Document and Entity Information Document Type Document Quarterly Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address State Or Province Entity Address, Address Line One Entity Address, Adress Line Two Entity Address, City or Town Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security No Trading Symbol Flag Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONSOLIDATED BALANCE SHEET Assets [Abstract] ASSETS Assets Assets Total Assets Commitments and Contingencies Commitments and contingencies Equity, Attributable to Parent [Abstract] Equity: Common Stock, Value, Issued Common Stock, par value $0.0001 per share 100 shares authorized as of June 30, 2026 and December 31, 2025 100 shares issued and outstanding as of June 30, 2026 and December 31, 2025 Receivable from Shareholders or Affiliates for Issuance of Capital Stock Due from shareholder Equity, Attributable to Parent Ending balance Beginning balance Total Equity Liabilities and Equity Total Liabilities and Equity Common Stock, Par or Stated Value Per Share Common Stock, par value Common stock, par value Common Stock, Shares Authorized Common Stock, shares authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, shares issued Common stock, shares issued Common Stock, Shares, Outstanding Ending balance (in shares) Beginning balance (in shares) Common stock, shares outstanding CONSOLIDATED STATEMENT OF OPERATIONS Revenue from Contract with Customer, Excluding Assessed Tax Revenues Operating Expenses Operating expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Earnings before income taxes Income Tax Expense (Benefit) Provision for income taxes Net Income (Loss) Attributable to Parent Net income Earnings Per Share, Basic Earnings per share of common stock - basic Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares of common stock outstanding - basic Weighted Average Number of Shares Outstanding, Diluted Weighted average number of shares of common stock outstanding - diluted CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income CONSOLIDATED STATEMENT OF CASH FLOWS Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Operating Activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income to net cash flow provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital Change in assets and liabilities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash flow provided by operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash flow provided by investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash flow provided by financing activities Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents at end of the period Cash and cash equivalents at beginning of year CONSOLIDATED STATEMENT OF EQUITY Statement [Table] Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-In Capital Treasury Stock, Common [Member] Treasury Stock Receivables from Stockholder [Member] Due from Shareholder Retained Earnings [Member] Retained Earnings AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] CONSOLIDATED STATEMENT OF EQUITY Stock Issued During Period, Shares, New Issues Stock issuance (in shares) Stock Issued During Period, Value, New Issues Stock issuance BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] BASIS OF PRESENTATION EQUITY Equity [Text Block] EQUITY Disclosure of information about basis of presentation. Basis of Presentation [Table] Ownership [Axis] Ownership [Domain] Represents the member information pertaining to Beacon Topco, Inc. Beacon Topco, Inc [Member] Beacon Topco, Inc Legal Entity [Axis] Entity [Domain] Represents the member information pertaining to Barinthus Biotherapeutics plc. Barinthus Biotherapeutics Plc [Member] Barinthus Bio shareholders Represents the member information pertaining to Clywedog Therapeutics, Inc. Clywedog Therapeutics, Inc [Member] Clywedog stockholders 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. Basis of Presentation [Line Items] BASIS OF PRESENTATION The number of wholly owned subsidiaries. Number of Wholly Owned Subsidiaries Number of wholly owned subsidiaries Liabilities Liabilities Subsidiary, Ownership Percentage, Noncontrolling Owner Ownership interest (in percent) Subsidiary, Ownership Percentage, Parent Ownership interest (in percent)