Stock-Based Compensation Expense and Shareholders' Equity (Details 2) $ in Thousands	12 Months Ended
	Jul. 31, 2020 USD ($)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Expense (in thousands)	$ 205,911
Restricted stock units RSUs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Expense (in thousands)	$ 675
Weighted Average Expected Recognition Period (in years)	8 months 12 days
Stock Awards
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Expense (in thousands)	$ 205,236
Weighted Average Expected Recognition Period (in years)	2 years 4 months 24 days