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Investment in MiNK Therapeutics, Inc. (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Jul. 31, 2025 | Jul. 17, 2025 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment in MiNK Therapeutics, Inc. | $ 30,482 | $ 30,482 |  |  | $ 0
MiNK Therapeutics, Inc. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage | 48.00% | 48.00% | 50.00% | 50.00% |
Percentage of Non-controlling interest | 0.00% | 0.00% |  |  | 45.00%
Recognized a gain on deconsolidation | $ 100,900 | $ 100,900 |  |  |
Fair value retained investment on deconsolidation |  |  | $ 50,600 |  |
Fair value of equity investment | 30,500 | 30,500 |  |  |
Equity method investment in MiNK Therapeutics, Inc. | $ 51,300 | $ 51,300 |  |  |
Investment percentage of asset balance | 20.00% | 20.00% |  |  |

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