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Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 245,820 253,815
Convertible Preferred Stock, Shares Issued upon Conversion 454,043 454,043
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 11,835,571 1,981,181
Numerator [Abstract]    
Net Loss $ (13,685) $ (11,779)
Net Income (Loss) Attributable to Noncontrolling Interest 0 67
Dividends, Preferred Stock (800) (800)
Net loss attributable to common shareholders $ (14,485) $ (12,512)
Demoninator [Abstract]    
Weighted Average Number of Shares Outstanding, Diluted 37,613,216 26,246,271
Weighted Average Number Diluted Shares Outstanding Adjustment [1] 0 0
Weighted Average Number of Shares Outstanding, Basic 37,613,216 26,246,271
Earnings Per Share, Basic $ (0.39) $ (0.48)
Earnings Per Share, Diluted [1] $ (0.39) $ (0.48)
NRG Energy, Inc. [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 166,666 166,666
Option on Securities [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 904,041 451,088
Series 1 Preferred Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Convertible Preferred Stock, Shares Issued upon Conversion 2,385,001 655,569
[1] Due to the net loss to common shareholders in each of the periods presented above, diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. As of January 31, 2017 and 2016, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: January 31, 2017 January 31, 2016July 2016 Offering - Series A Warrants7,680,000 —July 2014 Offering - NRG Warrants166,666 166,666Outstanding options to purchase common stock245,820 253,815Unvested Restricted Stock Awards904,041 451,0885% Series B Cumulative Convertible Preferred Stock454,043 454,043Series 1 Preferred Shares to satisfy conversion requirements2,385,001 655,569 Total potentially dilutive securities11,835,571 1,981,181Refer to Note 12, Redeemable Preferred Stock, which is included in our Annual Report on Form 10-K for the year ended October 31, 2016 for information on the calculation of the common shares upon conversion.