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          <link:loc xlink:type="locator" xlink:href="hdrn-20260630.xsd#hdrn_SimpleAgreementsForFutureEquityDisclosureAbstract" xlink:label="hdrn_SimpleAgreementsForFutureEquityDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForLegalSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Legal Settlements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForLegalSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments for legal settlements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time to maturity - years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GigCapital7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GigCapital7</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GigCapital7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gig Capital 7 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GigCapital7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">GigCapital7.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accrued Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accrued Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Share Price [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Professional Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Over-Allotment Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Over Allotment Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromBusinessCombinationNetFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Business Combination Net Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromBusinessCombinationNetFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from business combination net financing activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromBusinessCombinationNetFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Business Combination, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 12)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted weighted-average non-redeemable ordinary shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Denominator for diluted net loss per share - common shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average shares outstanding - Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OfficeSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office Space [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OfficeSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Office Space.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodFromClosingOfOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants exercisable period from closing of offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodFromClosingOfOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Exercisable Period From Closing of Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodFromClosingOfOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period after offering when warrants become exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounting Policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilityNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liability non current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilityNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liability Non Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilityNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConvertibleLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConvertibleLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Shares Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Preferred Stock, Shares Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred shares, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value on Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionImpliedRemainingTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value assumption implied remaining term volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionImpliedRemainingTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption implied remaining term volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionImpliedRemainingTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Implied Remaining Term Volatility (reset date through termination)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PotentiallyDilutiveSecuritiesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potentially Dilutive Securities, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PotentiallyDilutiveSecuritiesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potentially Dilutive Securities, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PotentiallyDilutiveSecuritiesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total potentially dilutive securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of units in private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants to purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAcquiredFromAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, cash proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAcquiredFromAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Acquired from Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk free rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption risk free interest rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assumption Risk Free Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Risk free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ExchangedOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exchanged Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ExchangedOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exchanged Options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Settlement Liability Converted Into Common Stock And Additional Paid-in Capital Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legal settlement liability converted into common stock and additional paid-in capital value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal settlement liability converted into common stock and additional paid-in capital, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ReverseRecapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse Recapitalization Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ReverseRecapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reverse recapitalization amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ReverseRecapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse recapitalization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Description of Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of units description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Emerging growth company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Emerging Growth Company [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ScheduleOfFairValueOfWarrantsEstimatedUsingAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value of Warrants Estimated Using Assumptions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ScheduleOfFairValueOfWarrantsEstimatedUsingAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of fair value of warrants estimated using assumptions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ScheduleOfFairValueOfWarrantsEstimatedUsingAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Fair Value of Warrants Estimated Using Assumptions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant liabilities issued in connection with Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash or Part Noncash Acquisition, Value of Liabilities Assumed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Noncash or Part Noncash Acquisition, Value of Liabilities Assumed, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income (loss) per share - Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss) per share - basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercise Price per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant exercise price per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercise price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock shares exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock shares exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common warrants member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnderwritersOverAllotmentOptionsExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriters over allotment options expiration date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnderwritersOverAllotmentOptionsExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriters over allotment options expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants, outstanding inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfWarrantsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Warrants Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfWarrantsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants exercisable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfWarrantsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputShortTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Short Term Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputShortTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement Input Short Term Volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputShortTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short