3.25.2 html 61 171 1 true 15 0 false 6 false false R1.htm 000100 - Document - Document and Entity Information Sheet http://ghres.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 010000 - Statement - Unaudited condensed consolidated interim statement of comprehensive loss Sheet http://ghres.com/role/UnauditedCondensedConsolidatedInterimStatementOfComprehensiveLoss Unaudited condensed consolidated interim statement of comprehensive loss Statements 2 false false R3.htm 020000 - Statement - Unaudited condensed consolidated interim statement of financial position Sheet http://ghres.com/role/UnauditedCondensedConsolidatedInterimStatementOfFinancialPosition Unaudited condensed consolidated interim statement of financial position Statements 3 false false R4.htm 030000 - Statement - Unaudited condensed consolidated interim statement of changes in equity Sheet http://ghres.com/role/UnauditedCondensedConsolidatedInterimStatementOfChangesInEquity Unaudited condensed consolidated interim statement of changes in equity Statements 4 false false R5.htm 040000 - Statement - Unaudited condensed consolidated interim statement of cash flows Sheet http://ghres.com/role/UnauditedCondensedConsolidatedInterimStatementOfCashFlows Unaudited condensed consolidated interim statement of cash flows Statements 5 false false R6.htm 060100 - Disclosure - Corporate information Sheet http://ghres.com/role/CorporateInformation Corporate information Notes 6 false false R7.htm 060200 - Disclosure - Basis of preparation, significant judgments, and accounting policies Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPolicies Basis of preparation, significant judgments, and accounting policies Notes 7 false false R8.htm 060300 - Disclosure - Expenses by nature Sheet http://ghres.com/role/ExpensesByNature Expenses by nature Notes 8 false false R9.htm 060400 - Disclosure - Finance income and expense Sheet http://ghres.com/role/FinanceIncomeAndExpense Finance income and expense Notes 9 false false R10.htm 060500 - Disclosure - Cash and cash equivalents Sheet http://ghres.com/role/CashAndCashEquivalents Cash and cash equivalents Notes 10 false false R11.htm 060600 - Disclosure - Marketable securities Sheet http://ghres.com/role/MarketableSecurities Marketable securities Notes 11 false false R12.htm 060700 - Disclosure - Other current assets Sheet http://ghres.com/role/OtherCurrentAssets Other current assets Notes 12 false false R13.htm 060800 - Disclosure - Other non-current assets Sheet http://ghres.com/role/OtherNoncurrentAssets Other non-current assets Notes 13 false false R14.htm 060900 - Disclosure - Trade payables Sheet http://ghres.com/role/TradePayables Trade payables Notes 14 false false R15.htm 061000 - Disclosure - Other current liabilities Sheet http://ghres.com/role/OtherCurrentLiabilities Other current liabilities Notes 15 false false R16.htm 061100 - Disclosure - Share capital Sheet http://ghres.com/role/ShareCapital Share capital Notes 16 false false R17.htm 061200 - Disclosure - Contingencies Sheet http://ghres.com/role/Contingencies Contingencies Notes 17 false false R18.htm 061300 - Disclosure - Share based compensation Sheet http://ghres.com/role/ShareBasedCompensation Share based compensation Notes 18 false false R19.htm 061400 - Disclosure - Related party disclosures Sheet http://ghres.com/role/RelatedPartyDisclosures Related party disclosures Notes 19 false false R20.htm 061500 - Disclosure - Loss per share Sheet http://ghres.com/role/LossPerShare Loss per share Notes 20 false false R21.htm 061600 - Disclosure - Events after the reporting date Sheet http://ghres.com/role/EventsAfterReportingDate Events after the reporting date Notes 21 false false R22.htm 070200 - Disclosure - Basis of preparation, significant judgments, and accounting policies (Policies) Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesPolicies Basis of preparation, significant judgments, and accounting policies (Policies) Policies 22 false false R23.htm 080300 - Disclosure - Expenses by nature (Tables) Sheet http://ghres.com/role/ExpensesByNatureTables Expenses by nature (Tables) Tables http://ghres.com/role/ExpensesByNature 23 false false R24.htm 080400 - Disclosure - Finance income and expense (Tables) Sheet http://ghres.com/role/FinanceIncomeAndExpenseTables Finance income and expense (Tables) Tables http://ghres.com/role/FinanceIncomeAndExpense 24 false false R25.htm 080500 - Disclosure - Cash and cash equivalents (Tables) Sheet http://ghres.com/role/CashAndCashEquivalentsTables Cash and cash equivalents (Tables) Tables http://ghres.com/role/CashAndCashEquivalents 25 false false R26.htm 080600 - Disclosure - Marketable securities (Tables) Sheet http://ghres.com/role/MarketableSecuritiesTables Marketable securities (Tables) Tables http://ghres.com/role/MarketableSecurities 26 false false R27.htm 081100 - Disclosure - Share capital (Tables) Sheet http://ghres.com/role/ShareCapitalTables Share capital (Tables) Tables http://ghres.com/role/ShareCapital 