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Earnings Per Share - Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation (Details) - shares | 12 Months Ended
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Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 52,639,187 | 43,730,747 | 13,378,835
Series C Warrants [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 11,569,364 | 11,580,900 |
Series D Warrants [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  |  | 2,584,174 |
Series A Warrant [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 7,680,000 | 7,680,000 | 7,680,000
Series B Warrants [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  |  |  | 3,826,000
NRG Energy, Inc. [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  |  |  | 166,666
Outstanding Options To Purchase Common Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 323,486 | 309,950 | 246,923
Unvested Restricted Stock Awards [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 1,119,433 | 1,898,692 | 915,831
Unvested Restricted Stock Units [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 3,251,142 | 1,109,994 | 74,204
Series C Preferred Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation | [1] | 5,994,667 | 18,097,826 | 0
Series D Preferred Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation | [2] | 22,231,884 |  |
Series B Cumulative Preferred Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation | [3] | 454,043 | 454,043 | 454,043
Series 1 Preferred Shares [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation | [3] | 15,168 | 15,168 | 15,168
[1] | The number of shares of common stock issuable upon conversion of the Series C Preferred Stock was calculated using the liquidation preference value outstanding on October 31, 2018 of $9.0 million divided by the reduced conversion price of $1.50 and the liquidation preference of $33.3 million divided by the conversion price of $1.84 as of October 31, 2017. The actual number of shares issued could vary depending on the actual market price of the Company’s common shares on the date of such conversions.
[2] | The number of shares of common stock issuable upon conversion of the Series D Preferred Stock was calculated using the liquidation preference value outstanding on October 31, 2018 of $30.7 million divided by the conversion price of $1.38. The actual number of shares issued could vary depending on the actual market price of the Company’s common shares on the date of such conversions.
[3] | Refer to Note 14, Redeemable Preferred Stock, for information on the calculation of the common shares upon conversion.

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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