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Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2010 cvr | Dec. 31, 2023 USD ($) | Sep. 18, 2023 contract | Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag |  | Derivative assets(2) |  |
Number of CVR Series | cvr | 4 |  |  |
Primrose Bio |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Interest in potential development milestone (as a percent) |  |  | 50.00% |
Primordial Genetics |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Number of contracts | contract |  |  | 2 |
Transferred over Time | Phase 3 clinical trial |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Gross contract asset |  | $ 10,000,000 |  |
Maximum | Transferred over Time | Development, regulatory, & commercial milestones and tiered royalties |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments |  | 375,000,000 |  |
Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Number of CVRs issued per acquiree share | cvr | 4 |  |  |
Number of CVRs issued from each CVR series | cvr | 1 |  |  |
Frequency of cash payments to CVR holders | 6 months |  |  |
Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Total liabilities |  |  |  | $ 84,000
Recurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investment in Viking common stock |  | 32,185,000 |  | 63,122,000
Derivative asset |  | 3,531,000 |  |
Total assets |  | 150,886,000 |  | 166,864,000
Liability for amounts owed to a former licensor |  |  |  | 44,000
Total liabilities |  | 3,198,000 |  | 3,557,000
Recurring | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments, fair value |  | 115,170,000 |  | 103,742,000
Recurring | Contingent liabilities | CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 320,000 |  | 84,000
Recurring | Contingent liabilities | Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 2,878,000 |  | 3,429,000
Recurring | Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investment in Viking common stock |  | 32,185,000 |  | 63,122,000
Derivative asset |  | 0 |  |
Total assets |  | 39,476,000 |  | 67,114,000
Liability for amounts owed to a former licensor |  |  |  | 44,000
Total liabilities |  | 0 |  | 44,000
Recurring | Level 1 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments, fair value |  | 7,291,000 |  | 3,992,000
Recurring | Level 1 | Contingent liabilities | CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 0 |  | 0
Recurring | Level 1 | Contingent liabilities | Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 0 |  | 0
Recurring | Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investment in Viking common stock |  | 0 |  | 0
Derivative asset |  | 0 |  |
Total assets |  | 107,879,000 |  | 99,615,000
Liability for amounts owed to a former licensor |  |  |  | 0
Total liabilities |  | 2,878,000 |  | 3,429,000
Recurring | Level 2 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments, fair value |  | 107,879,000 |  | 99,615,000
Recurring | Level 2 | Contingent liabilities | CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 0 |  | 0
Recurring | Level 2 | Contingent liabilities | Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 2,878,000 |  | 3,429,000
Recurring | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investment in Viking common stock |  | 0 |  | 0
Derivative asset |  | 3,531,000 |  |
Total assets |  | 3,531,000 |  | 135,000
Liability for amounts owed to a former licensor |  |  |  | 0
Total liabilities |  | 320,000 |  |
Recurring | Level 3 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments, fair value |  | 0 |  | 135,000
Recurring | Level 3 | Contingent liabilities | CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | 320,000 |  | 84,000
Recurring | Level 3 | Contingent liabilities | Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Contingent liabilities |  | $ 0 |  | $ 0

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