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Commitments and Contingencies (Details) - USD ($)
1 Months Ended 12 Months Ended
Nov. 04, 2021
Jun. 02, 2021
Aug. 07, 2020
Nov. 30, 2020
Jan. 31, 2020
Nov. 30, 2019
Dec. 31, 2021
MorphoSys | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement              
Long-term Purchase Commitment [Line Items]              
Maximum milestone payment   $ 150,000,000          
Payment of capital   $ 350,000,000          
Payment of capital term   1 year          
Expected return (as a percent)   220.00%          
Maximum commitment to fund collaborative arrangement   $ 150,000,000         $ 150,000,000
Period of return   9 years          
Period of return start date   2 years          
Funding Agreement With Biohaven Pharmaceuticals              
Long-term Purchase Commitment [Line Items]              
Purchase commitment, purchase of committed, non-contingent Commercial Launch Preferred Equity payable     $ 200,000,000        
Remaining commitment             $ 129,600,000
Purchase Of Eisai Royalties              
Long-term Purchase Commitment [Line Items]              
Payment for purchase of royalties           $ 330,000,000  
Purchase commitment, upfront payment         $ 110,000,000    
Purchase commitment, additional payments $ 110,000,000     $ 110,000,000 $ 220,000,000