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Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Major classifications of property and equipment and estimated useful lives
Property and equipment, gross	$ 1,374	$ 10,072
Accumulated depreciation and amortization	(991)	(9,328)
Property and equipment, net	383	744
Office furniture and equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, gross	66	5,410
Leasehold improvements
Major classifications of property and equipment and estimated useful lives
Property and equipment, gross	121	1,610
Vehicles
Major classifications of property and equipment and estimated useful lives
Property and equipment, gross	41	206
Manufacturing and test equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, gross	$ 1,146	$ 2,846
Minimum
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	2 years
Minimum | Office furniture and equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	3 years
Minimum | Leasehold improvements
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	2 years
Minimum | Vehicles
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	5 years
Minimum | Manufacturing and test equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	2 years
Maximum
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	10 years
Maximum | Office furniture and equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	10 years
Maximum | Leasehold improvements
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	7 years
Maximum | Vehicles
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	10 years
Maximum | Manufacturing and test equipment
Major classifications of property and equipment and estimated useful lives
Property and equipment, useful life (in years)	10 years

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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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.

+ References

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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.

+ References

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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.

+ References

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