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Prepaid Expenses and Other Current Assets | 3 Months Ended
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Mar. 31, 2026
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Prepaid Expenses and Other Current Assets | Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands):
|  | March 31, |  | December 31,
|  | 2026 |  | 2025
UK R&D tax credit |  | $ | 15,130 |  |  | $ | 15,387 |
Prepaid research and development |  | 18,920 |  |  | 17,102 |
Prepaid income tax |  | 3,099 |  |  | 3,434 |
Other current assets |  | 7,329 |  |  | 5,580 |
|  | $ | 44,478 |  |  | $ | 41,503 |
For the years ended December 31, 2023 to 2025, the Company is uncertain whether it met the R&D intensity condition and is eligible for the enhanced effective rate due to uncertainties over whether impairments on intercompany loans and investments in subsidiary companies should be taken into account in determining the R&D intensity threshold. This matter is currently under discussion with His Majesty’s Revenue and Customs, or HMRC, and the outcome is unknown. Given the uncertainty over the outcome of the discussions with HMRC, the enhanced R&D credits as a research intensive company have not been reflected in the financial statements. If the Company reaches a successful conclusion with HMRC, additional credits of $4.1 million in the year ended December 31, 2023, $7.0 million in the year ended December 31, 2024 and $7.3 million in the year ended December 31, 2025 could be claimed.

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