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Subsequents Events - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended
Nov. 04, 2020
Apr. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Subsequent Event [Line Items]        
Common stock, shares issued   15,442,303 44,692,030 29,084,437
Proceeds from issue of common stock   $ 129.0    
JonesTrading International Services LLC | Sales Agreement | Subsequent Events        
Subsequent Event [Line Items]        
Common stock, shares issued 3,245,077      
Proceeds from issue of common stock $ 24.6