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Share-based Compensation - Summary of Company's Restricted Stock Activity (Details) - Restricted Stock
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Shares  
Unvested at beginning of period (in shares) | shares 2,213,775
Granted (in shares) | shares 0
Vested (in shares) | shares (1,063,434)
Forfeited (in shares) | shares (68,629)
Unvested at end of period (in shares) | shares 1,081,712
Weighted Average Grant Date Fair Value  
Unvested at beginning of period (in usd per share) | $ / shares $ 5.12
Granted (in usd per share) | $ / shares 0
Vested (in usd per share) | $ / shares 5.27
Forfeited (in usd per share) | $ / shares 5.10
Unvested at end of period (in usd per share) | $ / shares $ 4.98