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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Jul. 12, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest     $ 94,754    
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures     2,530    
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     (125)    
Dividends, Preferred Stock $ (800) $ (800) (2,400) $ (2,400)  
Foreign currency translation adjustments (228) (64) (26) (404)  
Net Loss (11,067) $ (6,628) (38,260) (20,779)  
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest $ 124,764   124,764    
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs     2,600    
Proceeds from Issuance of Common Stock     $ 68,785 $ 22,061  
Common stock ownership percentage 4.99%   4.99%    
Parent [Member]          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest     $ 95,309    
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures     2,530    
Stock Issued During Period, Value, New Issues     33,529    
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     (125)    
Dividends, Preferred Stock     (2,400)    
Foreign currency translation adjustments     (26)    
Net Loss     (38,095)    
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest $ 125,484   125,484    
Noncontrolling Interest [Member]          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest     (555)    
Net Loss     (165)    
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest $ (720)   $ (720)    
Common Stock and Pre-Funded Warrants [Member]          
Stock Issued During Period, Shares, New Issues     1,474,000    
Common Stock and Pre-Funded Warrants [Member] | Parent [Member]          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock Issued During Period, Value, New Issues     $ 34,762    
Common Stock [Member] | Common Stock [Member]          
Stock Issued During Period, Shares, New Issues     5,484,272    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Proceeds from Issuance of Common Stock     $ 33,500    
NRG Energy [Member]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 200,000   200,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 40.20   $ 40.20    
Series A Warrant [Member]          
Class of Warrant or Right, Outstanding 7,680,000 0 7,680,000 0 7,680,000
Common stock issued during period, warrants exercised     0    
Warrants expired     0    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 5.83   $ 5.83    
Series B Warrant [Member]          
Class of Warrant or Right, Outstanding 4,926,000 0 4,926,000 0 4,926,000
Common stock issued during period, warrants exercised     0    
Warrants expired     0    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.0001   $ 0.0001