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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2024
Dec. 31, 2007
CALIFORNIA    
Income Tax [Line Items]    
Net operating loss carryforwards $ 75.2  
Federal Income Tax    
Income Tax [Line Items]    
Net operating loss carryforwards $ 193.5 $ 156.5
Net operating loss carryforwards expiration year 2037  
Net operating loss carryforwards having indefinite life $ 191.9  
State Income Tax    
Income Tax [Line Items]    
Net operating loss carryforwards $ 10.5  
Net operating loss carryforwards expiration year 2034