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          <link:loc xlink:type="locator" xlink:href="drttf-20260630.xsd#drttf_ContractWithCustomerLiabilityCustomerDeposits" xlink:label="drttf_ContractWithCustomerLiabilityCustomerDeposits"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingChangesAndErrorCorrectionsAbstract" xlink:label="us-gaap_AccountingChangesAndErrorCorrectionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="drttf-20260630.xsd#drttf_EmployeeRetentionCreditBalance" xlink:label="drttf_EmployeeRetentionCreditBalance"/>
          <link:loc xlink:type="locator" xlink:href="drttf-20260630.xsd#drttf_UndiscountedOperatingLeaseLiability" xlink:label="drttf_UndiscountedOperatingLeaseLiability"/>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="us-gaap_LongTermPurchaseCommitmentTable"/>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
          <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.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentContractMember" xlink:label="us-gaap_GovernmentContractMember"/>
          <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_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BASIS OF PRESENTATION</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Presentation and Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gross profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Gross Profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">REORGANIZATION</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Capital Shares Reserved for Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InventoryAndPropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory And Property Plant And Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InventoryAndPropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory And Property Plant And Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InventoryAndPropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Inventory And Property Plant And Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentyFive-JanuaryThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">January First Two Thousand Twenty Five - January Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentyFive-JanuaryThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">January First Two Thousand Twenty Five - January Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentyFive-JanuaryThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 1, 2025 - January 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Current Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Purchase Obligation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase obligation, outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility, basis spread on variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Basis Spread on Variable Rate</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</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/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">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/verboseLabel">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Included from Computation of Earnings Per Share, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Antidilutive Securities Included from Computation of Earnings Per Share, Amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities included from calculation of net income (loss) per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfIncomeTaxLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Income Tax [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfIncomeTaxLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Income Tax [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfIncomeTaxLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Income Tax Line Items</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="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="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">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/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsRelatedToWarranties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments related to warranties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsRelatedToWarranties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments Related To Warranties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsRelatedToWarranties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments related to warranties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Price Range [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letter of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoAndTwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 and 2022 PRSUs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoAndTwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Two And Two Thousand Twenty One Performance Based Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoAndTwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty two and two thousand twenty one performance-based restricted stock units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">% of PRSUs vesting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage</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">Common 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/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/verboseLabel">Common shares, issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Trade and accrued receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts and other receivables, net, current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts and Other Receivables, Net, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and accrued receivables, net of expected credit losses of $0.1 million at June 30, 2026 and December 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Face Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument lending amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TotalNumberOfSharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total Number Of Shares Purchased As Part Of Publicly Announced Programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TotalNumberOfSharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Total Number Of Shares Purchased As Part Of Publicly Announced Programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TotalNumberOfSharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total number of shares purchased as part of publicly announced programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UnusualRiskOrUncertaintyImpactTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unusual Risk Or Uncertainty Impact Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UnusualRiskOrUncertaintyImpactTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unusual Risk Or Uncertainty Impact Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdditionsToWarrantyProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions to warranty provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdditionsToWarrantyProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additions To Warranty Provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdditionsToWarrantyProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additions to warranty provision.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans, Notes, Trade and Other Receivables Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TRADE AND ACCRUED RECEIVABLES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayments of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal repayment debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted Share Units ("RSUs") Performance-Based [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Share Units ("RSUs") [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units (RSUs) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range $6.01 to $7.00 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Of Exercise Prices For Outstanding Share Options Seven [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range Of Exercise Prices For Outstanding Share Options seven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseCurrentPortionOfLongTermDebtAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current portion of long-term debt and accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseCurrentPortionOfLongTermDebtAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease Current Portion Of Long Term Debt And Accrued Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseCurrentPortionOfLongTermDebtAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease current portion of long-term debt and accrued interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UsDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">US Dollar Advances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UsDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Us Dollar Advances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UsDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">U.S. dollar advances.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayments of Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset, Impairment Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment charge on Rock Hill Facility (as defined in Note 4)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility, maximum borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Authority, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Authority, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Capitalized Computer Software, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Capitalized Computer Software, Net, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Capitalized Computer Software, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capitalized software, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedComputerSoftwareNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capitalized Cost, Software to be Sold, Leased, or Marketed, after Accumulated Amortization</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/terseLabel">Subsequent Event Type</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="us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Held-for-Sale, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtMaturitiesRepaymentsOfPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtMaturitiesRepaymentsOfPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtMaturitiesRepaymentsOfPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Long Term Debt Maturities Repayments Of Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cost of Goods and Services Sold, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total cost of sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Product and Service Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cost of sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued On Rights Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issued On Rights Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOffering_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net proceeds received from rights offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued on Rights Offering (as defined in Note 