Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Property and Equipment
Total property and equipment	$ 4,334	$ 4,334
Accumulated depreciation	(2,493)	(2,081)
Property and equipment, net	1,841	2,253
Depreciation and amortization expense	428	477
Computers and software
Property and Equipment
Property and equipment, gross	$ 476	476
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
Property and equipment, gross	$ 721	721
Manufacturing equipment
Property and Equipment
Estimated useful life	P5Y
Property and equipment, gross	$ 10	10
Leasehold improvements
Property and Equipment
Estimated useful life	P10Y
Property and equipment, gross	$ 3,082	3,082
Leased assets
Property and Equipment
Estimated useful life	P5Y
Leased assets	$ 45	$ 45

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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