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Fair Value of Financial Assets and Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2025
Summary of Long Term And Short Term Debt at Fair Value Hierarchy of Valuation Inputs Utilized to Determine Fair Value | The following table presents information about the Company’s RLNs, promissory note to Pfizer (the Promissory Note) and Exchangeable Notes and indicates the fair value hierarchy of the valuation inputs utilized to determine the approximate fair value:
September 30, 2025 |  | Book |  |  | Approximate |  |  |  |  |  |  |  |  |  |
Current Liabilities |  | Value |  |  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Royalty-linked notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term royalty-linked notes |  | $ | 281 |  |  | $ | 281 |  |  | $ | — |  |  | $ | — |  |  | $ | 281 |
Total current liabilities |  | $ | 281 |  |  | $ | 281 |  |  | $ | — |  |  | $ | — |  |  | $ | 281 |
Long-term Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Promissory Note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term promissory note |  | $ | 21,215 |  |  | $ | 21,619 |  |  | $ | — |  |  | $ | 21,619 |  |  | $ | — |
Revenue Futures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty-linked notes |  |  | 12,239 |  |  |  | 12,239 |  |  |  | — |  |  |  | — |  |  |  | 12,239 |
Total long-term liabilities |  | $ | 33,454 |  |  | $ | 33,858 |  |  | $ |  |  |  | $ | 21,619 |  |  | $ | 12,239 |
December 31, 2024 |  | Book |  |  | Approximate |  |  |  |  |  |  |  |  |  |
Current Liabilities |  | Value |  |  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Exchangeable Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term exchangeable notes |  | $ | 14,463 |  |  | $ | 14,444 |  |  | $ | — |  |  | $ | 14,444 |  |  | $ | — |
Total current liabilities |  | $ | 14,463 |  |  | $ | 14,444 |  |  | $ | — |  |  | $ | 14,444 |  |  | $ | — |
Long-term Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Promissory Note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term promissory note |  | $ | 20,300 |  |  | $ | 20,412 |  |  | $ | — |  |  | $ | 20,412 |  |  | $ | — |
Revenue Futures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty-linked notes |  |  | 10,771 |  |  |  | 10,771 |  |  |  | — |  |  |  | — |  |  |  | 10,771 |
Total long-term liabilities |  | $ | 31,071 |  |  | $ | 31,183 |  |  | $ | — |  |  | $ | 20,412 |  |  | $ | 10,771 |

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- Definition Summary of long term and short term debt at fair value hierarchy of valuation inputs utilized to determine fair value. + References No definition available. + Details
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