15)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LiborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LIBOR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LiborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LIBOR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LiborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIBOR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PledgingPurposeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pledging Purpose [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range $6.01 to $7.00 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range of Exercise Prices Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range of Exercise Prices Three [Member]</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">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/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/2009/role/negatedLabel">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FurtherAnticipatedReorganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Further anticipated reorganization costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FurtherAnticipatedReorganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Further Anticipated Reorganization Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FurtherAnticipatedReorganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Further anticipated reorganization costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseSubordinatedNotesAndDebentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Subordinated Notes and Debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseSubordinatedNotesAndDebentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest on convertible debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AugustFirstTwoThousandTwentyFive-AugustThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August First Two Thousand Twenty Five - August Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AugustFirstTwoThousandTwentyFive-AugustThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">August First Two Thousand Twenty Five - August Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AugustFirstTwoThousandTwentyFive-AugustThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 1, 2025 - August 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Award Tranche Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche four.</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/terseLabel">General and administrative</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_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_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program, Remaining Authorized, Number of Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares repurchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shareholders' Equity and Share-Based Payments [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SHARE REPURCHASES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Accounting Pronouncements Or Change In Accounting Principle [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update and Change in Accounting Principle [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RIGHTS OFFERING</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rights Offering [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of rights offering [Text Block]</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_VestingAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Gains (Losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other (expenses)/income and (losses)/gains</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 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 (U.S. dollars) - basic (as on the Consolidated Statement of Operations)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</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="us-gaap_ProceedsFromSaleOfPropertyHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale, Property, Held-for-Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds on sale of assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyHeldForSale_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from sale of assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyHeldForSale_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyHeldForSale_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Proceeds from sale of assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Maximum Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Maximum Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share repurchase maximum shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_OverdueReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Overdue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_OverdueReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Overdue Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_OverdueReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Overdue receivables.</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">Purchase of property, plant and equipment, net of accounts payable changes</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_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range of exercise prices, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentOfTradeAccountsReceivableInsured_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percent of trade accounts receivable insured</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentOfTradeAccountsReceivableInsured_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percent Of Trade Accounts Receivable Insured</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentOfTradeAccountsReceivableInsured_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percent of trade accounts receivable insured</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="drttf_EducationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Education [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EducationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Education [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EducationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Education.</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">Prepaids and other current assets</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="drttf_WeightedAveragePerShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Per Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WeightedAveragePerShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted Average Per Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipalBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchased For Cancellation Of Prinicipal Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipalBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchased For Cancellation Of Prinicipal Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipalBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchased for cancellation of the principal balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ADOPTION OF NEW AND REVISED ACCOUNTING STANDARDS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update and Change in Accounting Principle [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GovernmentSubsidiesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government subsidies received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GovernmentSubsidiesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Government Subsidies Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GovernmentSubsidiesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Government Subsidies Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MonteCarloValuationMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monte Carlo Valuation Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MonteCarloValuationMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Monte Carlo Valuation Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MonteCarloValuationMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Monte Carlo Valuation Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchased For Cancellation Of Prinicipal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipal_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchased For Cancellation Of Prinicipal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RepurchasedForCancellationOfPrinicipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchased For Cancellation</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/terseLabel">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_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_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Convertible Principal Amount Of Debentures As Basis For Conversion Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument convertible, principal amount of debentures as basis for conversion rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Convertible debentures, principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockNoParValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, no par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockNoParValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, No Par Value</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="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="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="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesIssuableOnDebetutresPrincipalAmountSettledInCommonSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Issuable on Debetutres Principal Amount Settled in Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesIssuableOnDebetutresPrincipalAmountSettledInCommonSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issuable on Debetutres Principal Amount Settled in Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesIssuableOnDebetutresPrincipalAmountSettledInCommonSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares Issuable on Debetutres Principal Amount Settled in Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, frequency of interest payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Frequency of Periodic Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Restructuring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Share Units ("DSUs") [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Share Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Share Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock-Based Compensation Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]</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">Options, Grants in Period</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="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnSaleOfSoftwareAndPatentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GAIN ON SALE OF SOFTWARE AND PATENTS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnSaleOfSoftwareAndPatentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain on Sale of Software and Patents [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnSaleOfSoftwareAndPatentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain on Sale of Software and Patents [Text Block]</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="drttf_CancelledFromNormalCourseIssuerBid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cancelled