Other Income, Net (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
|
| Other Income And Expenses [Abstract] | ||
| Gain from disposal of property and equipment | $ 145 | $ 758 |
| Interest income | 48 | 272 |
| Currency exchange losses | (84) | (158) |
| Other | 41 | 169 |
| Total | $ 150 | $ 1,041 |