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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 28, 2013
Apr. 28, 2013
Jul. 29, 2012
Inventory [Line Items]      
Raw materials $ 5,960 $ 5,311  
Work-in-process 2,228 2,539  
Finished goods 33,582 30,568  
Inventories $ 41,770 $ 38,418 [1] $ 44,052
[1] Derived from audited financial statements.