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Redeemable Convertible Preferred Stock - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2020
Jun. 17, 2020
Dec. 31, 2019
Temporary Equity [Line Items]              
Redeemable convertible preferred stock, shares outstanding             20,390,095
Redeemable Convertible Preferred Stock              
Temporary Equity [Line Items]              
Preferred stock converted into common stock 28,610,337            
Redeemable convertible preferred stock, shares outstanding         0 0  
Series D Redeemable Convertible Preferred Stock              
Temporary Equity [Line Items]              
Preferred stock, shares issued   8,220,242   8,220,242      
Purchase price per share   $ 13.3816   $ 13.3816      
Aggregate purchase price   $ 110,000 $ 4 $ 109,875      
Redeemable convertible preferred stock, shares outstanding   8,220,242   8,220,242