27 false false R28.htm 081300 - Disclosure - Share based compensation (Tables) Sheet http://ghres.com/role/ShareBasedCompensationTables Share based compensation (Tables) Tables http://ghres.com/role/ShareBasedCompensation 28 false false R29.htm 081500 - Disclosure - Loss per share (Tables) Sheet http://ghres.com/role/LossPerShareTables Loss per share (Tables) Tables http://ghres.com/role/LossPerShare 29 false false R30.htm 090100 - Disclosure - Corporate information (Details) Sheet http://ghres.com/role/CorporateInformationDetails Corporate information (Details) Details http://ghres.com/role/CorporateInformation 30 false false R31.htm 090200 - Disclosure - Basis of preparation, significant judgments, and accounting policies, Going Concern (Details) Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesGoingConcernDetails Basis of preparation, significant judgments, and accounting policies, Going Concern (Details) Details http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesPolicies 31 false false R32.htm 090202 - Disclosure - Basis of preparation, significant judgments, and accounting policies, Research and Development Tax Credits (Details) Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesResearchAndDevelopmentTaxCreditsDetails Basis of preparation, significant judgments, and accounting policies, Research and Development Tax Credits (Details) Details 32 false false R33.htm 090204 - Disclosure - Basis of preparation, significant judgments, and accounting policies, Current and Deferred Income Tax (Details) Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesCurrentAndDeferredIncomeTaxDetails Basis of preparation, significant judgments, and accounting policies, Current and Deferred Income Tax (Details) Details 33 false false R34.htm 090206 - Disclosure - Basis of preparation, significant judgments, and accounting policies, Segment Reporting (Details) Sheet http://ghres.com/role/BasisOfPreparationSignificantJudgmentsAndAccountingPoliciesSegmentReportingDetails Basis of preparation, significant judgments, and accounting policies, Segment Reporting (Details) Details 34 false false R35.htm 090300 - Disclosure - Expenses by nature (Details) Sheet http://ghres.com/role/ExpensesByNatureDetails Expenses by nature (Details) Details http://ghres.com/role/ExpensesByNatureTables 35 false false R36.htm 090400 - Disclosure - Finance income and expense (Details) Sheet http://ghres.com/role/FinanceIncomeAndExpenseDetails Finance income and expense (Details) Details http://ghres.com/role/FinanceIncomeAndExpenseTables 36 false false R37.htm 090500 - Disclosure - Cash and cash equivalents (Details) Sheet http://ghres.com/role/CashAndCashEquivalentsDetails Cash and cash equivalents (Details) Details http://ghres.com/role/CashAndCashEquivalentsTables 37 false false R38.htm 090600 - Disclosure - Marketable securities, Measured at FVOCI (Details) Sheet http://ghres.com/role/MarketableSecuritiesMeasuredAtFvociDetails Marketable securities, Measured at FVOCI (Details) Details 38 false false R39.htm 090602 - Disclosure - Marketable securities, Reconciliation of the movement FVOCI (Details) Sheet http://ghres.com/role/MarketableSecuritiesReconciliationOfMovementFvociDetails Marketable securities, Reconciliation of the movement FVOCI (Details) Details 39 false false R40.htm 091100 - Disclosure - Share capital (Details) Sheet http://ghres.com/role/ShareCapitalDetails Share capital (Details) Details http://ghres.com/role/ShareCapitalTables 40 false false R41.htm 091300 - Disclosure - Share based compensation, Share Options (Details) Sheet http://ghres.com/role/ShareBasedCompensationShareOptionsDetails Share based compensation, Share Options (Details) Details 41 false false R42.htm 091302 - Disclosure - Share based compensation, Share Option Awards Outstanding (Details) Sheet http://ghres.com/role/ShareBasedCompensationShareOptionAwardsOutstandingDetails Share based compensation, Share Option Awards Outstanding (Details) Details 42 false false R43.htm 091304 - Disclosure - Share based compensation, Fair Values of the Options Granted (Details) Sheet http://ghres.com/role/ShareBasedCompensationFairValuesOfOptionsGrantedDetails Share based compensation, Fair Values of the Options Granted (Details) Details 43 false false R44.htm 091400 - Disclosure - Related party disclosures (Details) Sheet http://ghres.com/role/RelatedPartyDisclosuresDetails Related party disclosures (Details) Details http://ghres.com/role/RelatedPartyDisclosures 44 false false R45.htm 091500 - Disclosure - Loss per share (Details) Sheet http://ghres.com/role/LossPerShareDetails Loss per share (Details) Details http://ghres.com/role/LossPerShareTables 45 false false All Reports Book All Reports ef20050525_6k.htm ef20050525_ex99-1.htm ghrs-20250630.xsd ghrs-20250630_cal.xml ghrs-20250630_def.xml ghrs-20250630_lab.xml ghrs-20250630_pre.xml image00002.jpg http://xbrl.sec.gov/dei/2024 https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full true true