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Loss Per Share (Tables) | 9 Months Ended
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Jul. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | 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, 2015
July 2016 Offering - Series A Warrants | 7,680,000 |  |  | — |
July 2016 Offering - Series B Warrants | 4,926,000 |  |  | — |
July 2014 Offering - NRG Warrants | 166,666 |  |  | 166,666 |
Outstanding options to purchase common stock | 247,776 |  |  | 254,124 |
Total potentially dilutive securities | 13,020,442 |  |  | 420,790 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The calculation of basic and diluted loss per share was as follows:
| Three Months Ended July 31, |  | Nine Months Ended July 31,
| 2016 |  | 2015 |  | 2016 |  | 2015
Numerator |  |  |  |  |  |  |
Net loss | $ | (11,067 | ) |  | $ | (6,628 | ) |  | $ | (38,260 | ) |  | $ | (20,779 | )
Net loss attributable to noncontrolling interest | 57 |  |  | 89 |  |  | 165 |  |  | 280 |
Preferred stock dividend | (800 | ) |  | (800 | ) |  | (2,400 | ) |  | (2,400 | )
Net loss attributable to common shareholders | $ | (11,810 | ) |  | $ | (7,339 | ) |  | $ | (40,495 | ) |  | $ | (22,899 | )
Denominator |  |  |  |  |  |  |
Weighted average basic common shares | 31,015,658 |  |  | 24,884,103 |  |  | 28,680,596 |  |  | 24,312,330 |
Effect of dilutive securities (1) | — |  |  | — |  |  | — |  |  | — |
Weighted average diluted common shares | 31,015,658 |  |  | 24,884,103 |  |  | 28,680,596 |  |  | 24,312,330 |
Basic loss per share | $ | (0.38 | ) |  | $ | (0.29 | ) |  | $ | (1.41 | ) |  | $ | (0.94 | )
Diluted loss per share (1) | $ | (0.38 | ) |  | $ | (0.29 | ) |  | $ | (1.41 | ) |  | $ | (0.94 | )
(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, 2015
July 2016 Offering - Series A Warrants | 7,680,000 |  |  | — |
July 2016 Offering - Series B Warrants | 4,926,000 |  |  | — |
July 2014 Offering - NRG Warrants | 166,666 |  |  | 166,666 |
Outstanding options to purchase common stock | 247,776 |  |  | 254,124 |
Total potentially dilutive securities | 13,020,442 |  |  | 420,790 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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