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Nature of the Business - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended 162 Months Ended
Sep. 30, 2023
Dec. 31, 2020
Sep. 30, 2023
Dec. 31, 2022
Nature Of Business [Line Items]        
Accumulated deficit $ 2,536,953   $ 2,536,953 $ 2,028,170
Net income from up-front   $ 606,100    
Up-front payments receive 1,000,000      
Redeemable Convertible Preferred Stock [Member] | Convertible Notes [Member] | Initial Public Offering [Member]        
Nature Of Business [Line Items]        
Accumulated deficit $ 2,500,000   2,500,000  
Net proceeds from sale of equity and notes     $ 2,800,000