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Commitments and Contingencies - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended
Jan. 31, 2014
May 03, 2014
May 04, 2013
Commitments And Contingencies Disclosure [Abstract]      
Estimated costs associated with the replacement program     $ 672,000
Replacement costs charged against the reserve   221,000  
Other Accrued Expenses   451,000  
Cash received from supplier for recovery $ 450,000    
Period of receiving lower product prices   3 years