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Shareholders' Equity (Tables)
 12 Months Ended
Jul. 31, 2017
Shareholders' Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are summarized in the following table.

  
Balance at July 31,
 
  
2017
  
2016
 
  
(in thousands)
 
       
Unrealized net foreign currency translation losses
 
$
(2,033
)
 
$
(2,176
)
Unrealized net investment gains on available for sale investments
  
15
   
33
 
Total accumulated other comprehensive loss
 
$
(2,018
)
 
$
(2,143
)