Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation - Summary of RSU Activity and Related Information (Details)

v3.7.0.1
Share Based Compensation - Summary of RSU Activity and Related Information (Details) - $ / shares
9 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Beginning Balance 3,351,795  
Number of RSUs, Granted 556,952 1,385,000
Number of RSUs, Vested  
Ending Balance 3,893,558  
Weighted-Average Exercise Price, Outstanding, Beginning $ 13.31  
Weighted-Average Exercise Price, Granted 7.71  
Weighted-Average Exercise Price, Vested  
Weighted-Average Exercise Price, Outstanding, Ending $ 12.51  
Restricted Stock Units (RSUs) [Member]    
Beginning Balance 719,448  
Number of RSUs, Granted 1,579,934  
Number of RSUs, Vested (722,089)  
Number of RSUs, Cancelled (49,600)  
Ending Balance 1,527,693  
Weighted-Average Exercise Price, Outstanding, Beginning $ 10.77  
Weighted-Average Exercise Price, Granted 7.95  
Weighted-Average Exercise Price, Vested 9.03  
Weighted-Average Exercise Price, Cancelled 8.89  
Weighted-Average Exercise Price, Outstanding, Ending $ 8.73