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BALANCE SHEET COMPONENTS - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment—gross	$ 212,904	$ 146,973
Less accumulated depreciation and amortization	(127,793)	(88,901)
Total property and equipment—net	85,111	58,072
Depreciation	$ 43,700	36,200	$ 26,400
Computer, production, engineering and other equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Life (In months)	36 months
Total property and equipment—gross	$ 131,805	85,280
Demonstration units
Property, Plant and Equipment [Line Items]
Estimated Useful Life (In months)	12 months
Total property and equipment—gross	$ 53,547	46,387
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment—gross	$ 19,916	10,562
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated Useful Life (In months)	60 months
Total property and equipment—gross	$ 7,636	$ 4,744

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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