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 6 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Net (loss) income from continuing operations $ (5,687) $ 343 $ (15,154) $ (1,677)
Net income (loss) from discontinued operations 119 (558) 119 (523)
Net income (loss) $ (5,568) $ (215) $ (15,035) $ (2,200)
Weighted average shares used in computing net loss per share-basic 32,806 32,584 32,902 32,547
Effect of dilutive shares:        
Dilutive potential common shares            
Weighted average shares used in computing net loss per share-diluted 32,806 32,584 32,902 32,547
Net loss per share-basic:        
(Loss) income from continuing operations $ (0.17) $ 0.01 $ (0.46) $ (0.05)
Income (loss) from discontinued operations $ 0.00 $ (0.02) $ 0.00 $ (0.02)
Net loss per share-basic $ (0.17) $ (0.01) $ (0.46) $ (0.07)
Net loss per share-diluted:        
(Loss) income from continuing operations $ (0.17) $ 0.01 $ (0.46) $ (0.05)
Income (loss) from discontinued operations $ 0.00 $ (0.02) $ 0.00 $ (0.02)
Net loss per share-diluted $ (0.17) $ (0.01) $ (0.46) $ (0.07)
Stock Options [Member]
       
Effect of dilutive shares:        
Dilutive potential common shares            
Restricted Stock Units [Member]
       
Effect of dilutive shares:        
Dilutive potential common shares