Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.4.0.3
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Income Tax Disclosure [Abstract]    
Income tax provision (benefit) $ 254 $ 147