INCOME TAXES - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2020	Jul. 31, 2019
Deferred tax assets:
Accruals and reserves	$ 8,563	$ 21,297
Tax basis in excess of financial basis of investments in affiliates	0	6,534
Tax basis in excess of financial basis for intangible and fixed assets	225	187
Net operating loss and capital loss carry forwards	468,132	469,735
Total gross deferred tax assets	476,920	497,753
Less: valuation allowance	(452,969)	(451,189)
Net deferred tax assets	23,951	46,564
Deferred tax liabilities:
Financial basis in excess of tax basis for intangible and fixed assets	(22,889)	(43,885)
Convertible debt	(1,595)	(1,761)
Total gross deferred tax liabilities	(24,484)	(45,646)
Net deferred tax liabilities	$ (533)
Net deferred tax asset		$ 918