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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2016
Apr. 30, 2015
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 200,000 400,000 200,000 400,000
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     1,663  
Stock Issued During Period, Value, New Issues     26,527  
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     (187)  
Dividends, Preferred Stock $ (800) $ (800) (1,600) $ (1,600)
Foreign currency translation adjustments 420 (52) 202 (340)
Net Loss (15,414) $ (9,997) (27,193) (14,151)
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest 94,166   94,166  
Proceeds from Issuance of Common Stock     26,582 $ 16,773
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     1,663  
Stock Issued During Period, Value, New Issues     26,527  
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     (187)  
Dividends, Preferred Stock     (1,600)  
Foreign currency translation adjustments     202  
Net Loss     (27,085)  
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest 94,829   94,829  
Noncontrolling Interest [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest     (555)  
Net Loss     (108)  
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest $ (663)   $ (663)  
Common Stock [Member] | Common Stock [Member]        
Stock Issued During Period, Shares, New Issues     4,251,535  
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Proceeds from Issuance of Common Stock     $ 26,600  
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