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Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Revenue      
Revenues $ 156 $ 967  
Contract assets 0   $ 0
Contract liability 2,947   $ 3,058
Revenue, contract liabilities 200    
Contracts and grants      
Revenue      
Revenues 154 967  
Rockefeller University | Contracts and grants      
Revenue      
Revenues $ 200 $ 1,000