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Shareholders' Equity (Tables)
 12 Months Ended
Jul. 31, 2018
Shareholders' Equity [Abstract]  
Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are summarized in the following table.
 
  
July 31,
 
  
2018
  
2017
(Restated)
 
  
(in thousands)
 
       
Unrealized net foreign currency translation losses
 
$
(1,880
)
 
$
(1,810
)
Unrealized net investment (losses) gains on available for sale investments
  
(5
)
  
15
 
Total accumulated other comprehensive loss
 
$
(1,885
)
 
$
(1,795
)