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Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 28, 2012
Apr. 29, 2012
Oct. 30, 2011
Schedule of Accrued Liabilities [Line Items]      
Compensation, commissions and related benefits $ 7,775 $ 7,293  
Interest 112 147  
Other accrued expenses 2,724 1,881  
Accrued expenses $ 10,611 $ 9,321 [1] $ 6,839
[1] Derived from audited financial statements.