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Convertible Preferred Stock - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Jun. 17, 2021
Dec. 31, 2020
Convertible preferred stock, shares issued   0     194,474,000
Proceeds from issuance of convertible preferred stock, net of issuance costs   $ 492,467    
Repurchase of convertible preferred stock     $ (3,582)    
Outstanding shares of convertible preferred stock converted into shares of common stock       194,474,431  
Outstanding convertible preferred stock (in shares)   0     194,474,000
Series C Convertible Preferred Stock          
Convertible preferred stock, shares issued 42,905,042        
Share price $ 11.49        
Proceeds from issuance of convertible preferred stock, net of issuance costs $ 492,500        
Net of issuance costs $ 500        
Series A Convertible Preferred Stock          
Repurchase of convertible preferred stock, shares 546,806        
Repurchase of convertible preferred stock $ 4,200