Segment Reporting - Schedule of Disaggregation of Income Statement Expenses (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Segment Reporting Information [Line Items] | ||
| Research and development | $ 312,779 | $ 148,134 |
| General and administrative | 33,071 | 32,659 |
| Total operating expenses | 345,850 | 180,793 |
| Total other income, net | 25,228 | 40,075 |
| Net loss | 320,622 | 140,718 |
| Reportable Segment | ||
| Segment Reporting Information [Line Items] | ||
| General and administrative | 33,071 | 32,659 |
| Total operating expenses | 345,850 | 180,793 |
| Total other income, net | 25,228 | 40,075 |
| Net loss | 320,622 | 140,718 |
| Research and development - external costs | Reportable Segment | ||
| Segment Reporting Information [Line Items] | ||
| Research and development | 256,432 | 103,806 |
| Research and development - internal costs | Reportable Segment | ||
| Segment Reporting Information [Line Items] | ||
| Research and development | $ 56,347 | $ 44,328 |
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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. No definition available.
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