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Fair Value of Derivatives as Defined by Accounting Standard (Detail) - USD ($)
$ in Thousands
Jul. 31, 2016
Aug. 02, 2015
Derivatives, Fair Value [Line Items]    
Cash flow hedge foreign currency forward contracts - Other Current Assets $ 309 $ 610
Cash flow hedge foreign currency forward contracts - Other Current Liabilities (695)  
Total, net (386) 610
Foreign currency forward contracts - Other Current Assets 9 79
Foreign currency forward contracts - Other Current liabilities 0 0
Total, net $ 9 $ 79