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Fair Value Measurements (Tables)
 3 Months Ended
Oct. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of 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 October 31, 2021 and July 31, 2021:
 October 31, 2021July 31, 2021Fair Value Hierarchy
Assets:
Trading securities$18,543 $20,135 Level 1
Foreign exchange contracts141 150 Level 2
Liabilities:
Foreign exchange contracts124 51 Level 2