Selected Balance Sheet Information - Schedule of Property and equipment, net (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Selected Balance Sheet Information
Property, Plant and Equipment, Gross Total	$ 1,221	$ 1,210
Less: accumulated depreciation and amortization	(897)	(865)
Total	324	345
Computers and office equipment
Selected Balance Sheet Information
Property, Plant and Equipment, Gross Total	905	897
Other Property, Plant and Equipment
Selected Balance Sheet Information
Property, Plant and Equipment, Gross Total	210	208
Leasehold improvements
Selected Balance Sheet Information
Property, Plant and Equipment, Gross Total	94	94
Software
Selected Balance Sheet Information
Property, Plant and Equipment, Gross Total	$ 12	$ 11

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 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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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.

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