Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,000	$ 1,956
Less: accumulated depreciation and amortization	1,662	(1,614)
Property and equipment, net	338	342
Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,675	1,631
Finance Lease Right-of-use Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	194	194
Computer And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 131	$ 131