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Certain Balance Sheet Accounts - Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total cost	$ 9,294		$ 8,090
Less accumulated depreciation and amortization	(5,507)		(4,245)
Total property and equipment, net	3,787		3,845
Depreciation and amortization	1,262	$ 654
Finance leases
Property, Plant and Equipment [Line Items]
Total cost	4,920		4,034
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total cost	2,828		2,569
Computer equipment
Property, Plant and Equipment [Line Items]
Total cost	921		862
Office Equipment and Furniture [Member
Property, Plant and Equipment [Line Items]
Total cost	$ 625		$ 625

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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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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