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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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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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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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 and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Property and Equipment, net
Property and equipment, gross	$ 75,916		$ 75,916	$ 64,807
Less: Accumulated depreciation and amortization	(47,667)		(47,667)	(41,524)
Total Property and Equipment, net	28,249		28,249	23,283
Depreciation expense			6,200
Impairment	0	$ 1,310
Machinery and equipment
Property and Equipment, net
Property and equipment, gross	47,158		47,158	36,414
Furniture and fixtures
Property and Equipment, net
Property and equipment, gross	1,376		$ 1,376	1,376
Useful Life			3 years
Computer equipment
Property and Equipment, net
Property and equipment, gross	2,025		$ 2,025	1,828
Useful Life			3 years
Capitalized software held for internal use
Property and Equipment, net
Property and equipment, gross	7,079		$ 7,079	5,917
Useful Life			3 years
Leasehold improvements
Property and Equipment, net
Property and equipment, gross	14,586		$ 14,586	11,556
Construction-in-process
Property and Equipment, net
Property and equipment, gross	$ 3,692		$ 3,692	$ 7,716
Minimum \| Machinery and equipment
Property and Equipment, net
Useful Life			3 years
Maximum \| Machinery and equipment
Property and Equipment, net
Useful Life			5 years