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Common Stock and Share-Based Compensation - Restricted Stock Activity (Details)
12 Months Ended
Dec. 31, 2019
$ / shares
shares
PSUs  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Outstanding at beginning of period (shares) | shares 291,773
Granted (shares) | shares 761,335
Vested (shares) | shares (26,734)
Forfeited (shares) | shares (472,891)
Performance adjustment (shares) | shares (240,761)
Outstanding at end of period (shares) | shares 312,722
Weighted-Average Grant Date Fair Value  
Outstanding at beginning of period (USD per share) | $ / shares $ 9.94
Granted (USD per share) | $ / shares 3.06
Vested (USD per share) | $ / shares 18.93
Forfeited (USD per share) | $ / shares 3.37
Performance adjustment (USD per share) | $ / shares 8.92
Outstanding at end of period (USD per share) | $ / shares $ 3.15
Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Outstanding at beginning of period (shares) | shares 87,526
Granted (shares) | shares 156,961
Vested (shares) | shares (88,164)
Outstanding at end of period (shares) | shares 156,323
Weighted-Average Grant Date Fair Value  
Outstanding at beginning of period (USD per share) | $ / shares $ 8.44
Granted (USD per share) | $ / shares 1.42
Vested (USD per share) | $ / shares 4.59
Outstanding at end of period (USD per share) | $ / shares $ 3.56