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INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2018 | Apr. 30, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
U.S. federal income tax at statutory rate |  |  |  |  |  |  |  |  | $ (75,779) | $ (127,427) | $ (36,011)
U.S. tax reform impact |  |  |  |  |  |  |  |  | 93,352 | 0 | 0
Change in valuation allowance |  |  |  |  |  |  |  |  | 25,274 | 86,941 | 19,268
Effect of foreign operations |  |  |  |  |  |  |  |  | 26,117 | 16,891 | 15,144
Stock-based compensation |  |  |  |  |  |  |  |  | (73,631) | 6,701 | 3,655
Warrant revaluation |  |  |  |  |  |  |  |  | 0 | 7,185 | (681)
Non-deductible expenses |  |  |  |  |  |  |  |  | 2,115 | 1,693 | 802
State income taxes |  |  |  |  |  |  |  |  | (290) | 206 | 140
Transfer pricing adjustments |  |  |  |  |  |  |  |  | 4,584 | 11,822 | 0
Intangible asset migration |  |  |  |  |  |  |  |  | 4,461 | 0 | 0
Other |  |  |  |  |  |  |  |  | 1,244 | 840 | 0
Total | $ 4,118 | $ (843) | $ 1,913 | $ 2,259 | $ 1,555 | $ 2,639 | $ 547 | $ 111 | $ 7,447 | $ 4,852 | $ 2,317

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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