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Stock Based Compensation (Detail) (USD $)
Share data in Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Allocated Share-based Compensation Expense $ 60,000 $ 61,000 $ 128,000 $ 170,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 700,000   700,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     2 years 109 days  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) 20.6   20.6  
Share-based Compensation Arrangement by Share-based Payment Award Granted (in Shares)     5.4  
Share-based Compensation Arrangement by Share-based Payment Award Shares Outstanding Vested And Exercisable (in Shares) 4.3   4.3  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) 2.1   2.1  
Intrinsic Value Of Stock Awards Outstanding 1,300,000   1,300,000  
Intrinsic Value Of Stock Awards Exercisable $ 256,000   $ 256,000