Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
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 9 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
Earnings Per Share [Abstract]        
Net loss $ (220) $ (8,082) $ (7,120) $ (43,873)
Weighted average shares used in computing net loss per share - basic and diluted 35,479 35,186 35,381 34,889
Net loss per share:        
Basic $ 0.00 $ (0.23) $ (0.20) $ (1.26)
Diluted $ 0.00 $ (0.23) $ (0.20) $ (1.26)