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Equity - Narrative (Details) - $ / shares | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Class of Stock |  |
Common stock, shares issued (in shares) | 35,762,000 | 35,687,000
Common stock, shares outstanding (in shares) | 35,762,000 | 35,687,000
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001
Unvested options (in shares) | 300,000 |
Common stock, shares authorized (in shares) | 250,000,000.0 | 250,000,000
Series A Warrants |  |
Class of Stock |  |
Plan of reorganization, equity interest issuable (in shares) | 4,600,000 |
Number of common shares exercised for each warrant (in shares) | 1 |
Exercise price (in usd per share) | $ 41.34 |
Series B Warrants |  |
Class of Stock |  |
Plan of reorganization, equity interest issuable (in shares) | 2,000,000.0 |
Number of common shares exercised for each warrant (in shares) | 1 |
Exercise price (in usd per share) | $ 42.03 |
Restricted Stock |  |
Class of Stock |  |
Unvested awards (in shares) | 300,000 |
Performance Share Units |  |
Class of Stock |  |
Unvested awards (in shares) | 100,000 |

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