Balance Sheet Components - Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Property and Equipment, net
Property and equipment, gross	$ 71,410	$ 71,410	$ 64,807
Less: Accumulated depreciation and amortization	(45,485)	(45,485)	(41,524)
Total Property and Equipment, net	25,925	25,925	23,283
Depreciation expense		4,000
Impairment	0
Machinery and equipment
Property and Equipment, net
Property and equipment, gross	45,801	45,801	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	2,311	$ 2,311	1,828
Useful Life		3 years
Capitalized software held for internal use
Property and Equipment, net
Property and equipment, gross	6,578	$ 6,578	5,917
Useful Life		3 years
Leasehold improvements
Property and Equipment, net
Property and equipment, gross	12,968	$ 12,968	11,556
Construction-in-process
Property and Equipment, net
Property and equipment, gross	$ 2,376	$ 2,376	$ 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

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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