Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation - Summary of Changes in Stock Option Plan (Details)

v3.7.0.1
Share Based Compensation - Summary of Changes in Stock Option Plan (Details) - $ / shares
9 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Beginning Balance 3,351,795  
Number of Options, Granted 556,952 1,385,000
Number of Options, Exercised  
Number of Options, Cancelled (4,000)  
Number of Options, Expired (11,189)  
Ending Balance 3,893,558  
Number of Options, Vested and Exercisable 2,795,826  
Weighted-Average Exercise Price, Outstanding, Beginning $ 13.31  
Weighted-Average Exercise Price, Granted 7.71  
Weighted-Average Exercise Price, Exercised  
Weighted-Average Exercise Price, Cancelled 3.42  
Weighted-Average Exercise Price, Expired 17.88  
Weighted-Average Exercise Price, Outstanding, Ending 12.51  
Weighted-Average Exercise Price, Vested and Exercisable $ 13.05