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 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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No definition available.

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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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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	Sep. 30, 2019	Dec. 31, 2019
Property and Equipment, Net
Property and equipment, gross	$ 9,060		$ 9,060		$ 7,749
Less: Accumulated depreciation and amortization	(4,581)		(4,581)		(3,795)
Property and equipment, net	4,479		4,479		3,954
Depreciation expense	300	$ 200	800	$ 600
Machinery and equipment
Property and Equipment, Net
Property and equipment, gross	5,927		5,927		4,613
Construction in progress
Property and Equipment, Net
Property and equipment, gross	1,731		1,731		1,854
Computer and office equipment
Property and Equipment, Net
Property and equipment, gross	670		670		598
Leasehold improvements
Property and Equipment, Net
Property and equipment, gross	503		503		497
Furniture and fixtures
Property and Equipment, Net
Property and equipment, gross	$ 229		$ 229		$ 187