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Revenue Recognition (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2020
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 2,559     $ 2,782
Contract with Customer, Liability, Revenue Recognized $ 1,251      
Forecast [Member]        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Revenue, Remaining Performance Obligation, Percentage   28.00% 41.00%