Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Detail)

v3.5.0.2
Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 2,505 1,723 2,171 1,632
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 1,633 1,526 1,284 1,468
Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 827 179 845 152
Deferred Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 45 18 42 12