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Out-Licensing Agreements - Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Contract Liabilities:    
Balance at Beginning of Period $ 31,811  
Balance at End of Period 31,811 $ 31,811
Collaboration Agreements    
Contract Liabilities:    
Balance at Beginning of Period 31,811 12,261
Additions   25,000
Revenue Recognized   (5,450)
Balance at End of Period   31,811
Huadong ARCALYST    
Contract Liabilities:    
Balance at Beginning of Period 31,811 12,000
Additions   20,000
Revenue Recognized 0 (189)
Balance at End of Period $ 31,811 31,811
Genentech vixarelimab    
Contract Liabilities:    
Balance at Beginning of Period   261
Additions   5,000
Revenue Recognized   $ (5,261)