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Equity and Other Investments and Fair Value Measurements - Schedule of Available-for-Sale Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value Measurements |  |
Contingent value rights | $ 0 | $ 359
Recurring basis |  |
Assets |  |
Total assets measured at estimated fair value | 734,331 | 705,963
Recurring basis | Money market funds |  |
Assets |  |
Total assets measured at estimated fair value | 252,259 | 170,706
Recurring basis | Equity investments and Money market funds | ISP Fund LP |  |
Assets |  |
Total assets measured at estimated fair value | 252,307 | 311,812
Recurring basis | Term loan investment | Armata July 2023 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 29,395 | 27,044
Recurring basis | Term loan investment | Armata March 2024 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 38,341 |
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 |  |
Assets |  |
Total assets measured at estimated fair value | 502,414 | 503,162
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Money market funds |  |
Assets |  |
Total assets measured at estimated fair value | 252,259 | 170,706
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investments and Money market funds | ISP Fund LP |  |
Assets |  |
Total assets measured at estimated fair value | 190,723 | 251,207
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Term loan investment | Armata July 2023 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Term loan investment | Armata March 2024 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
Recurring basis | Significant Other Observable Inputs, Level 2 |  |
Assets |  |
Total assets measured at estimated fair value | 14,117 | 35,297
Recurring basis | Significant Other Observable Inputs, Level 2 | Money market funds |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investments and Money market funds | ISP Fund LP |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Recurring basis | Significant Other Observable Inputs, Level 2 | Term loan investment | Armata July 2023 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Recurring basis | Significant Other Observable Inputs, Level 2 | Term loan investment | Armata March 2024 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
Recurring basis | Significant Unobservable Inputs, Level 3 |  |
Assets |  |
Total assets measured at estimated fair value | 217,800 | 167,504
Recurring basis | Significant Unobservable Inputs, Level 3 | Money market funds |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investments and Money market funds | ISP Fund LP |  |
Assets |  |
Total assets measured at estimated fair value | 61,584 | 60,605
Recurring basis | Significant Unobservable Inputs, Level 3 | Term loan investment | Armata July 2023 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 29,395 | 27,044
Recurring basis | Significant Unobservable Inputs, Level 3 | Term loan investment | Armata March 2024 Term Loan |  |
Assets |  |
Total assets measured at estimated fair value | 38,341 |
Nonrecurring basis |  |
Fair Value Measurements |  |
Contingent value rights |  | 359
Liabilities |  |
Total liabilities measured at estimated fair value |  | 427,836
Nonrecurring basis | Debt |  |
Fair Value Measurements |  |
Total fair value of debt | 476,849 | 427,477
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 |  |
Fair Value Measurements |  |
Contingent value rights |  | 0
Liabilities |  |
Total liabilities measured at estimated fair value |  | 0
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Debt |  |
Fair Value Measurements |  |
Total fair value of debt | 0 | 0
Nonrecurring basis | Significant Other Observable Inputs, Level 2 |  |
Fair Value Measurements |  |
Contingent value rights |  | 0
Liabilities |  |
Total liabilities measured at estimated fair value |  | 427,477
Nonrecurring basis | Significant Other Observable Inputs, Level 2 | Debt |  |
Fair Value Measurements |  |
Total fair value of debt | 476,849 | 427,477
Nonrecurring basis | Significant Unobservable Inputs, Level 3 |  |
Fair Value Measurements |  |
Contingent value rights |  | 359
Liabilities |  |
Total liabilities measured at estimated fair value |  | 359
Nonrecurring basis | Significant Unobservable Inputs, Level 3 | Debt |  |
Fair Value Measurements |  |
Total fair value of debt | 0 | 0
Nonrecurring basis | 2025 Notes | Debt |  |
Fair Value Measurements |  |
2025 Notes | 226,941 | 200,407
Nonrecurring basis | 2025 Notes | Quoted Price in Active Markets for Identical Assets, Level 1 | Debt |  |
Fair Value Measurements |  |
2025 Notes | 0 | 0
Nonrecurring basis | 2025 Notes | Significant Other Observable Inputs, Level 2 | Debt |  |
Fair Value Measurements |  |
2025 Notes | 226,941 | 200,407
Nonrecurring basis | 2025 Notes | Significant Unobservable Inputs, Level 3 | Debt |  |
Fair Value Measurements |  |
2025 Notes | 0 | 0
Nonrecurring basis | 2028 Notes | Debt |  |
Fair Value Measurements |  |
2028 Notes | 249,908 | 227,070
Nonrecurring basis | 2028 Notes | Quoted Price in Active Markets for Identical Assets, Level 1 | Debt |  |
Fair Value Measurements |  |
2028 Notes | 0 | 0
Nonrecurring basis | 2028 Notes | Significant Other Observable Inputs, Level 2 | Debt |  |
Fair Value Measurements |  |
2028 Notes | 249,908 | 227,070
Nonrecurring basis | 2028 Notes | Significant Unobservable Inputs, Level 3 | Debt |  |
Fair Value Measurements |  |
2028 Notes | 0 | 0
Armata | Recurring basis | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 45,484 | 51,883
Armata | Recurring basis | Equity investment | Common stock |  |
Assets |  |
Total assets measured at estimated fair value | 59,432 | 81,249
Armata | Recurring basis | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 14,117 | 35,297
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Common stock |  |
Assets |  |
Total assets measured at estimated fair value | 59,432 | 81,249
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Common stock |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 14,117 | 35,297
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 45,484 | 51,883
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Common stock |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
InCarda | Recurring basis | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 436 |
InCarda | Recurring basis | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 82 |
InCarda | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
InCarda | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
InCarda | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
InCarda | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
InCarda | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 436 |
InCarda | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Warrants |  |
Assets |  |
Total assets measured at estimated fair value | 82 |
ImaginAb | Recurring basis | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 3,091 |
ImaginAb | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
ImaginAb | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 |
ImaginAb | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 3,091 |
Gate Neuroscience [Member] | Recurring basis | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 39,387 | 27,972
Gate Neuroscience [Member] | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Gate Neuroscience [Member] | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | 0 | 0
Gate Neuroscience [Member] | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment |  |
Assets |  |
Total assets measured at estimated fair value | $ 39,387 | $ 27,972

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