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Leases (Narrative) (Details) - USD ($)
6 Months Ended
Jan. 31, 2022
Jan. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Rent $ 5,985,000  
Executive Chairman    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Related party lease payments made 333,000 $ 329,000
Rent $ 685,000