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Liability Related to Sale of Future Royalties (Tables)
 6 Months Ended
Jun. 30, 2023
Liability Related to Sale of Future Royalties [Abstract]  
Liability Related to Sale of Future Royalties

The following is a summary of our liability related to sale of future royalties for the six months ended June 30, 2023 (in thousands):

Proceeds from sale of future royalties
  
$
500,000
  
Royalty payments to Royalty Pharma
    
(12,562
)
Interest expense related to sale of future royalties
    
32,915
  
Liability related to sale of future royalties as of June 30, 2023
    
520,353
  
Issuance costs related to sale of future royalties
    
(10,434
)
Amortization of issuance costs related to sale of future royalties as of June 30, 2023
    
255
  
Net liability related to sale of future royalties as of June 30, 2023
  
$
510,174