Condensed Consolidated Balance Sheet Components - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 45,087	$ 26,733
Less: accumulated depreciation and amortization	(14,769)	(10,697)
Property and equipment, net	30,318	16,036
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,470	15,676
Computer hardware
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,237	1,939
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,888	6,766
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,423	1,347
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	656	656
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,413	$ 349

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 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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