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Stockholders' Equity - Schedule of Stockholders Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of October 31, 2017     $ 101,256  
Foreign currency translation adjustments $ 54 $ 32 87 $ (38)
Net loss (13,174) $ (13,238) (17,357) $ (26,923)
Balance as of April 30, 2018 102,291   102,291  
Parent [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance as of October 31, 2017     101,256  
Share-based compensation     1,378  
Proceeds from common stock issuance and warrant exercises, net of fees     3,268  
Common stock issued, non-employee compensation     282  
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans     (621)  
Preferred dividends – Series B     (1,600)  
Conversion of Redeemable Series C preferred stock     15,598  
Foreign currency translation adjustments     87  
Net loss     (17,357)  
Balance as of April 30, 2018 $ 102,291   $ 102,291