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Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Details) - Restricted Stock Units
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, Number of Shares, Beginning Balance | shares 2,850,053
Vested, Number of Shares | shares (712,510)
Cancelled or forfeited, Number of Shares | shares (250,778)
Nonvested, Number of Shares, Ending Balance | shares 1,886,765
Nonvested, Weighted Average Grant Date Fair Value per Share, Beginning Balance | $ / shares $ 6.37
Vested, Weighted Average Grant Date Fair Value per Share | $ / shares 6.37
Cancelled or forfeited, Weighted Average Grant Date Fair Value per Share | $ / shares 5.25
Nonvested, Weighted Average Grant Date Fair Value per Share, Ending Balance | $ / shares $ 6.52