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Related Party Transactions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Related Party Transactions    
Research and development expenses $ 265,554 $ 137,676
Related party    
Related Party Transactions    
Research and development expenses $ 912 1,519
Related party | Foresite labs    
Related Party Transactions    
Automatic renewal term 1 year  
Research and development expenses $ 900 1,500
Research and development accrued expenses $ 0 $ 2