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Equity - Narrative (Details) - $ / shares
 24 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Oct. 01, 2016
Class of Stock      
Common stock, shares issued 35,691,000 35,650,000  
Common stock, shares outstanding 35,691,000 35,650,000  
Unvested awards 400,000    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001  
Common stock, shares authorized 250,000,000 250,000,000  
Series A Warrants      
Class of Stock      
Plan of Reorganization, Equity Interest Issuable, Number of Shares 4,600,000    
Number of common shares exercised for each warrant     1
Exercise price (in usd per share)     $ 41.34
Series B Warrants      
Class of Stock      
Plan of Reorganization, Equity Interest Issuable, Number of Shares 2,000,000.0    
Number of common shares exercised for each warrant     1
Exercise price (in usd per share)     $ 42.03
Restricted Stock      
Class of Stock      
Unvested awards 383,000 1,105,000