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| <link:definition> 11101 - Disclosure - INCOME TAXES </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureDefinedContributionPlan" id="DisclosureDefinedContributionPlan"> |
| <link:definition> 11201 - Disclosure - DEFINED CONTRIBUTION PLAN </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies"> |
| <link:definition> 11301 - Disclosure - COMMITMENTS AND CONTINGENCIES </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureEnterpriseWideDisclosures" id="DisclosureEnterpriseWideDisclosures"> |
| <link:definition> 11401 - Disclosure - ENTERPRISE-WIDE DISCLOSURES </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/20220331/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" id="DisclosureSignificantAccountingPoliciesPolicies"> |
| <link:definition> 20202 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureSupplementalBalanceSheetDisclosuresTables" id="DisclosureSupplementalBalanceSheetDisclosuresTables"> |
| <link:definition> 30403 - Disclosure - SUPPLEMENTAL BALANCE SHEET DISCLOSURES (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureLeasesTables" id="DisclosureLeasesTables"> |
| <link:definition> 30503 - Disclosure - LEASES (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureIntangibleAssetsTables" id="DisclosureIntangibleAssetsTables"> |
| <link:definition> 30603 - Disclosure - INTANGIBLE ASSETS (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureBasicAndDilutedLossPerShareTables" id="DisclosureBasicAndDilutedLossPerShareTables"> |
| <link:definition> 31003 - Disclosure - BASIC AND DILUTED LOSS PER SHARE (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureIncomeTaxesTables" id="DisclosureIncomeTaxesTables"> |
| <link:definition> 31103 - Disclosure - INCOME TAXES (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureEnterpriseWideDisclosuresTables" id="DisclosureEnterpriseWideDisclosuresTables"> |
| <link:definition> 31403 - Disclosure - ENTERPRISE-WIDE DISCLOSURES (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureDescriptionOfBusinessDetails" id="DisclosureDescriptionOfBusinessDetails"> |
| <link:definition> 40101 - Disclosure - DESCRIPTION OF BUSINESS (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType roleURI="http://www.heliusmedical.com/20220331/taxonomy/role/DisclosureStockBasedCompensationSummaryOfCompanySStockOptionActivityDetails" id="DisclosureStockBasedCompensationSummaryOfCompanySStockOptionActivityDetails"> |
| <link:definition> 40903 - Disclosure - STOCK-BASED COMPENSATION - Summary of Company's Stock Option Activity (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureBasicAndDilutedLossPerShareDetails" id="DisclosureBasicAndDilutedLossPerShareDetails"> |
| <link:definition> 41001 - Disclosure - BASIC AND DILUTED LOSS PER SHARE (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureDefinedContributionPlanDetails" id="DisclosureDefinedContributionPlanDetails"> |
| <link:definition> 41201 - Disclosure - DEFINED CONTRIBUTION PLAN (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="hsdt-20221231_pre.xml" xlink:title="Presentation Links, all" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="hsdt-20221231_cal.xml" xlink:title="Calculation Links, all" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="hsdt-20221231_def.xml" xlink:title="Definition Links, all" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="hsdt-20221231_lab.xml" xlink:title="Label Links, all" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:roleType roleURI="http://www.heliusmedical.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults"> |
| <link:definition> 99900 - Disclosure - Standard And Custom Axis Domain Defaults </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | </xsd:appinfo> |
| | </xsd:annotation> |
| <xsd:import namespace="http://xbrl.sec.gov/currency/2022" schemaLocation="https://xbrl.sec.gov/currency/2022/currency-2022.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/country/2022" schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/> |
| <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/dei/2022" schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/> |
| <xsd:import namespace="http://fasb.org/srt/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd"/> |
| <xsd:import namespace="http://fasb.org/us-gaap/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd"/> |
| <xsd:import namespace="http://fasb.org/us-roles/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd"/> |
| <xsd:element name="ForeignCurrencyTransactionIncludingOtherGainLossBeforeTax" id="hsdt_ForeignCurrencyTransactionIncludingOtherGainLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element name="StockIssuedDuringPeriodSharesWarrantExercised" id="hsdt_StockIssuedDuringPeriodSharesWarrantExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="StockIssuedDuringPeriodValueWarrantExercised" id="hsdt_StockIssuedDuringPeriodValueWarrantExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element name="ProceedsFromExerciseOfWarrantsAndStockOptions" id="hsdt_ProceedsFromExerciseOfWarrantsAndStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element name="ShareIssuanceCostsIncludedInAccountsPayableAndAccruedLiabilities" id="hsdt_ShareIssuanceCostsIncludedInAccountsPayableAndAccruedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element