BALANCE SHEET COMPONENTS - Accrued Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Income taxes payable	$ 9,651	$ 20,863
Accrued professional services	2,996	5,838
Other	16,150	4,981
Total accrued expenses and other current liabilities	28,797	$ 31,682
Income taxes paid	$ 18,000