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Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property and Equipment, Net
Property and equipment, gross	$ 226	$ 226
Less: accumulated depreciation	(190)	(161)
Property and equipment, net	36	65
Depreciation expense	29	34
Computer office equipment
Property and Equipment, Net
Property and equipment, gross	51	51
Leasehold improvements
Property and Equipment, Net
Property and equipment, gross	69	69
Lab equipment
Property and Equipment, Net
Property and equipment, gross	76	76
Furnitures and fixtures
Property and Equipment, Net
Property and equipment, gross	$ 30	$ 30

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- Definition

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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