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Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended
May 02, 2015
May 03, 2014
Jan. 31, 2015
Income Tax Disclosure [Abstract]      
Income tax expense $ 471,000us-gaap_IncomeTaxExpenseBenefit $ 449,000us-gaap_IncomeTaxExpenseBenefit  
Income tax expense (benefit) related to prior year's state taxes 135,000us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions 100,000us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions  
Cumulative unrecognized tax benefits 633,000us-gaap_UnrecognizedTaxBenefits   707,000us-gaap_UnrecognizedTaxBenefits
Developments affecting unrecognized tax benefits $ 0us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease