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)

v3.2.0.727
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, 2015
Jul. 31, 2014
Jul. 31, 2015
Jul. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 1,723 509 1,632 560
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 1,526 297 1,468 344
Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 179 207 152 214
Deferred Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 18 5 12 2