Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.7.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Income Tax Disclosure [Abstract]    
Income tax provision (benefit) $ 269 $ 254