Term Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisableExpirationPeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants exercisable expiration period after completion of business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisableExpirationPeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Exercisable Expiration Period After Completion of Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisableExpirationPeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercisable expiration period after completion of business combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class B Ordinary Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants redemption covenant threshold trading period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants redemption covenant threshold trading period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants redemption covenant, threshold trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Percent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Income Tax Rate Reconciliation, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Simple Agreements for Future Equity (SAFEs)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simple Agreements For Future Equity Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple agreements for future equity disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LeaseBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Base Rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LeaseBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease base rent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LeaseBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease, base rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Leases [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simple Agreements for Future Equity Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple Agreements for Future Equity Policy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicOfferingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public offering disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicOfferingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Offering Disclosure [Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal settlement liability converted into common stock and additional paid-in capital, shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legal settlement liability converted into common stock and additional paid-in capital shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation and Principles of Consolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_TwoThousandTwentyFourEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four Equity Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_TwoThousandTwentyFourEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four Equity Incentive Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_TwoThousandTwentyFourEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 Equity Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock, Class of Stock [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_LitigationCaseAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Case [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vested, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combination, transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Transaction Cost, Excluding Separately Recognized Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedValueSettlementOfLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued Value Settlement Of Litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedValueSettlementOfLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued value settlement of litigation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedValueSettlementOfLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining legal amount settled in stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair Value of Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationStatusDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Status [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal settlement liability reclassified to additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Settlement Liability Reclassified To Additional Paid In Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementLiabilityReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legal settlement liability reclassified to additional paid in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock: $0.0001 par value; 615,000,000 and 99,997,946 shares authorized as of June 30, 2026 and December 31, 2025, respectively; 70,220,020 and 46,066,754 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciliation Net Loss Per Ordinary Share Basic and Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Reconciliation Net Loss Per Ordinary Share Basic and Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Assets and Liabilities are Measured at Fair Value on Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Retained Earnings (Accumulated Deficit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Retained earnings accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simple Agreements For Future Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple Agreements For Future Equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityBankruptcyProceedingsReportingCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Bankruptcy Proceedings, Reporting Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionShortTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value assumption short term volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionShortTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption short term volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionShortTermVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short term volatility (through reset date)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of common stock price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">working capital loan price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExerciseDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercise Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExerciseDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant exercise description.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExerciseDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercise description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of Class B ordinary shares in private placement, shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants or rights outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnderwritingDiscountPerPublicUnitPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriting discount per public unit paid in cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnderwritingDiscountPerPublicUnitPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discount Per Public Unit Paid In Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnderwritingDiscountPerPublicUnitPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discount per public unit paid in cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilitiesIssuedInConnectionWithBusinessCombinationValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liabilities Issued In Connection With Business Combination Value</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated depreciation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ReverseRecapitalization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse Recapitalization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ReverseRecapitalization_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reverse recapitalization.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Transaction Costs Reclassified to Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred transaction costs reclassified to additional paid-in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsReclassifiedToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred transaction costs reclassified to additional Paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected shares from SAFEs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted, Adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Adjustment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting Of Restricted Shares Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vesting of restricted shares shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted shares, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_LitigationCaseTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Case [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cancelled In Period Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options cancelled in period weighted average grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share based compensation arrangement term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsWrittenOffToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Financing Costs Written Off to Additional Paid In Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsWrittenOffToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred financing costs