Quarterly report pursuant to Section 13 or 15(d)

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

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Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Net loss from continuing operations $ (9,467) $ (2,020)
Net income from discontinued operations   35
Net loss $ (9,467) $ (1,985)
Weighted average shares used in computing net loss per share-basic 32,985 32,513
Effect of dilutive shares:    
Dilutive potential common shares 455 656
Weighted average shares used in computing net loss per share-diluted 33,440 33,169
Net loss per share-basic:    
Loss from continuing operations $ (0.29) $ (0.06)
Income from discontinued operations   $ 0.00
Net loss per share-basic $ (0.29) $ (0.06)
Net loss per share-diluted:    
Loss from continuing operations $ (0.29) $ (0.06)
Income from discontinued operations   $ 0.00
Net loss per share-diluted $ (0.29) $ (0.06)
Stock Options [Member]
   
Effect of dilutive shares:    
Stock options and Restricted stock units 277 186
Restricted Stock Units [Member]
   
Effect of dilutive shares:    
Stock options and Restricted stock units 178 470