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BALANCE SHEET COMPONENTS - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2017	Jul. 31, 2017
Finite-lived intangible assets:
Finite-lived intangible assets, gross	$ 28,230	$ 12,130
Total intangible assets, gross	28,230	28,230
Less:
Accumulated amortization	(3,335)	(2,229)
Intangible assets, net	24,895	26,001	[1]
In-process R&D
Indefinite-lived intangible asset:
In-process R&D	0	16,100
Developed technology
Finite-lived intangible assets:
Finite-lived intangible assets, gross	23,400	7,300
Less:
Accumulated amortization	$ (2,209)	(1,314)
Developed technology | Minimum
Less:
Estimated life (in years)	5 years
Customer relationships
Finite-lived intangible assets:
Finite-lived intangible assets, gross	$ 4,830	4,830
Less:
Accumulated amortization	$ (1,126)	$ (915)
[1] See Note 3 for a summary of adjustments related to the adoption of the new revenue recognition standard.

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