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Subsequent Events (Details) - Subsequent Events
1 Months Ended
Aug. 03, 2018
USD ($)
director
individual
$ / shares
Aug. 31, 2018
director
Subsequent Events    
Number of members on the Company's board of directors | director 11  
Forecast    
Subsequent Events    
Number of members on the Company's board of directors | director   12
Backstop Agreements    
Subsequent Events    
Basis of acquired diluted common stock - warrants rights (as a percent) 0.21%  
Strike price of warrants (in dollars per share) | $ / shares $ 0.01  
Fixed term to hold warrant prior to exercise 3 years  
Number of specified trading days within the prior 90 trading days the volume weighted average trading price of shares must equal or exceed the price trigger 60 days  
Number of consecutive trading days within which the volume weighted average trading price of shares must equal or exceed the trigger for the specified number of trading days 90 days  
Volume weighted average trading price of shares of Company common stock that must be attained or exceeded for the threshold number of trading days of the prior 90 trading days $ 13.13  
Backstop Agreements | York Group    
Subsequent Events    
Number of individuals appointed to the Company's board of directors | individual 3  
Backstop Agreements | York Group | Series A Convertible Preferred Stock    
Subsequent Events    
Purchase value commitment of shares, including warrants $ 9,900,000  
Backstop Agreements | Valinor Group    
Subsequent Events    
Number of individuals appointed to the Company's board of directors | individual 2  
Backstop Agreements | Valinor Group | Series A Convertible Preferred Stock    
Subsequent Events    
Purchase value commitment of shares, including warrants $ 3,400,000  
Backstop Agreements | Halcyon Group    
Subsequent Events    
Number of individuals appointed to the Company's board of directors | individual 1  
Backstop Agreements | Halcyon Group | Series A Convertible Preferred Stock    
Subsequent Events    
Purchase value commitment of shares, including warrants $ 1,700,000  
HGC Purchase Agreement | HGC    
Subsequent Events    
Number of individuals that may be appointed to the Company's board of directors | individual 1  
HGC Purchase Agreement | HGC | Maximum    
Subsequent Events    
Aggregate amount of equity or equity-linked securities that may be purchased under right of first refusal $ 350,000,000  
HGC Purchase Agreement | HGC | Series A Convertible Preferred Stock    
Subsequent Events    
Purchase value commitment of shares, including warrants $ 35,000,000