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Stockholders' Equity - Summary of Stock Option Activity (Parenthetical) (Details) - $ / shares
Apr. 22, 2020
Sep. 30, 2020
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Repricing of outstanding options 1,475,093    
Stock Options      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Closing stock price per share   $ 5.77  
Repricing of outstanding options 1,475,093 2,474,461 1,821,093
Exercise price of repriced options per share $ 2.45