Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Company's Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail)

v2.4.1.9
Income Taxes - Reconciliation of Company's Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]    
Balance at beginning of the period $ 795us-gaap_UnrecognizedTaxBenefits  
Increase due to a current year position 670us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 795us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Decrease due to a prior period position (51)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions  
Balance at the end of the period $ 1,414us-gaap_UnrecognizedTaxBenefits $ 795us-gaap_UnrecognizedTaxBenefits