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Property and Equipment (Details) - Schedule of Property and Equipment - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Property and Equipment [Line Items]
Property and Equipment, Gross	$ 222	$ 222	$ 229
Accumulated depreciation and amortization	(215)	(212)	(204)
Property and equipment, net	7	10	25
Computer Equipment
Schedule of Property and Equipment [Line Items]
Property and Equipment, Gross	$ 39	$ 39	39
Estimated Life	3 years	3 years
Lab Equipment
Schedule of Property and Equipment [Line Items]
Property and Equipment, Gross	$ 130	$ 130	130
Estimated Life	5 years	5 years
Furniture and Fixtures
Schedule of Property and Equipment [Line Items]
Property and Equipment, Gross	$ 37	$ 37	44
Estimated Life	5 years	5 years
Computer Software
Schedule of Property and Equipment [Line Items]
Property and Equipment, Gross	$ 16	$ 16	$ 16
Estimated Life	3 years	3 years

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- 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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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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