Property Plant and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Property and Equipment
Property and equipment, gross	$ 7,519	$ 8,238
Less accumulated depreciation and amortization	(5,226)	(4,235)
Property and equipment, net	$ 2,293	4,003
Furniture and fixtures, lab and office equipment
Property and Equipment
Estimated useful life (in years)	5 years
Property and equipment, gross	$ 1,262	1,262
Computer equipment and software
Property and Equipment
Estimated useful life (in years)	3 years
Property and equipment, gross	$ 2,726	3,445
Manufacturing equipment
Property and Equipment
Estimated useful life (in years)	10 years
Property and equipment, gross	$ 1,616	1,616
Leasehold improvements
Property and Equipment
Property and equipment, gross	1,915	1,915
Construction in progress
Property and Equipment
Property and equipment, gross	$ 0	$ 0

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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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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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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