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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Additions made to capitalized computer software costs during the period.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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.

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Equipment, Software and Leasehold Improvements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Equipment, Software and Leasehold Improvements, Net [Abstract]
Equipment, software and leasehold improvements	$ 5,734		$ 5,734		$ 5,432
Accumulated depreciation	(4,943)		(4,943)		(4,816)
Equipment, software and leasehold improvements, net	791		791		616
Depreciation expense	71	$ 70	147	$ 178
Computer and Equipment [Member]
Equipment, Software and Leasehold Improvements, Net [Abstract]
Equipment, software and leasehold improvements	2,226		2,226		2,229
Software [Member]
Equipment, Software and Leasehold Improvements, Net [Abstract]
Equipment, software and leasehold improvements	2,010		2,010		1,695
Capitalization of internal-use software cost	165		315
Leasehold Improvements [Member]
Equipment, Software and Leasehold Improvements, Net [Abstract]
Equipment, software and leasehold improvements	659		659		660
Furniture and Fixtures [Member]
Equipment, Software and Leasehold Improvements, Net [Abstract]
Equipment, software and leasehold improvements	$ 839		$ 839		$ 848