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Stock-based Compensation - Restricted Stock Activity (Details)
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Restricted Stock  
Shares  
Outstanding at beginning of period (in shares) | shares 1,815,891
Granted (in shares) | shares 0
Forfeited (in shares) | shares (89,063)
Vested (in shares) | shares (595,799)
Outstanding at end of period (in shares) | shares 1,131,029
Weighted Average Grant Date Fair Value per Share  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 1.15
Granted (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 1.14
Vested (in dollars per share) | $ / shares 0.96
Outstanding at end of period (in dollars per share) | $ / shares $ 1.16
Restricted Stock Units  
Shares  
Outstanding at beginning of period (in shares) | shares 0
Granted (in shares) | shares 6,015,840
Forfeited (in shares) | shares (66,717)
Vested (in shares) | shares (187,225)
Outstanding at end of period (in shares) | shares 5,761,898
Weighted Average Grant Date Fair Value per Share  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 0
Granted (in dollars per share) | $ / shares 21.64
Forfeited (in dollars per share) | $ / shares 22.14
Vested (in dollars per share) | $ / shares 23.76
Outstanding at end of period (in dollars per share) | $ / shares $ 22.46