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Acquisitions - BioElectron Acquisition (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Acquisitions      
Research and development $ 651,496 $ 540,684 $ 477,643
BioElectron | Maximum      
Acquisitions      
Development milestone payment obligations $ 200,000