Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property and Equipment, Net
Total	$ 5,540	$ 5,485
Less: accumulated depreciation	(3,550)	(2,696)
Total property and equipment, net	1,990	2,789
Depreciation expense related to property and equipment	886	3,087	$ 4,228
Disposal of assets during the period, cost	111	9,528
Disposal of assets during the period, accumulated depreciation	58	9,490
Leasehold improvements
Property and Equipment, Net
Total	3,047	3,009
Computer hardware
Property and Equipment, Net
Total	1,120	1,045
Furniture and fixtures
Property and Equipment, Net
Total	452	539
Computer software
Property and Equipment, Net
Total	830	800
Office equipment
Property and Equipment, Net
Total	$ 91	$ 92

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 of decrease in accumulated depreciation, depletion and amortization as a result of sale or disposal of property, plant and equipment.

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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 of divestiture of long-lived, 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, furniture and fixtures, and computer 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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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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