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Revenue (Details) - USD ($)
3 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Jul. 31, 2022
Revenue from Contract with Customer [Abstract]      
Allowance for doubtful accounts $ 0   $ 0
Contract costs, current 14,600,000   14,800,000
Contract costs, noncurrent 26,800,000   $ 29,400,000
Amortization of contract costs 4,490,000 $ 3,001,000  
Contract with customer, liability, revenue recognized 81,900,000    
Remaining performance obligation, amount $ 1,100,000,000