name="RisksAndUncertaintiesPolicyTextBlock" id="hsdt_RisksAndUncertaintiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="EmployeeAndDirectorStockOptionsMember" id="hsdt_EmployeeAndDirectorStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="LesseeOperatingLeaseInformationIncludingMaturityTableTextBlock" id="hsdt_LesseeOperatingLeaseInformationIncludingMaturityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ScheduleOfSignificantAccountingPoliciesLineItems" id="hsdt_ScheduleOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ScheduleOfSignificantAccountingPoliciesTable" id="hsdt_ScheduleOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ComputerSoftwareAndHardwareMember" id="hsdt_ComputerSoftwareAndHardwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="HealthTechConnexIncorporationMember" id="hsdt_HealthTechConnexIncorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ClinicalResearchAndCoPromotionAgreementMember" id="hsdt_ClinicalResearchAndCoPromotionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="AcquiredProprietarySoftwareMember" id="hsdt_AcquiredProprietarySoftwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ReacquiredRightsMember" id="hsdt_ReacquiredRightsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="NumberOfDevicesResultedInRecognitionOfRevenue" id="hsdt_NumberOfDevicesResultedInRecognitionOfRevenue" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="LicenseRevenueTermOfAgreement" id="hsdt_LicenseRevenueTermOfAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ScheduleOfStockholdersEquityLineItems" id="hsdt_ScheduleOfStockholdersEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ScheduleOfStockholdersEquityTable" id="hsdt_ScheduleOfStockholdersEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="FebruaryTwoThousandTwentyOneOfferingMember" id="hsdt_FebruaryTwoThousandTwentyOneOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="LincolnParkPurchaseAgreementMember" id="hsdt_LincolnParkPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="NovemberTwoThousandTwentyOneOfferingMember" id="hsdt_NovemberTwoThousandTwentyOneOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ClassOfWarrantOrRightExercised" id="hsdt_ClassOfWarrantOrRightExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ClassOfWarrantsOrRightExpirationPeriod" id="hsdt_ClassOfWarrantsOrRightExpirationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ProceedsFromIssuanceOfCommonStockNet" id="hsdt_ProceedsFromIssuanceOfCommonStockNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element name="FairValueOfWarrantsAtIssuance" id="hsdt_FairValueOfWarrantsAtIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element name="FairValueOfCommitmentFeeAmount" id="hsdt_FairValueOfCommitmentFeeAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element name="TwoThousandTwentyOneInducementPlanMember" id="hsdt_TwoThousandTwentyOneInducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="AccruedFranchiseFeeCurrent" id="hsdt_AccruedFranchiseFeeCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/> |
| <xsd:element name="PercentageOfRoyaltyOnNetRevenue" id="hsdt_PercentageOfRoyaltyOnNetRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="CommitmentsAndContingenciesLineItems" id="hsdt_CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="CommitmentsAndContingenciesTable" id="hsdt_CommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="AdvancedNeuroRehabilitationLimitedLiabilityCompanyMember" id="hsdt_AdvancedNeuroRehabilitationLimitedLiabilityCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="LicenseAgreementForExclusiveRightsOnPatentPendingTechnologyMember" id="hsdt_LicenseAgreementForExclusiveRightsOnPatentPendingTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsShares" id="hsdt_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ClassOfWarrantOrRightExpired" id="hsdt_ClassOfWarrantOrRightExpired" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="SupplementalBalanceSheetDisclosuresAbstract" id="hsdt_SupplementalBalanceSheetDisclosuresAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="StockIssuedDuringPeriodValueEquityLineOfCredit" id="hsdt_StockIssuedDuringPeriodValueEquityLineOfCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="StockIssuedDuringPeriodSharesEquityLineOfCredit" id="hsdt_StockIssuedDuringPeriodSharesEquityLineOfCredit" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="NumberOfOperatingLeases" id="hsdt_NumberOfOperatingLeases" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false"/> |
| <xsd:element name="InventoryReservesChargedAgainstWorkInProcessInventory" id="hsdt_InventoryReservesChargedAgainstWorkInProcessInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit"/> |
| <xsd:element name="DeferredLicenseRevenueNotYetRecognized" id="hsdt_DeferredLicenseRevenueNotYetRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="DeferredRevenueProductSales" id="hsdt_DeferredRevenueProductSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="DeferredRevenueRecognizedProductSales" id="hsdt_DeferredRevenueRecognizedProductSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="EquityIncentive2022PlanMember" id="hsdt_EquityIncentive2022PlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="MaximumNumberOfSharesOfCommonStockThatMayBeIssuedOnExerciseOfIncentiveStockOptions" id="hsdt_MaximumNumberOfSharesOfCommonStockThatMayBeIssuedOnExerciseOfIncentiveStockOptions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false"/> |
| <xsd:element name="PreFundedWarrantsMember" id="hsdt_PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="PublicWarrantsMember" id="hsdt_PublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="SaleOfStockCombinedOfferingPricePerShare" id="hsdt_SaleOfStockCombinedOfferingPricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false"/> |
