INCOME TAXES - Additional Information (Detail)	9 Months Ended
	Apr. 30, 2020 USD ($) day	Jul. 31, 2019 USD ($)
Income Taxes [Line Items]
Unrecognized tax benefits related to federal, state and foreign taxes	$ 2,000,000	$ 2,400,000
Deferred employer-paid portion of social security taxes	4,000,000
Liabilities for interest expense related to uncertain tax positions	200,000	200,000
Income tax penalties accrued	200,000
Expected any unrecognized tax benefits to reverse in the next twelve months	$ 0
Stockholder owning ownership on corporation's securities percentage	5.00%
Stockholder owning ownership on corporation's securities rolling period	3 years
Net operating loss carryforwards for federal tax		2,100,000,000
Net operating loss carryforwards for state tax		$ 160,000,000
Number of business days | day	10
Minimum
Income Taxes [Line Items]
Percentage of ownership require to obtain approval from board of directors to acquiring shares of the company's securities	4.99%