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Summary of Significant Accounting Policies (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) segment | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Summary of Significant Accounting Policies |  |  |  |  |
Allowance for doubtful accounts on grants receivable | $ 0 |  | $ 0 |  |
Grant income | 4,293 | $ 7,684 | 16,516 | $ 18,035 |
Deferred grant income, current | 1,117 | 1,701 | 1,117 | 1,701 | $ 1,701
Deferred grant income, noncurrent | 0 | $ 0 | $ 0 | $ 0 |
Expected dividend yield |  |  | 0.00% | 0.00% |
Number of operating segments | segment |  |  | 1 |  |
Unrecognized income tax | $ 0 |  | $ 0 |  | $ 0

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