Annual report pursuant to Section 13 and 15(d)

Severance and Other Restructuring Costs - Change in Severance Liability (Detail)

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Severance and Other Restructuring Costs - Change in Severance Liability (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2014
Restructuring And Related Activities [Abstract]  
Accrual balance as of January 31, 2013 $ 330
Severance charges accrued 880
Severance costs paid (1,005)
Accrual balance as of January 31, 2014 $ 205