Description of Business and Summary of Significant Accounting Policies (Details Textual)	6 Months Ended
	Jan. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 10,574,000
Capitalized Contract Cost, Gross	100,000
Capitalized Contract Cost, Amortization	(1,748,000)
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss)	356,000
Contract with Customer, Asset, after Allowance for Credit Loss	9,282,000
Contract with Customer, Liability	0
Capitalized software costs	46,300,000	$ 39,400,000
Accumulated amortization expense	$ 28,500,000	$ 23,600,000
Number of operating segments	2
Number of reportable segment	2