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Description of Business and Summary of Significant Accounting Policies (Details Textual)		9 Months Ended
	Aug. 01, 2018 USD ($)	Apr. 30, 2019 USD ($)	Jul. 31, 2018 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			59.50%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			40.50%
Cumulative Effect on Retained Earnings, Net of Tax	$ 23,000,000.0
Contract with Customer, Asset, Net		$ 8,124,000	$ 11,840,000
Capitalized Contract Cost, Gross		1,353,000
Capitalized Contract Cost, Amortization		(5,023,000)
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss)		(46,000)
Contract with Customer, Liability		$ 0
Tax benefits realized upon ultimate settlement, Description		The second step is to measure the tax position as the largest amount that is more than 50% likely to be realized upon ultimate settlement.
Capitalized software costs		$ 36,700,000	30,700,000
Accumulated amortization expense		$ 21,300,000	$ 16,000,000.0
Number of operating segments		2
Number of reportable segment		2

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