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Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 28, 2013
Apr. 29, 2012
Schedule of Accrued Liabilities [Line Items]    
compensation, commissions and related benefits $ 9,831 $ 7,293
interest 111 147
other 1,887 1,881
accrued expenses $ 11,829 $ 9,321