Income Taxes - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Operating Loss Carryforwards [Line Items] | |||
| Valuation allowance | $ 706,349 | $ 671,718 | |
| Accrued deferred U.S. state income and foreign withholding taxes | 3,300 | ||
| Foreign net operating loss carryforwards | 60,500 | ||
| Income tax interest and penalties | 0 | $ 0 | $ 0 |
| United Kingdom | |||
| Operating Loss Carryforwards [Line Items] | |||
| (Decrease) increase in valuation allowance | (18,000) | ||
| United States | |||
| Operating Loss Carryforwards [Line Items] | |||
| (Decrease) increase in valuation allowance | 51,800 | ||
| Valuation allowance | 706,300 | ||
| Federal NOLs carryover | 1,588,800 | ||
| Research tax credit carryforwards | 102,600 | ||
| State | |||
| Operating Loss Carryforwards [Line Items] | |||
| Federal NOLs carryover | 812,600 | ||
| Research tax credit carryforwards | $ 45,000 | ||
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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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