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Stockholders' Equity and Stock Incentive Plans - Summary of Activity Related To Time-based Restricted Stock Units (RSUs) and Performance-based Restricted Stock Units (PSUs) (Details)
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Restricted Stock Units (RSUs)  
Restricted Stock Units Outstanding  
Restricted Stock Units Outstanding, Beginning of year (in shares) 661,258
Restricted Stock Units Outstanding, Granted (in shares) 624,415
Restricted Stock Units Outstanding, Vested (in shares) (308,222)
Restricted Stock Units Outstanding, Cancelled (in shares) (29,669)
Restricted Stock Units Outstanding, End of year (in shares) 947,782
Weighted Average Grant Date Fair Value  
Weighted-Average Grant Date Fair Value, Beginning of year (USD per share) | $ / shares $ 16.44
Weighted-Average Grant Date Fair Value, Granted (USD per share) | $ / shares 9.65
Weighted-Average Grant Date Fair Value, Vested (USD per share) | $ / shares 16.06
Weighted-Average Grant Date Fair Value, Cancelled (USD per share) | $ / shares 16.89
Weighted-Average Grant Date Fair Value, End of year (USD per share) | $ / shares $ 12.07
Performance Stock Units (PSUs)  
Restricted Stock Units Outstanding  
Restricted Stock Units Outstanding, Beginning of year (in shares) 376,328
Restricted Stock Units Outstanding, Granted (in shares) 404,880
Restricted Stock Units Outstanding, Vested (in shares) (5,254)
Restricted Stock Units Outstanding, Cancelled (in shares) (32,235)
Restricted Stock Units Outstanding, End of year (in shares) 743,719
Weighted Average Grant Date Fair Value  
Weighted-Average Grant Date Fair Value, Beginning of year (USD per share) | $ / shares $ 20.65
Weighted-Average Grant Date Fair Value, Granted (USD per share) | $ / shares 8.86
Weighted-Average Grant Date Fair Value, Vested (USD per share) | $ / shares 28.72
Weighted-Average Grant Date Fair Value, Cancelled (USD per share) | $ / shares 28.72
Weighted-Average Grant Date Fair Value, End of year (USD per share) | $ / shares $ 13.82
Number of PSUs granted to each recipient, eligible to vest (in shares) 62,791
Percentage of target number of PSU's eligible to vest at "maximum" performance level 200.00%