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Redeemable Convertible Preferred Stock - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Jan. 31, 2020
Jun. 30, 2020
Jan. 10, 2020
Dec. 31, 2019
Temporary Equity [Line Items]        
Preferred stock, par value     $ 0.001  
Series C Redeemable Convertible Preferred Stock        
Temporary Equity [Line Items]        
Preferred stock, shares authorized   0   0
Preferred stock, par value   $ 0.001   $ 0.001
Preferred stock, shares issued 78,306,611 0   0
Preferred stock, shares issued price per share $ 0.38811      
Proceeds from the sale of Series C redeemable convertible preferred stock $ 30.4      
Maximum        
Temporary Equity [Line Items]        
Preferred stock, shares authorized     299,300,288