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License and Acquisition Agreements - MedImmune License Agreement (Details) - USD ($) $ in Thousands		12 Months Ended
	May 22, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
License and Acquisition Agreements
Research and development		$ 96,853	$ 111,623	$ 76,097
MedImmune | License agreement
License and Acquisition Agreements
Research and development	$ 0	$ 0	$ 0	$ 0

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