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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 28, 2012
Apr. 29, 2012
Oct. 30, 2011
Schedule of Inventory [Line Items]      
Raw materials $ 5,884 $ 5,534  
Work-in-process 2,789 3,631  
Finished goods 29,588 27,208  
Inventories $ 38,261 $ 36,373 [1] $ 33,776
[1] Derived from audited financial statements.