Shareholders' Equity - Summary of Stock Option Activity (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Jan. 31, 2016 |
Jan. 31, 2015 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Total intrinsic value of stock options exercised | $ 253 | $ 72 |
| Total fair value of stock options vested | $ 0 | $ 0 |