Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | |||
| UK R&D tax credit | $ 36,147 | $ 20,712 | |
| Prepaid research and development | 14,426 | 11,332 | |
| VAT recoverable | 1,181 | 1,109 | |
| Prepaid insurance premium | 647 | 280 | |
| Other current assets | 1,742 | 2,388 | |
| Prepaid expense and other current assets | $ 54,143 | $ 35,821 | |
| Increase to research and development tax credits | $ 4,100 |
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- Definition Increase (Decrease) To Research And Development Tax Credits No definition available.
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- Definition Prepaid Expense, Research And Development, Current No definition available.
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- Definition Research And Development Tax Credit, Current No definition available.
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- References No definition available.
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- Definition Amount of current assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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