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Basis of Presentation and Summary of Significant Accounting Policies - Royalty Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue |  |  |
Total revenues | $ 131,314 | $ 196,245 | $ 241,544
Royalties |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 83,910 | 72,527 | 48,927
Kyprolis |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 35,640 | 30,116 | 27,472
Evomela |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 10,212 | 10,197 | 10,079
Teriparatide injection |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 11,061 | 15,785 | 5,260
Rylaze |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 13,520 | 8,796 | 2,420
Other |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 13,477 | 7,633 | 3,696
Captisol |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 28,372 | 104,495 | 164,250
Captisol - Core |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 28,372 | 16,429 | 23,423
Captisol - COVID |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 0 | 88,066 | 140,827
Contract |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 19,032 | 19,223 | 28,367
Service Revenue |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 615 | 1,117 | 3,737
License Fees |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 217 | 2,849 | 634
Milestone |  |  |
Disaggregation of Revenue |  |  |
Total revenues | 16,800 | 9,150 | 17,584
Other |  |  |
Disaggregation of Revenue |  |  |
Total revenues | $ 1,400 | $ 6,107 | $ 6,412

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