INCOME TAXES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Income Taxes [Line Items]
Net deferred tax assets	$ 23,951	$ 46,564
Deferred tax liability	533
Change in valuation allowance	$ 1,800	(12,700)
Ownership percentage	5.00%
Stockholder owning ownership on corporation's securities rolling period	3 years
Deferred employer-paid portion of social security taxes	$ 5,300
Unrecognized tax benefits, including interest, related to federal, state and foreign taxes	2,800	2,400
Expected any unrecognized tax benefits to reverse in the next twelve months	200
Increase (decrease) in liabilities for interest expense related to uncertain tax positions	100	200
Federal
Income Taxes [Line Items]
Operating loss carryforwards	2,100,000
State
Income Taxes [Line Items]
Operating loss carryforwards	117,000
Foreign
Income Taxes [Line Items]
Operating loss carryforwards	70,900
Foreign net operating loss carryforward with indefinite period	56,600
Federal and State
Income Taxes [Line Items]
Net capital loss carryforwards	48,500
Other Assets
Income Taxes [Line Items]
Net deferred tax assets	300	1,000
Other Long -term Liabilities
Income Taxes [Line Items]
Deferred tax liability	$ 800	$ 100