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Fair Value Measurements (Tables)
9 Months Ended
Apr. 30, 2019
Text Block [Abstract]  
Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis
 
Inputs
Considered As
 
 
 
 
 
Quoted Prices in Active Markets for Identical
Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Fair Values
 
Balance Sheet Classifications
April 30, 2019
 
 
 
 
 
 
 
Trading securities
$
15,890

 
$

 
$
15,890

 
Other assets
Foreign exchange contracts

 
532

 
532

 
Prepaid expenses and other current assets
Total Assets
$
15,890

 
$
532

 
$
16,422

 
 
Foreign exchange contracts
$

 
$
10

 
$
10

 
Other current liabilities
Total Liabilities
$

 
$
10

 
$
10

 
 
July 31, 2018
 
 
 
 
 
 
 
Trading securities
$
14,383

 
$

 
$
14,383

 
Other assets
Foreign exchange contracts

 
1,077

 
1,077

 
Prepaid expenses and other current assets
Total Assets
$
14,383

 
$
1,077

 
$
15,460

 
 
Foreign exchange contracts
$

 
$
3

 
$
3

 
Other current liabilities
Total Liabilities
$

 
$
3

 
$
3