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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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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- Definition

The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.

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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.

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BALANCE SHEET COMPONENTS - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019	Jul. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 359,804		$ 359,804		$ 320,131
Less: accumulated depreciation	(216,374)		(216,374)		(183,169)
Total property and equipment, net	143,430		143,430		136,962
Impairment of leasehold	1,200
Depreciation and amortization			45,540	$ 35,005
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization	18,700	$ 14,500	$ 36,900	$ 26,900
Computer, production, engineering and other equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Life			36 months
Total property and equipment, gross	226,897		$ 226,897		200,762
Demonstration units
Property, Plant and Equipment [Line Items]
Estimated Useful Life			12 months
Total property and equipment, gross	64,190		$ 64,190		59,981
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	54,570		$ 54,570		46,520
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated Useful Life			60 months
Total property and equipment, gross	$ 14,147		$ 14,147		$ 12,868