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Basis of Presentation and Summary of Significant Accounting Policies - Revenue by Source (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue |  |  |  |
Total revenues | $ 51,812 | $ 32,868 | $ 124,321 | $ 103,213
Royalties |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 31,709 | 23,888 | 73,966 | 62,473
Revenue from intangible royalty assets |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 26,552 | 23,863 | 67,512 | 61,447
Kyprolis |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 11,599 | 10,537 | 27,229 | 24,862
Evomela |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 1,747 | 2,497 | 5,877 | 7,404
Teriparatide injection |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 2,376 | 2,800 | 6,520 | 9,913
Rylaze |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 3,886 | 3,678 | 10,070 | 9,315
Filspari |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 3,206 | 1,122 | 7,402 | 1,707
Vaxneuvance |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 1,466 | 1,313 | 3,962 | 2,990
Other |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 2,272 | 1,916 | 6,452 | 5,256
Income from financial royalty assets |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 5,157 | 25 | 6,454 | 1,026
Captisol |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 6,255 | 8,608 | 22,967 | 24,450
Contract revenue and other income |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 13,848 | 372 | 27,388 | 16,290
Milestone and other |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | 13,848 | 372 | 25,444 | 16,290
Other income |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | $ 0 | $ 0 | $ 1,944 | $ 0

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