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INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jul. 31, 2018 | Jul. 31, 2017
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Deferred tax assets: |  |
Net operating loss carryforward | $ 162,914 | $ 135,929
Deferred revenue | 27,577 | 2,378
Tax credit carryforward | 47,839 | 13,100
Property and equipment | 0 | 1,118
Accruals and reserves | 8,370 | 7,427
Stock-based compensation expense | 21,252 | 27,512
Total deferred tax assets | 267,952 | 187,464
Deferred tax liabilities: |  |
Deferred commission expense | (27,829) | (22,535)
Goodwill and intangible assets | (5,909) | (483)
Property and equipment | (3,870) | 0
Other | (497) | (75)
Total deferred tax liabilities | (38,105) | (23,093)
Valuation allowance | (226,987) | (161,195)
Net deferred tax assets | $ 2,860 | $ 3,176

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