Revenue (Textual) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Disaggregation of Revenue [Line Items]
Unbilled accounts receivable, net	$ 84,228,000	$ 46,103,000
Contract with Customer, Asset, Allowance for Credit Loss	0	0
Contract costs	9,588,000	7,015,000
Noncurrent contract cost	25,221,000	23,375,000
Contract cost, amortization	9,900,000	$ 5,500,000
Contract with customer, liability, revenue recognized	102,700,000
Remaining performance obligation, amount	587,900,000
License
Disaggregation of Revenue [Line Items]
Unbilled accounts receivable, net	30,300,000
Ten Year License
Disaggregation of Revenue [Line Items]
Unbilled accounts receivable, net	$ 8,500,000
Ten Year License | Unbilled Accounts Receivable [Member] | Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	10.00%	10.00%