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Organization and Description of Business - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Jun. 28, 2024
Jun. 18, 2024
Sep. 21, 2020
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Reverse stock split ratio 0.05        
Reverse stock-split, description       On June 18, 2024, the Company’s stockholders approved a reverse stock split of its Class A common stock, Class B common stock and Class C common stock (collectively, the "common stock") at a ratio ranging from 1-for-10 to 1-for-20, with the exact ratio determined by the Company’s Board of Directors. On June 28, 2024, the Company's Board of Directors approved a 1-for-20 reverse stock split (Reverse Split) of its common stock that became effective on July 10, 2024.  
Proceeds from private placement     $ 100,000    
Accumulated deficit       $ 1,965,924 $ 1,757,778
Maximum [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Reverse stock split ratio   0.1      
Minimum [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Reverse stock split ratio   0.05      
Initial Public Offering [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Proceeds from issuance of common stock     $ 822,267