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Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 3,015 $ 2,961
Less accumulated depreciation and amortization (2,750) (2,640)
Property and equipment, net 265 321
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,838 1,838
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 664 602
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 292 304
Office Furniture And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 216 217
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 5