written off to additional paid in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsWrittenOffToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs written off to additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ThresholdPercentageToHoldNumberOfPublicSharesInExcessOfIfNumberOfPublicSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Threshold percentage to hold number of public shares in excess of if number of public shares outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ThresholdPercentageToHoldNumberOfPublicSharesInExcessOfIfNumberOfPublicSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Threshold percentage to hold number of public shares in excess of if number of public shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ThresholdPercentageToHoldNumberOfPublicSharesInExcessOfIfNumberOfPublicSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold percentage to hold number of public shares in excess of if number of public shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Proceeds from Business Combination Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares proceeds from business combination net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Business Combination, net, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Research and Development Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnvestedSharesOfRestrictedStockPurchaseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unvested shares of restricted stock purchase agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnvestedSharesOfRestrictedStockPurchaseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unvested shares of restricted stock purchase agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_UnvestedSharesOfRestrictedStockPurchaseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested Shares of Restricted Stock Purchase Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantOrRightRedemptionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right redemption price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantOrRightRedemptionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right Redemption Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantOrRightRedemptionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption price per warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionsVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumptions volatility rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionsVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assumptions Volatility Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionsVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPricePerShareRequiredForRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum price per share required for redemption of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPricePerShareRequiredForRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Price Per Share Required for Redemption of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPricePerShareRequiredForRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum price per share required for redemption of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Accounting Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareOwnedByCertainNonManagingInvestorsAfterOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of share owned by certain non managing investors after offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareOwnedByCertainNonManagingInvestorsAfterOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Share Owned By Certain Non Managing Investors After Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareOwnedByCertainNonManagingInvestorsAfterOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of share owned by certain non managing investors after offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Antidilutive Securities Excluded From Computation Of Earnings PerShare</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ExpectedSharesFromSAFENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Shares from SAFE Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ExpectedSharesFromSAFENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected Shares from SAFE Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ExpectedSharesFromSAFENotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Expected shares from SAFE notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Note Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationUnpaidTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Unpaid Transaction Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationUnpaidTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination unpaid transaction costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationUnpaidTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination unpaid transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationNonproduction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationNonproduction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Nonproduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ordinary Shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of dilutive securities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization consolidation and presentation of financial statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Denominator for basic net income (loss) per share - common shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average shares outstanding - Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Proceeds From Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value proceeds from business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Business Combination, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilitiesIssuedInConnectionWithBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant liabilities issued in connection with Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantLiabilitiesIssuedInConnectionWithBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liabilities issued in connection with business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease, base rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Businesses, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount paid under forward purchase agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash provided by (used in) operating activity, including discontinued operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfFractionalSharesIssuedUponExerciseOfPublicWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of fractional shares issued upon exercise of public warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfFractionalSharesIssuedUponExerciseOfPublicWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of fractional shares issued upon exercise of public warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share - Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss per share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of units in private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Net income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net income (loss) and comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Adjustment of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrant liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Change in fair value of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Change in fair value of warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Operating Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Other Operating Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sponsor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sponsor[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sponsor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounting policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPeriodOfPriorWrittenNoticeOfRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum period of prior written notice of redemption of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPeriodOfPriorWrittenNoticeOfRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum period of prior written notice of redemption of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MinimumPeriodOfPriorWrittenNoticeOfRedemptionOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum period of prior written notice of redemption of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Employee Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantPerShareValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant per share value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantPerShareValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Per Share value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ClassOfWarrantPerShareValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant per share value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_HadronPrivateWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hadron Private Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_HadronPrivateWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hadron private warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_HadronPrivateWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hadron