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
3 Months Ended
Jan. 31, 2017
Jan. 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, Expired (11,189)  
Ending Balance 3,897,558  
Number of Options, Vested and Exercisable 1,800,252  
Weighted-Average Exercise Price, Outstanding, Beginning $ 13.31  
Weighted-Average Exercise Price, Granted 7.71  
Weighted-Average Exercise Price, Exercised  
Weighted-Average Exercise Price, Expired 17.88  
Weighted-Average Exercise Price, Outstanding, Ending 12.50  
Weighted-Average Exercise Price, Vested and Exercisable $ 13.46