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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 |

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