Private Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred shares, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Concentration Risk, Credit Risk, Cash Account, FDIC Coverage Limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk, Credit Risk, Cash Account, FDIC Coverage Limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total potentially dilutive securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockIncludingPreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Including Preferred Stock Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockIncludingPreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock including preferred stock shares authorized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockIncludingPreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Proceeds from Business Combination Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value proceeds from business combination net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombinationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Business Combination, net, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdConsecutiveTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants Redemption Covenant Threshold Consecutive Trading Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdConsecutiveTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Redemption Covenant Threshold Consecutive Trading Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsRedemptionCovenantThresholdConsecutiveTradingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants redemption covenant, threshold consecutive trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cancelled In Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options cancelled in period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cancelled, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accrued Liabilities, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding options converted into exchanged options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationExchangeRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Exchange Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationExchangeRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination exchange ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BusinessCombinationExchangeRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of SAFES Into Common Stock And Additional Paid-in Capital Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of SAFESs into common stock and additional paid-in capital value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of SAFEs into common stock and additional paid-in capital, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FormerEmployeeRelatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Former Employee Related [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FormerEmployeeRelatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Former employee related.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BeforeReverseRecapitalizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Before Reverse Recapitalization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BeforeReverseRecapitalizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Before Reverse Recapitalization [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_BeforeReverseRecapitalizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Before reverse recapitalization.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities and Stockholders' Equity (Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-Based Payment Arrangement, Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Risk Free Interest Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk Free Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of stock price per unit and interest earned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of stock price per unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Purchase price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization consolidation and presentation of financial statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Consolidation And Presentation Of Financial Statements [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConvertedIntoEquityDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, converted into equity during period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConvertedIntoEquityDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, converted into equity during period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConvertedIntoEquityDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">SAFEs converted into equity during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantHoldersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public warrant holders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantHoldersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Warrant Holders [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicWarrantHoldersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Warrant Holders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExercisePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Exercise Price [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExercisePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeLocationBalanceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Location, Statement of Income, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accumulated Deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Change in Fair Value Of Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain loss on change in fair value of simple agreements for future equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToExercisePriceReset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value assumption time to exercise price reset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToExercisePriceReset_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption time to exercise price reset.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToExercisePriceReset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time to exercise price reset (years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Furniture and Fixtures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Income (Loss) Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossRelatedToLitigationSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) from Litigation Settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossRelatedToLitigationSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) from Litigation Settlement, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossRelatedToLitigationSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain from litigation settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred transaction costs included in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Transaction Costs Included In Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredTransactionCostsIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred transaction costs included in accounts payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToMaturity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time to maturity - years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToMaturity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assumption Time to maturity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionTimeToMaturity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption time to maturity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromIssuanceOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromIssuanceOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of simple agreements for future equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ProceedsFromIssuanceOfSimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CreditCardObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit card obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CreditCardObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Card Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CreditCardObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Credit card obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfClassesOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Classes Of Warrants Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfClassesOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of classes of warrants outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NumberOfClassesOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of classes of warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income (loss) per share:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Litigation settlement, loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement, Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assumption exercise price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assumption Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_FairValueAssumptionExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Undistributed earnings allocated to participating securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undistributed earnings allocated to participating securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple Agreements for Future Equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Simple Agreements for Future Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' Equity (Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_RedemptionRightsWithRespectToAggregateNumberOfPublicShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redemption rights with respect to aggregate number of public shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_RedemptionRightsWithRespectToAggregateNumberOfPublicShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redemption rights with respect to aggregate number of public shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_RedemptionRightsWithRespectToAggregateNumberOfPublicShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption rights with respect to aggregate number of public shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WeightedAverageWarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average warrant exercise price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WeightedAverageWarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average warrant exercise price per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WeightedAverageWarrantExercisePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Warrant Exercise Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_IncreaseDecreaseInDueFromStockholder_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Due from Stockholder</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_IncreaseDecreaseInDueFromStockholder_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease in due from stockholder.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_IncreaseDecreaseInDueFromStockholder_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Due from stockholder</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of SAFES Into Common Stock And Additional Paid-in Capital Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of SAFES into common stock and additional paid-in capital shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of SAFEs into common stock and additional paid-in capital, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Undistributed Earnings (Loss) Allocated to Participating Securities, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Undistributed Earnings (Loss) Allocated to Participating Securities, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Undistributed earnings allocated to participating securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsReclassifiedToAdditionalPaid-InCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Financing Costs Reclassified To Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsReclassifiedToAdditionalPaid-InCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred financing costs reclassified to additional paid-in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_DeferredFinancingCostsReclassifiedToAdditionalPaid-InCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs reclassified to additional paid-in capital, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simple agreements for future equity outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple agreements for future equity outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SAFEs outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SimpleAgreementsForFutureEquityIssued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simple agreements for future equity issued.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_SimpleAgreementsForFutureEquityIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Simple Agreements For Future Equity Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment arrangement, expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income (loss) before provision for income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NetCashSettlementValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net cash settlement value of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NetCashSettlementValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Settlement Value of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NetCashSettlementValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash settlement value of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Vested, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Vested, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSimpleAgreementsForFutureEquityIntoCommonStockAndAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Simple Agreements for Future Equity into Common Stock and Additional Paid In Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSimpleAgreementsForFutureEquityIntoCommonStockAndAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of simple agreements for future equity into common stock and additional paid in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ConversionOfSimpleAgreementsForFutureEquityIntoCommonStockAndAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of SAFEs into common stock and additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting Of Restricted Shares Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vesting of restricted shares value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_VestingOfRestrictedSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted shares, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance Lease, Liability, to be Paid, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OverAllotmentsOptionTopurchaseAdditionalPublicUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Over allotments option to purchase additional public units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OverAllotmentsOptionTopurchaseAdditionalPublicUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Over Allotments Option ToPurchase Additional Public Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_OverAllotmentsOptionTopurchaseAdditionalPublicUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option to purchase additional public units to cover over-allotments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase in cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodStartDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period Start Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income (loss) to net cash used in operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balances, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balances, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Unit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PublicUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recent Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercisable price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercise price of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected period for recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Amounts of Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related party transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use-asset obtained in exchange for lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-Use Asset Obtained in Exchange for Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Costs, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Costs, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PeriodAllottedToCompleteBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Period allotted to complete business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PeriodAllottedToCompleteBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period Allotted to Complete Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PeriodAllottedToCompleteBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period allotted to complete the business combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Unrecognized Tax Benefits, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Unrecognized Tax Benefits, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NonRedemptionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non-redemption agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NonRedemptionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">NonRedemption Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NonRedemptionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Redemption Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Settlement, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legal settlement, value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_LegalSettlementValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal settlement, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsAndRightsExercisePriceResetTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Exercise Price Reset Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsAndRightsExercisePriceResetTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants and rights exercise price reset term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsAndRightsExercisePriceResetTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time to exercise price reset - years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Computer Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computer Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationStatusAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Status [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants exercisable period after completion of business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Exercisable Period After Completion of Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsExercisablePeriodAfterCompletionOfBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period after business combination when warrants become exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Leases [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_WarrantsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Proceeds From Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares proceeds from business combination.