Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.3.1.900
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Oct. 31, 2014
Aug. 31, 2015
Income Taxes Disclosure [Line Items]          
Income tax benefit $ (1,228) $ (348) $ (1,003) $ (415)  
Federal [Member]          
Income Taxes Disclosure [Line Items]          
Net operating loss carryforwards         $ 37,100
Proposed operating loss carryforwards         $ 34,200