Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share - Anti-Dilutive Effect Due to Net Loss (Detail)

v2.4.0.8
Net Income (Loss) Per Share - Anti-Dilutive Effect Due to Net Loss (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total shares excluded from calculation of diluted loss per share 782 521 849 533
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total shares excluded from calculation of diluted loss per share 376 45 366 48
Restricted Stock Units [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total shares excluded from calculation of diluted loss per share 406 476 483 485