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Business Combination, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash - end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash - beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfLegalSettlementLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of legal settlement liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfLegalSettlementLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss on Change in Fair Value of Legal Settlement Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_GainLossOnChangeInFairValueOfLegalSettlementLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain loss on change in fair value of legal settlement liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock shares exercisable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_CommonStockSharesExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock shares exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Operating Lease Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncash operating lease expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncash operating lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareReserveAutomaticallyIncreases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of share reserve automatically increases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareReserveAutomaticallyIncreases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Share Reserve Automatically Increases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PercentageOfShareReserveAutomaticallyIncreases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of share reserve automatically increases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PrivatePlacementWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Private Placement Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PrivatePlacementWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_PrivatePlacementWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Costs, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and Administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expenses, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class A Ordinary Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputImpliedRemainingTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Implied Remaining Term Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputImpliedRemainingTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement Input Implied Remaining Term Volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_MeasurementInputImpliedRemainingTermVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Implied Remaining Term Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Price Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of noncash transactions:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value Assumptions of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonvested Restricted Stock Shares Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of RSPAs Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccruedLegalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Legal Settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccruedLegalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued legal settlement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_AccruedLegalSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued legal settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PendingLitigationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pending Litigation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of Credit Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Property and equipment estmated useful life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Useful Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Change In Fair Value of Derivative Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Summary of Fair Value on Recurring Basis Using Significant Unobservable Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Additional Paid in Capital, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in-capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ScheduleOfReconciliationOfLiabilitiesMeasuredAtFairValueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Reconciliation of Liabilities Measured at Fair Value [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="hdrn_ScheduleOfReconciliationOfLiabilitiesMeasuredAtFairValueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of reconciliation of liabilities measured at fair value.</link:label>
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  <xsd:element id="hdrn_WarrantsTable" name="WarrantsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_MinimumPricePerShareRequiredForRedemptionOfWarrants" name="MinimumPricePerShareRequiredForRedemptionOfWarrants" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombination" name="StockIssuedDuringPeriodSharesProceedsFromBusinessCombination" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ReverseRecapitalizationAmount" name="ReverseRecapitalizationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalShares" name="ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquity" name="SimpleAgreementsForFutureEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_BusinessCombinationUnpaidTransactionCosts" name="BusinessCombinationUnpaidTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_AccruedLegalSettlement" name="AccruedLegalSettlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_RedemptionRightsWithRespectToAggregateNumberOfPublicShares" name="RedemptionRightsWithRespectToAggregateNumberOfPublicShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_PrivatePlacementWarrantsMember" name="PrivatePlacementWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityDisclosureAbstract" name="SimpleAgreementsForFutureEquityDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_NumberOfFractionalSharesIssuedUponExerciseOfPublicWarrants" name="NumberOfFractionalSharesIssuedUponExerciseOfPublicWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalShares" name="LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombination" name="StockIssuedDuringPeriodValueProceedsFromBusinessCombination" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_FairValueAssumptionImpliedRemainingTermVolatility" name="FairValueAssumptionImpliedRemainingTermVolatility" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_MinimumPeriodOfPriorWrittenNoticeOfRedemptionOfWarrants" name="MinimumPeriodOfPriorWrittenNoticeOfRedemptionOfWarrants" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityDisclosureTextBlock" name="SimpleAgreementsForFutureEquityDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" name="OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_DeferredTransactionCostsReclassifiedToAdditionalPaidInCapital" name="DeferredTransactionCostsReclassifiedToAdditionalPaidInCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_WarrantsRedemptionCovenantThresholdTradingPeriod" name="WarrantsRedemptionCovenantThresholdTradingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ScheduleOfReconciliationOfLiabilitiesMeasuredAtFairValueTableTextBlock" name="ScheduleOfReconciliationOfLiabilitiesMeasuredAtFairValueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_UnderwritingDiscountPerPublicUnitPaidInCash" name="UnderwritingDiscountPerPublicUnitPaidInCash" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_FairValueAssumptionsVolatilityRate" name="FairValueAssumptionsVolatilityRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_WarrantExerciseDescription" name="WarrantExerciseDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityAbstract" name="SimpleAgreementsForFutureEquityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_WarrantsExercisablePeriodAfterCompletionOfBusinessCombination" name="WarrantsExercisablePeriodAfterCompletionOfBusinessCombination" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ScheduleOfEstimatedFairValueOfDerivativeLiabilityBasedOnSignificantInputsAtIssuanceTableTextBlock" name="ScheduleOfEstimatedFairValueOfDerivativeLiabilityBasedOnSignificantInputsAtIssuanceTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_PublicUnitMember" name="PublicUnitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_DeferredFinancingCostsWrittenOffToAdditionalPaidInCapital" name="DeferredFinancingCostsWrittenOffToAdditionalPaidInCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_IncreaseDecreaseInDueFromStockholder" name="IncreaseDecreaseInDueFromStockholder" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_AccountingPoliciesTable" name="AccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_CommonStockIncludingPreferredStockSharesAuthorized" name="CommonStockIncludingPreferredStockSharesAuthorized" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_DeferredTransactionCostsIncludedInAccountsPayable" name="DeferredTransactionCostsIncludedInAccountsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_NoncashOperatingLeaseExpense" name="NoncashOperatingLeaseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_DeferredFinancingCostsReclassifiedToAdditionalPaid-InCapital" name="DeferredFinancingCostsReclassifiedToAdditionalPaid-InCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantLiabilitiesIssuedInConnectionWithBusinessCombinationValue" name="WarrantLiabilitiesIssuedInConnectionWithBusinessCombinationValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WeightedAverageWarrantExercisePricePerShare" name="WeightedAverageWarrantExercisePricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_StockIssuedDuringPeriodSharesProceedsFromBusinessCombinationNet" name="StockIssuedDuringPeriodSharesProceedsFromBusinessCombinationNet" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_LegalSettlementValue" name="LegalSettlementValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantExercisePricePerShare" name="WarrantExercisePricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_WarrantLiabilityNonCurrent" name="WarrantLiabilityNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantLiabilitiesIssuedInConnectionWithBusinessCombination" name="WarrantLiabilitiesIssuedInConnectionWithBusinessCombination" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_UnderwritersOverAllotmentOptionsPeriod" name="UnderwritersOverAllotmentOptionsPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConvertedIntoEquityDuringPeriod" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConvertedIntoEquityDuringPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityOutstanding" name="SimpleAgreementsForFutureEquityOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ReverseRecapitalization" name="ReverseRecapitalization" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ClassOfWarrantPerShareValue" name="ClassOfWarrantPerShareValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ThresholdPercentageToHoldNumberOfPublicSharesInExcessOfIfNumberOfPublicSharesOutstanding" name="ThresholdPercentageToHoldNumberOfPublicSharesInExcessOfIfNumberOfPublicSharesOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ExpectedSharesFromSAFENotesMember" name="ExpectedSharesFromSAFENotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_NumberOfWarrantsExercisable" name="NumberOfWarrantsExercisable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit" name="ConcentrationRiskCreditRiskCashAccountFdicCoverageLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_CommonWarrantsMember" name="CommonWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_MeasurementInputImpliedRemainingTermVolatilityMember" name="MeasurementInputImpliedRemainingTermVolatilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_PeriodAllottedToCompleteBusinessCombination" name="PeriodAllottedToCompleteBusinessCombination" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_OfficeSpaceMember" name="OfficeSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_PaymentOfDeferredCosts" name="PaymentOfDeferredCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantsDisclosureTextBlock" name="WarrantsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_NonvestedRestrictedStockSharesActivityAbstract" name="NonvestedRestrictedStockSharesActivityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_ProceedsFromBusinessCombinationNetFinancingActivities" name="ProceedsFromBusinessCombinationNetFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_NonRedemptionAgreementsMember" name="NonRedemptionAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_ClassOfWarrantOrRightRedemptionPrice" name="ClassOfWarrantOrRightRedemptionPrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_MeasurementInputShortTermVolatilityMember" name="MeasurementInputShortTermVolatilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_FormerEmployeeRelatedMember" name="FormerEmployeeRelatedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_WarrantExercised" name="WarrantExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_WarrantsRedemptionCovenantThresholdConsecutiveTradingPeriod" name="WarrantsRedemptionCovenantThresholdConsecutiveTradingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalValue" name="LegalSettlementLiabilityConvertedIntoCommonStockAndAdditionalPaid-InCapitalValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_BusinessCombinationExchangeRatio" name="BusinessCombinationExchangeRatio" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_FairValueAssumptionExercisePrice" name="FairValueAssumptionExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity" name="GainLossOnChangeInFairValueOfSimpleAgreementsForFutureEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_PublicOfferingDisclosureTextBlock" name="PublicOfferingDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ProceedsFromIssuanceOfSimpleAgreementsForFutureEquity" name="ProceedsFromIssuanceOfSimpleAgreementsForFutureEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_ExchangedOptionsMember" name="ExchangedOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_GainLossOnChangeInFairValueOfLegalSettlementLiability" name="GainLossOnChangeInFairValueOfLegalSettlementLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_VestingOfRestrictedSharesValue" name="VestingOfRestrictedSharesValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantsLineItems" name="WarrantsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_NetCashSettlementValueOfWarrants" name="NetCashSettlementValueOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityIssued" name="SimpleAgreementsForFutureEquityIssued" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_ConversionOfSimpleAgreementsForFutureEquityIntoCommonStockAndAdditionalPaidInCapital" name="ConversionOfSimpleAgreementsForFutureEquityIntoCommonStockAndAdditionalPaidInCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_LeaseBaseRent" name="LeaseBaseRent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="hdrn_WarrantsAndRightsExercisePriceResetTerm" name="WarrantsAndRightsExercisePriceResetTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_CommonStockSharesExercised" name="CommonStockSharesExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_VestingOfRestrictedSharesShares" name="VestingOfRestrictedSharesShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_UnvestedSharesOfRestrictedStockPurchaseAgreementsMember" name="UnvestedSharesOfRestrictedStockPurchaseAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_PublicWarrantHoldersMember" name="PublicWarrantHoldersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_CreditCardObligations" name="CreditCardObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_GigCapital7Member" name="GigCapital7Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_SponsorMember" name="SponsorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalValue" name="ConversionOfSAFESIntoCommonStockAndAdditionalPaid-InCapitalValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_WarrantsExercisableExpirationPeriodAfterCompletionOfBusinessCombination" name="WarrantsExercisableExpirationPeriodAfterCompletionOfBusinessCombination" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_FairValueAssumptionRiskFreeInterestRate" name="FairValueAssumptionRiskFreeInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_UnderwritersOverAllotmentOptionsExpirationDate" name="UnderwritersOverAllotmentOptionsExpirationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_WarrantsExercisablePeriodFromClosingOfOffering" name="WarrantsExercisablePeriodFromClosingOfOffering" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_StockIssuedDuringPeriodValueProceedsFromBusinessCombinationNet" name="StockIssuedDuringPeriodValueProceedsFromBusinessCombinationNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="hdrn_ScheduleOfFairValueOfWarrantsEstimatedUsingAssumptionsTableTextBlock" name="ScheduleOfFairValueOfWarrantsEstimatedUsingAssumptionsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_NumberOfClassesOfWarrantsOutstanding" name="NumberOfClassesOfWarrantsOutstanding" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_SimpleAgreementsForFutureEquityPolicyPolicyTextBlock" name="SimpleAgreementsForFutureEquityPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_FairValueAssumptionShortTermVolatility" name="FairValueAssumptionShortTermVolatility" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_PublicWarrantsMember" name="PublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="hdrn_OverAllotmentsOptionTopurchaseAdditionalPublicUnits" name="OverAllotmentsOptionTopurchaseAdditionalPublicUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="hdrn_CommonStockSharesExercisable" name="CommonStockSharesExercisable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
