Loss Per Share - Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation (Details) - shares
 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Share-based compensation arrangement by share-based payment award, options, outstanding, number 327,890 214,383
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number 4,300,000  
Antidilutive securities excluded from computation of earnings per share, amount 29,138,703 10,516,990
Series C Warrants [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 11,569,364  
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 7,680,000
NRG 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   166,666
Unvested Restricted Stock Awards [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number 1,185,457 1,986,732
Series C Preferred Shares [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Convertible preferred stock, shares issued upon conversion [1] 7,906,783 0
Series B Cumulative Preferred Stock [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Convertible preferred stock, shares issued upon conversion 454,043 454,043
Series 1 Preferred Shares [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Convertible preferred stock, shares issued upon conversion 15,166 15,166
[1] The number of shares of common stock issuable upon conversion of the Series C Preferred Stock was calculated using the stated value outstanding on April 30, 2018 of $14.5 million (original stated value of $33.5 million less the stated value of conversions to date through April 30, 2018 totaling $19.0 million) divided by the conversion price of $1.84. 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.