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License and Collaboration Revenue and Other Funding Agreements (Tables)
 9 Months Ended
Sep. 30, 2025
License and Collaboration Revenue and Other Funding Agreements [Abstract]  
Reconciliation of Contract Asset assets and Unbilled Receivables

A reconciliation of the closing balance of the contract assets and unbilled receivables associated with the Viatris License Agreement is as follows as of September 30, 2025 and 2024 (in thousands):


   
Nine Months Ended
September 30,
  
    2025     2024
 
Contract assets and unbilled receivables
  
   
 
Balance as of beginning of nine-month period
  
$
2,209
     $ 1,407  
Revenue recognized
    
10,331
       6,690  
Reclassification to Accounts receivable related to costs billed under the Viatris License Agreement
    
(11,176
)
     (6,629 )
Balance as of end of nine-month period
  
$
1,364
     $ 1,468