Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Net Loss Per Share - Anti-Dilutive Effect Due to Net Loss (Detail)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2013
Jul. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total shares excluded from calculation of diluted loss per share 681 534 707 507
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total shares excluded from calculation of diluted loss per share 192 53 213 50
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 489 481 494 457