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Revenues - Schedule of revenue disaggregated by revenue source (Details) - USD ($)
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]    
Revenue $ 174,000 $ 162,000
Research and development agreements [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 169,000 162,000
Royalties on product sales [Member]    
Disaggregation of Revenue [Line Items]    
Revenue $ 5,000 $ 0