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Royalty Financing Obligations (Tables)
12 Months Ended
Dec. 31, 2023
Advance Royalties [Abstract]  
Schedule of Royalty Financing Obligations
The following table shows the activity within the Royalty financing obligations account (in thousands) as well as the effective interest rate as of December 31, 2023:
 2020 RPI Royalty Agreement2021 RPI Royalty AgreementOMERS Royalty AgreementTotal
Balance as of December 31, 2020$124,717$$$124,717 
2021 Royalty sale: Royalty financing obligations, net of issuance costs150,833147,309298,142 
Non-cash Interest expense on Royalty financing obligations33,3082,8971,46537,670 
Royalty revenues paid and payable(10,801)(353)(11,154)
Balance as of December 31, 2021$147,224$153,377$148,774$449,375 
Deferred financing costs— (34)— (34)
Non-cash Interest expense on Royalty financing obligations39,994 22,239 14,249 76,482 
Royalty revenues paid and payable(22,237)(1,931)— (24,168)
Balance as of December 31, 2022$164,981 $173,651 $163,023 $501,655 
Non-cash Interest expense on Royalty financing obligations38,267 14,188 17,901 70,356 
Royalty revenues paid and payable(28,768)(2,494)(9,150)(40,412)
Balance as of December 31, 2023$174,480 $185,345 $171,774 $531,599 
     
Effective interest rate22.3 %— %10.0 %