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Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
Numerator [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ (12,948) | $ (11,067) | $ (15,414) | $ (11,779) | $ (8,905) | $ (6,628) | $ (9,997) | $ (4,154) | $ (51,208) | $ (29,684) |  | $ (38,883) |  | $ (38,883)
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | 251 | 325 |  | 758 |  |
Dividends, Preferred Stock |  | (800) | (800) | (800) | (800) | (800) | (800) | (800) | (800) | (3,200) | (3,200) |  | (3,200) |  |
Net loss to common shareholders |  | $ (13,662) | $ (11,810) | $ (16,173) | $ (12,512) | $ (9,660) | $ (7,339) | $ (10,694) | $ (4,866) | $ (54,157) | $ (32,559) |  | $ (41,325) |  |
Demoninator [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic |  |  |  |  |  |  |  |  |  | 29,773,700 | 24,513,731 |  | 20,473,915 |  |
Weighted Average Number Diluted Shares Outstanding Adjustment | [1] |  |  |  |  |  |  |  |  | 0 | 0 |  | 0 |  |
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  |  |  | 29,773,700 | 24,513,731 |  | 20,473,915 |  |
Earnings Per Share, Basic |  |  |  |  |  |  |  |  |  | $ (1.82) | $ (1.33) |  | $ (2.02) |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  | $ (1.82) | $ (1.33) | [1] | $ (2.02) | [1] |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 14,331,463 |  |  |  | 1,666,461 |  |  |  | 14,331,463 | 1,666,461 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  | 990,035 |  |  |  | 483,570 |  |  |  | 990,035 | 483,570 |  |  |  |
Shares of Common Stock Issued upon Conversion | [2] | 454,043 |  |  |  | 454,043 |  |  |  | 454,043 | 454,043 |  |  |  |
Series 1 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of Common Stock Issued upon Conversion | [2] | 1,042,000 |  |  |  | 337,200 |  |  |  | 1,042,000 | 337,200 |  |  |  |
Series A Warrant [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 |  | 7,680,000 |  |  |  | 0 |  |  |  | 7,680,000 | 0 |  |  |  |
Series B Warrant [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 |  | 3,826,000 |  |  |  | 0 |  |  |  | 3,826,000 | 0 |  |  |  |
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 |  |  |  |
Option on Securities [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 |  | 246,923 |  |  |  | 257,769 |  |  |  | 246,923 | 257,769 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  | 915,831 |  |  |  | 450,783 |  |  |  | 915,831 | 450,783 |  |  |  |
[1] | Due to the net loss to common shareholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. At October 31, 2016 and 2015, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: October 31, 2016 October 31, 2015July 2016 Offering - Series A Warrants7,680,000 —July 2016 Offering - Series B Warrants3,826,000 —July 2014 Offering - NRG Warrants166,666 166,666Outstanding options to purchase common stock246,923 257,769Unvested RSAs915,831 450,7835% Series B Cumulative Convertible Preferred Stock (2)454,043 454,043Series 1 Preferred Shares to satisfy conversion requirements (2)1,042,000 337,200 Total potentially dilutive securities14,331,463 1,666,461(2)Refer to Note 12, Redeemable Preferred Stock, for information on the calculation of the common shares upon conversion.
[2] | Refer to Note 12, Redeemable Preferred Stock, for information on the calculation of the common shares upon conversion.

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