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Stock-Based Compensation - Summary of Restricted Common Stock Activity (Details) - Restricted Common Stock - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Number of Shares    
Number of Shares, Unvested at January 1, 2021 3,410,979  
Number of Shares, Granted 1,192,513  
Number of Shares, Forfeited (127,104)  
Number of Shares, Vested (1,609,479)  
Number of Shares, Unvested at December 31, 2021 2,866,909 3,410,979
Weighted Average Grant Date Fair Value    
Weighted Average Grant Date Fair Value, Unvested at January 1, 2021 $ 3.55  
Weighted Average Grant Date Fair Value, Granted 33.61 $ 21.07
Weighted Average Grant Date Fair Value, Forfeited 25.91  
Weighted Average Grant Date Fair Value, Vested 2.87 1.84
Weighted Average Grant Date Fair Value, Unvested at December 31, 2021 $ 15.45 $ 3.55