Balance Sheet Components - Property (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Property and Equipment, net
Property and equipment, gross	$ 35,202	$ 26,500
Less: Accumulated depreciation and amortization	(16,106)	(13,790)
Total Property and Equipment, net	19,096	12,710
Impairment of assets	20
Proceeds from sale of impaired machinery and equipment	225
Machinery and equipment
Property and Equipment, net
Property and equipment, gross	20,949	20,670
Furniture and fixtures
Property and Equipment, net
Property and equipment, gross	$ 450	217
Useful Life	3 years
Computer equipment
Property and Equipment, net
Property and equipment, gross	$ 789	789
Useful Life	3 years
Capitalized Software Held for Internal Use
Property and Equipment, net
Property and equipment, gross	$ 1,871	1,159
Useful Life	3 years
Leasehold improvements
Property and Equipment, net
Property and equipment, gross	$ 1,687	1,686
Construction-in-process
Property and Equipment, net
Property and equipment, gross	$ 9,456	$ 1,979
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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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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