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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Income Tax [Line Items]    
Federal net operating losses $ 1,600,000  
State net operating losses 2,000,000  
Foreign net operating losses 14,300  
Valuation allowance 648,444 $ 491,755
Increase (decrease) in valuation allowance (156,600) 116,600
Portion of valuation allowance credited directly to contributed capital 200  
Deferred tax assets not recognized due to limitations 274,100  
Research and development credits 56,610 40,954
Deferred tax assets, interest expense temporarily disallowed 164,600 $ 77,600
Unrecognized tax benefits that would not impact effective tax rate 15,100  
Federal    
Income Tax [Line Items]    
Net operating losses not subject to expiration 1,200,000  
Research and development credits 47,700  
Other tax credits 1,300  
State    
Income Tax [Line Items]    
Net operating losses not subject to expiration 50,700  
Research and development credits $ 29,600