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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2010 contingent_value_right contingent_value_right_series | Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Number of CVR Series | contingent_value_right_series | 4 |  |  |
Common Stock |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Viking common stock |  | $ 19,407,000 | $ 19,407,000 | $ 30,889,000
Transferred over Time | Phase 3 Clinical Trial |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gross contract asset |  | 10,000,000 | 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 [Line Items] |  |  |  |
Investments |  | 375,000,000 | 375,000,000 |
Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Number of CVRs issued per acquiree share | contingent_value_right | 4 |  |  |
Number of CVRs issued from each CVR series | contingent_value_right | 1 |  |  |
Frequency of cash payments to CVR holders | 6 months |  |  |
xCella | Earnout Rights for Partner Research and Development |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Earnout rights recognized |  | 500,000 | 1,000,000 |
Contingent liabilities - Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Mark-to-market adjustment of CVR liability |  | (400,000) | (1,000,000) |
Contingent liabilities - Icagen |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Mark-to-market adjustment of CVR liability |  | 200,000 | (300,000) |
Payment for contingent consideration liabilities |  | 1,500,000 |  |
Recurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 142,655,000 | 142,655,000 | 321,586,000
Liabilities, fair value |  | 9,291,000 | 9,291,000 | 11,157,000
Recurring | Contingent liabilities - CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 317,000 | 317,000 | 349,000
Recurring | Contingent liabilities - Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 2,400,000 | 2,400,000 | 3,358,000
Recurring | Contingent liabilities - Icagen |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 5,542,000 | 5,542,000 | 7,364,000
Recurring | Contingent liabilities - xCella |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 960,000 | 960,000 | 0
Recurring | Amounts owed to former licensor |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 72,000 | 72,000 | 86,000
Recurring | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 123,248,000 | 123,248,000 | 290,697,000
Recurring | Investment in Viking common stock |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 19,407,000 | 19,407,000 |
Recurring | Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 23,993,000 | 23,993,000 | 40,624,000
Liabilities, fair value |  | 72,000 | 72,000 | 86,000
Recurring | Level 1 | Contingent liabilities - CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 1 | Contingent liabilities - Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 1 | Contingent liabilities - Icagen |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 1 | Contingent liabilities - xCella |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 1 | Amounts owed to former licensor |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 72,000 | 72,000 | 86,000
Recurring | Level 1 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 4,586,000 | 4,586,000 | 9,735,000
Recurring | Level 1 | Investment in Viking common stock |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  |  |  | 30,889,000
Recurring | Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 118,533,000 | 118,533,000 | 280,553,000
Liabilities, fair value |  | 2,400,000 | 2,400,000 | 3,358,000
Recurring | Level 2 | Contingent liabilities - CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 2 | Contingent liabilities - Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 2,400,000 | 2,400,000 | 3,358,000
Recurring | Level 2 | Contingent liabilities - Icagen |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 2 | Contingent liabilities - xCella |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 2 | Amounts owed to former licensor |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 2 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 118,533,000 | 118,533,000 | 280,553,000
Recurring | Level 2 | Investment in Viking common stock |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 0 | 0 | 0
Recurring | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 129,000 | 129,000 | 409,000
Liabilities, fair value |  | 6,819,000 | 6,819,000 | 7,713,000
Recurring | Level 3 | Contingent liabilities - CyDex |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 317,000 | 317,000 | 349,000
Recurring | Level 3 | Contingent liabilities - Metabasis |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 3 | Contingent liabilities - Icagen |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 5,542,000 | 5,542,000 | 7,364,000
Recurring | Level 3 | Contingent liabilities - xCella |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 960,000 | 960,000 | 0
Recurring | Level 3 | Amounts owed to former licensor |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Liabilities, fair value |  | 0 | 0 | 0
Recurring | Level 3 | Short-term investments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | 129,000 | 129,000 | 409,000
Recurring | Level 3 | Investment in Viking common stock |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value |  | $ 0 | $ 0 | $ 0

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