| <xsd:element name="SaleOfStockPreFundedWarrantsAndAccompanyingPublicWarrantsPricePerShare" id="hsdt_SaleOfStockPreFundedWarrantsAndAccompanyingPublicWarrantsPricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false"/> |
| <xsd:element name="PublicOfferingMember" id="hsdt_PublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="CommonStockWarrantsMember" id="hsdt_CommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="IncomeTaxReconciliationChangeInDerivativeLiability" id="hsdt_IncomeTaxReconciliationChangeInDerivativeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element name="IncomeTaxesTable" id="hsdt_IncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="IncomeTaxesLineItems" id="hsdt_IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="LincolnParkCapitalFundLLCMember" id="hsdt_LincolnParkCapitalFundLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="ScheduleOfWeightedAverageAssumptionsUsedForFairValueOfWarrantsTableTextBlock" id="hsdt_ScheduleOfWeightedAverageAssumptionsUsedForFairValueOfWarrantsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/> |
| <xsd:element name="NonCashShareIssuanceCosts" id="hsdt_NonCashShareIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element name="ShareBasedCompensationAnnualIncreaseInAuthorizedSharesAsPercentageOfFullyDilutedSharesOfCommonStockOutstanding" id="hsdt_ShareBasedCompensationAnnualIncreaseInAuthorizedSharesAsPercentageOfFullyDilutedSharesOfCommonStockOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="CashPaidShareIssuanceCostsAllocatedBetweenEquityAndDerivativeLiability" id="hsdt_CashPaidShareIssuanceCostsAllocatedBetweenEquityAndDerivativeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="ProceedsFromNewIssuanceAllocatedBetweenEquityAndDerivativeLiability" id="hsdt_ProceedsFromNewIssuanceAllocatedBetweenEquityAndDerivativeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit"/> |
| <xsd:element name="AugustTwoThousandTwentyTwoOfferingMember" id="hsdt_AugustTwoThousandTwentyTwoOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValuePerShare" id="hsdt_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValuePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="AccruedAndOtherCurrentLiabilities." id="hsdt_AccruedAndOtherCurrentLiabilities." type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="InventoryRelatedAssetsCurrent" id="hsdt_InventoryRelatedAssetsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit"/> |
| <xsd:element name="ScheduleOfAccruedAndOtherCurrentLiabilitiesTableTextBlock" id="hsdt_ScheduleOfAccruedAndOtherCurrentLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="ExclusivityRightsInitialTerm" id="hsdt_ExclusivityRightsInitialTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="ExclusivityRightsNumberOfAdditionalTerms" id="hsdt_ExclusivityRightsNumberOfAdditionalTerms" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="ExclusivityRightsAdditionalTerm" id="hsdt_ExclusivityRightsAdditionalTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="ExclusivityRightsPeriodOfWrittenNoticeForRenewal" id="hsdt_ExclusivityRightsPeriodOfWrittenNoticeForRenewal" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExpectedVolatilitiesAssumptionTradingHistoryPeriod" id="hsdt_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpectedVolatilitiesAssumptionTradingHistoryPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="DefinedContributionPlanFirstEmployerMatchingContributionPercentOfEmployeesGrossPay" id="hsdt_DefinedContributionPlanFirstEmployerMatchingContributionPercentOfEmployeesGrossPay" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="DefinedContributionPlanNextEmployerMatchingContributionPercentOfEmployeesGrossPay" id="hsdt_DefinedContributionPlanNextEmployerMatchingContributionPercentOfEmployeesGrossPay" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false"/> |
| <xsd:element name="CustomerOneMember" id="hsdt_CustomerOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="CustomerTwoMember" id="hsdt_CustomerTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="DeferredTaxAssetsLeaseLiability" id="hsdt_DeferredTaxAssetsLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit"/> |
| <xsd:element name="DeferredTaxLiabilitiesRightOfUseAssets" id="hsdt_DeferredTaxLiabilitiesRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="ExpirationPeriodAxis" id="hsdt_ExpirationPeriodAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="ExpirationPeriodDomain" id="hsdt_ExpirationPeriodDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="IndefiniteOneMember" id="hsdt_IndefiniteOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="OperatingLossCarryforwardExpirationPeriod1Member" id="hsdt_OperatingLossCarryforwardExpirationPeriod1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="OperatingLossCarryforwardExpirationPeriod2Member" id="hsdt_OperatingLossCarryforwardExpirationPeriod2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="TaxCreditCarryforwardExpirationPeriod1Member" id="hsdt_TaxCreditCarryforwardExpirationPeriod1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="TaxCreditCarryforwardExpirationPeriod2Member" id="hsdt_TaxCreditCarryforwardExpirationPeriod2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="ExclusiveDistributionAgreementMember" id="hsdt_ExclusiveDistributionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true"/> |
| <xsd:element name="UpFrontPaymentReceived" id="hsdt_UpFrontPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit"/> |
| <xsd:element name="ExclusivityRightGrantedValue" id="hsdt_ExclusivityRightGrantedValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit"/> |
| </xsd:schema> |