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Selected Balance Sheet Information - Schedule of Property and equipment, net (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Selected Balance Sheet Information    
Property, Plant and Equipment, Gross Total $ 1,424,000 $ 1,210,000
Less: accumulated depreciation and amortization (1,002,000) (865,000)
Total property and equipment, net 422,000 345,000
Depreciation 135,000 85,000
Computers and office equipment    
Selected Balance Sheet Information    
Property, Plant and Equipment, Gross Total 902,000 897,000
Other property, plant and equipment    
Selected Balance Sheet Information    
Property, Plant and Equipment, Gross Total 417,000 208,000
Leasehold improvements    
Selected Balance Sheet Information    
Property, Plant and Equipment, Gross Total 94,000 94,000
Software    
Selected Balance Sheet Information    
Property, Plant and Equipment, Gross Total $ 11,000 $ 11,000