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Inventories (Detail) - USD ($)
$ in Thousands
Jul. 31, 2016
May 01, 2016
Aug. 02, 2015
Inventory Disclosure [Abstract]      
Raw materials $ 6,779 $ 5,462 $ 6,944
Work-in-process 3,224 2,972 3,018
Finished goods 38,128 38,097 36,582
Inventories $ 48,131 $ 46,531 [1] $ 46,544
[1] Derived from audited financial statements.