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 aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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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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Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property and Equipment
Total property and equipment	$ 4,323	$ 4,967
Accumulated depreciation	(1,618)	(1,580)
Property and equipment, net	2,705	3,387
Depreciation and amortization expense	562	645	$ 490
Computers and software
Property and Equipment
Total property and equipment	$ 480	752
Computers and software \| Minimum
Property and Equipment
Estimated useful life	P3Y
Computers and software \| Maximum
Property and Equipment
Estimated useful life	P5Y
Office equipment and furniture
Property and Equipment
Estimated useful life	P5Y
Total property and equipment	$ 706	832
Manufacturing equipment
Property and Equipment
Estimated useful life	P5Y
Total property and equipment	$ 10	242
Leasehold improvements
Property and Equipment
Estimated useful life	P10Y
Total property and equipment	$ 3,082	3,082
Leased Assets
Property and Equipment
Estimated useful life	P5Y
Total property and equipment	$ 45	$ 59