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Shareholders' Equity (Tables)
 9 Months Ended
Apr. 28, 2018
Shareholders' Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are summarized in the following table.

 
Balance at
 
 
April 28,
2018
  
July 31,
2017
 
 
(in thousands)
 
       
Unrealized net foreign currency translation losses
 
$
(1,912
)
 
$
(2,033
)
Unrealized net investment (losses) gains on available for sale investments
  
(11
)
  
15
 
Total accumulated other comprehensive loss
 
$
(1,923
)
 
$
(2,018
)