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Income Taxes - Narrative (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Line Items]      
Increase (decrease) in valuation allowance $ (7,900) $ 1,500  
Net operating loss carryforwards 293,100    
Unrecognized tax benefits 12,400 12,101 $ 11,339
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 400    
Federal | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount $ 26,500    
Federal | Minimum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2025    
Federal | Minimum | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount, expiration year 2025    
Federal | Maximum | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount, expiration year 2044    
California and Other States      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 262,900    
California and Other States | Minimum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2025    
California and Other States | Maximum      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards, expiration year 2041    
California State | Research And Development Tax Credits      
Income Tax Disclosure [Line Items]      
Tax credit carryforward amount $ 21,800    
Foreign      
Income Tax Disclosure [Line Items]      
Net operating loss carryforwards $ 0