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Description of Business and Summary of Significant Accounting Policies (Details Textual)
 3 Months Ended
Aug. 01, 2018
USD ($)
Oct. 31, 2018
USD ($)
Jul. 31, 2018
USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items]      
Cumulative Effect on Retained Earnings, Net of Tax $ 23,000,000    
Contract with Customer, Asset, Net   $ 9,990,000 $ 11,840,000
Capitalized Contract Cost, Amortization   (1,669,000)  
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss)   $ (181,000)  
Noncontrolling Interest, Ownership Percentage by Parent     59.50%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners     40.50%
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   $ 32,700,000 $ 30,700,000
Accumulated amortization expense   $ 16,300,000 $ 16,000,000
Number of operating segments   2  
Number of reportable segment   2  
Contract with Customer, Liability   $ 0