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Stock-Based Awards - Summary of Restricted Stock Activity (Details) - Restricted Stock
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Shares, Unvested, Beginning Balance | shares 2,075,511
Number of Shares, Vested | shares (1,791,880)
Number of Shares, Unvested, Ending Balance | shares 283,631
Weighted Average Fair Value at Date of Grant Per Share, Beginning Balance | $ / shares $ 0.95
Weighted Average Fair Value at Date of Grant Per Share, Vested | $ / shares 0.91
Weighted Average Fair Value at Date of Grant Per Share, Ending Balance | $ / shares $ 1.15