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Fair Value Measurements (Tables)
9 Months Ended
Apr. 30, 2021
Text Block [Abstract]  
Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis
The following table summarizes the Company's financial assets and liabilities that were accounted for at fair value on a recurring basis at April 30, 2021 and July 31, 2020:
 April 30, 2021July 31, 2020Fair Value Hierarchy
Assets:
Trading securities$20,169 $18,606 Level 1
Foreign exchange contracts724 594 Level 2
Liabilities:
Foreign exchange contracts252 777 Level 2