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 gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of gain (loss) on termination of lease before expiration of lease term.

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Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Property and Equipment
Property and equipment. gross	$ 2,265		$ 2,265		$ 2,265
Less: accumulated depreciation and amortization	(2,265)		(2,265)		(2,200)
Property and equipment, net	0		0		65
Depreciation and amortization			65	$ 376
Gain (Loss) on Termination of Lease	0	$ (881)	0	(881)
Gain Loss On Sale Of Property Plant Equipment			0	(6,322)
Property and Equipment
Property and Equipment
Depreciation and amortization	100	$ 100	100	$ 100
Software
Property and Equipment
Property and equipment. gross	2,214		2,214		2,214
Computer and office equipment
Property and Equipment
Property and equipment. gross	$ 51		$ 51		$ 51