Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
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, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 2016
Earnings Per Share [Abstract]        
Net loss $ (1,529) $ (26,884) $ (6,900) $ (35,791)
Weighted average shares used in computing net loss per share - basic and diluted 35,351 35,115 35,331 34,739
Net loss per share:        
Basic $ (0.05) $ (0.77) $ (0.20) $ (1.03)
Diluted $ (0.05) $ (0.77) $ (0.20) $ (1.03)