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Loss Per Share (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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 247,776 254,124 247,776 254,124  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     13,020,442 420,790  
Numerator [Abstract]          
Net Loss $ (11,067) $ (6,628) $ (38,260) $ (20,779)  
Net Income (Loss) Attributable to Noncontrolling Interest 57 89 165 280  
Dividends, Preferred Stock (800) (800) (2,400) (2,400)  
Net loss attributable to common shareholders $ (11,810) $ (7,339) $ (40,495) $ (22,899)  
Demoninator [Abstract]          
Weighted Average Number of Shares Outstanding, Diluted 31,015,658 24,884,103 28,680,596 24,312,330  
Weighted Average Number Diluted Shares Outstanding Adjustment [1] 0 0 0 0  
Weighted Average Number of Shares Outstanding, Basic 31,015,658 24,884,103 28,680,596 24,312,330  
Earnings Per Share, Basic $ (0.38) $ (0.29) $ (1.41) $ (0.94)  
Earnings Per Share, Diluted [1] $ (0.38) $ (0.29) $ (1.41) $ (0.94)  
Series A Warrant [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Class of Warrant or Right, Outstanding 7,680,000 0 7,680,000 0 7,680,000
Series B Warrant [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Class of Warrant or Right, Outstanding 4,926,000 0 4,926,000 0 4,926,000
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 166,666 166,666 166,666 166,666  
[1] Diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. Potentially dilutive instruments include stock options, unvested restricted stock awards, convertible preferred stock and warrants. As of July 31, 2016 and 2015, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: July 31, 2016 July 31, 2015July 2016 Offering - Series A Warrants7,680,000 —July 2016 Offering - Series B Warrants4,926,000 —July 2014 Offering - NRG Warrants166,666 166,666Outstanding options to purchase common stock247,776 254,124 Total potentially dilutive securities13,020,442 420,790