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Net Income Per Common Share - Additional Information (Detail)
3 Months Ended
May 02, 2015
May 03, 2014
Equity [Abstract]    
Number of common equivalent shares 76,200us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 75,600us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount