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Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, plant and equipment
Property, plant and equipment, gross	$ 415	$ 425
Less: accumulated depreciation and amortization	(383)	(361)
Property, Plant and Equipment, Net	32	64
Leasehold improvements
Property, plant and equipment
Property, plant and equipment, gross	$ 6	6
Leasehold improvements | Minimum
Property, plant and equipment
Lives in years	2 years
Leasehold improvements | Maximum
Property, plant and equipment
Lives in years	15 years
Office equipment and furniture
Property, plant and equipment
Property, plant and equipment, gross	$ 409	$ 419
Office equipment and furniture | Minimum
Property, plant and equipment
Lives in years	3 years
Office equipment and furniture | Maximum
Property, plant and equipment
Lives in years	5 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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+ 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.

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