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Summary of Significant Accounting Policies - Concentration of Credit Risk and Significant Customers and Suppliers (Details) - Revenue - Customer concentration | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Combined Rockefeller University and Gilead Sciences |  |  |
Concentration risk |  |  |
Concentration risk (as a percent) |  |  | 88.00%
Rockefeller University |  |  |
Concentration risk |  |  |
Concentration risk (as a percent) | 95.00% | 75.00% |

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