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Supplementary Balance Sheet Information - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 200	$ 500
Property and equipment	4,682	3,823
Less—accumulated depreciation	(3,413)	(3,441)
Property and equipment, net	1,269	382
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	1,066	955
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	2,560	1,962
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,056	$ 906

X

- Definition

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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