Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail)

v3.5.0.2
Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Earnings Per Share [Abstract]        
Net loss $ (26,884) $ (5,027) $ (35,791) $ (14,852)
Weighted average shares used in computing net loss per share - basic and diluted 35,115 33,350 34,739 33,339
Net loss per share:        
Basic $ (0.77) $ (0.16) $ (1.03) $ (0.45)
Diluted $ (0.77) $ (0.16) $ (1.03) $ (0.45)