500 300  
Net operating loss carryforwards 353,500    
Unrecognized tax benefits 12,101 11,339 $ 5,615
Unrecognized tax benefits would affect the effective tax rate 0    
Interest related to unrecognized tax benefits 0 0  
Penalties related to unrecognized tax benefits 0 $ 0  
Federal      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 23,100    
Federal | Minimum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2024    
Federal | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount $ 28,300    
Federal | Research And Development Tax Credits | Minimum      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount, expiration year 2024    
Federal | Research And Development Tax Credits | Maximum      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount, expiration year 2043    
California and Other States      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 283,900    
California and Other States | Minimum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2024    
California and Other States | Maximum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2040    
California State | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount $ 22,300    
Foreign      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 0