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Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Aug. 03, 2013
Jul. 28, 2012
Aug. 03, 2013
Jul. 28, 2012
Jan. 31, 2013
Income Tax Disclosure [Abstract]          
Income tax expense on income $ 331,000 $ 187,000 $ 11,000 $ 43,000  
Expense included in income tax       312,000  
Pretax income and benefit       269,000  
Cumulative unrecognized tax benefits $ 939,000   $ 939,000   $ 941,000