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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Oct. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Dividends, Preferred Stock $ (800) $ (800)  
Foreign currency translation adjustments (70) (218)  
Net Loss (13,685) (11,779)  
Proceeds from Issuance of Common Stock 4,977 $ 13,306  
Parent [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest 114,396    
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures 1,013    
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures 49    
Dividends, Preferred Stock (800)    
Foreign currency translation adjustments (70)    
Net Loss (13,685)    
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest $ 105,682    
Common Stock [Member] | Common Stock [Member]      
Stock Issued During Period, Shares, New Issues 2,200,000    
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Proceeds from Issuance of Common Stock $ 4,900    
NRG Energy, Inc. [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common stock ownership percentage 3.00%    
NRG Energy [Member]      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 200,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 40.20    
Common Stock and Pre-Funded Warrants [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stock Issued During Period, Value, New Issues $ 4,779    
Series A Warrant [Member]      
Class of Warrant or Right, Outstanding 7,680,000 0  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 5.83    
Series B Warrant [Member]      
Class of Warrant or Right, Outstanding 4,926,000   3,826,000