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Loss Per Share - Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation (Details) - shares | 6 Months Ended
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Apr. 30, 2019 | Apr. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |
Potentially dilutive securities excluded from diluted loss per share calculation |  | 2,701,332 | 2,686,963
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 |  | 964,114 | 964,114
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 |  |  | 640,000
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 |  | 24,945 | 27,324
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 |  | 32,659 | 98,788
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 |  | 212,034 | 258,737
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] | 313,589 | 658,899
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] | 1,114,890 |
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 |  | 37,837 | 37,837
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 |  | 1,264 | 1,264
[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 April 30, 2019 of $1.6 million divided by the reduced conversion price of $5.16 and the liquidation preference of $14.5 million divided by the conversion price of $22.08 as of April 30, 2018. 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 April 30, 2019 of $18.5 million divided by the conversion price of $16.56. 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.

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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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- 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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