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Accrued Expenses and Other Current Liabilities - Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
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Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | $ 33,528 | $ 24,207
Location, Statement of Financial Position, Balance [Axis]: ck0001991792:ExternalResearchAndDevelopmentExpenses |  |
Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | 24,927 | 13,936
Location, Statement of Financial Position, Balance [Axis]: ck0001991792:PersonnelRelatedExpenses |  |
Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | 5,576 | 8,216
Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccruedProfessionalFeesCurrent |  |
Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | 1,347 | 967
Location, Statement of Financial Position, Balance [Axis]: us-gaap:DeferredRevenueCurrent |  |
Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | 226 | 286
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent |  |
Accrued Expenses and Other Current Liabilities [Line Items] |  |
Total accrued expenses and other current liabilities | $ 1,452 | $ 802

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- Definition Accrued expenses and other current liabilities. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Definition Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Details
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