from Normal Course Issuer Bid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CancelledFromNormalCourseIssuerBid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cancelled from Normal Course Issuer Bid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CancelledFromNormalCourseIssuerBid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled from Shares NCIB and Share Repurchase (each as defined in Note 9)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Held-for-Sale [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total product revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds received on long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Issuance of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwentyTwoNwFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">22NW Fund, LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwentyTwoNwFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Two NW Fund LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwentyTwoNwFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty Two NW Fund LP Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfCountriesInWhichEntityOperates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of principal geographic locations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfCountriesInWhichEntityOperates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Countries in which Entity Operates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GENERAL INFORMATION</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of disaggregation of revenue by major products and services lines and timing of revenue recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument periodic payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Periodic Payment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentySix-JuneThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June First Two Thousand Twenty Six - June Thirty Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentySix-JuneThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June First Two Thousand Twenty Six - June Thirty Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentySix-JuneThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 1, 2026 - June 30, 2026</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 Shareholders&#8217; Equity</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">Beginning Balance</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">Ending Balance</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_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_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_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</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="drttf_ShareAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share awards.</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="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_TaxesPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxesPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Taxes Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxesPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Taxes Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NewRBCFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">New RBC facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NewRBCFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New R B C Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NewRBCFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New RBC Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EARNINGS (LOSS) PER SHARE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Category of Item Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Category of Item Purchased [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentySix-JanuaryThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">January First Two Thousand Twenty Six - January Thirty First Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentySix-JanuaryThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">January First Two Thousand Twenty Six - January Thirty First Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryFirstTwoThousandTwentySix-JanuaryThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 1, 2026 - January 31, 2026</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 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/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</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 measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOfferingInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issued On Rights Offering (In Shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOfferingInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued On Rights Offering (In Shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IssuedOnRightsOfferingInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued on Rights Offering (as defined in Note 15) (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromRecoveryOfSoftwareDevelopmentExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recovery of software development expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromRecoveryOfSoftwareDevelopmentExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Recovery Of Software Development Expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromRecoveryOfSoftwareDevelopmentExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds From Recovery Of Software Development Expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long-Term Debt, Average Amount Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Long term debt, Balance Ending</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Long term debt, Balance Beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LeasingFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasing Facilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LeasingFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leasing Facilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LeasingFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leasing facilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LinesOfCreditCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasing facility drawn,</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LinesOfCreditCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Repayments of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Principal repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal repayment through the Issuer Bid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contractual Obligation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undiscounted rent obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument floating interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EstimatedClaimsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Estimated claims payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EstimatedClaimsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Claims Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EstimatedClaimsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated claims payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Maturities of Long-Term Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Principal Maturities Of The BDC Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</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_ComprehensiveIncomeNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnExtinguishmentOfCobertibleDebenturesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain On Extinguishment Of Cobertible Debentures Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnExtinguishmentOfCobertibleDebenturesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain On Extinguishment Of Cobertible Debentures Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnExtinguishmentOfCobertibleDebenturesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GAIN ON EXTINGUISHMENT OF CONVERTIBLE DEBENTURES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</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="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Costs [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Restructuring costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExchangeDifferencesAdjustmentToDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exchange Differences Adjustment To Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExchangeDifferencesAdjustmentToDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exchange differences adjustment to debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExchangeDifferencesAdjustmentToDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extinguishment of convertible debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExchangeDifferencesAdjustmentToDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exchange differences</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromEmployeeTaxPaymentsOnVestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee tax payments on vesting of RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromEmployeeTaxPaymentsOnVestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Employee Tax Payments On Vesting Of Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProceedsFromEmployeeTaxPaymentsOnVestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from employee tax payments on vesting of restricted stock units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Extinguishment of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on extinguishment of convertible debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain on extinguishment of convertible debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on extinguishment of convertible debt</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 shares, unlimited authorized without par value, 194,332,596 issued and outstanding at June 30, 2026 and 191,912,548 issued and outstanding at December 31, 2025</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 Earnings (Loss) Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DecemberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">December [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DecemberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">December [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DecemberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TechnologyAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Technology and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TechnologyAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Technology And Development Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TechnologyAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Technology And Development Expenses.</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_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_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Foreign Currency Transaction Gain (Loss), before Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign exchange gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParticipatingMortgageLoansMortgageObligationsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Participating Mortgage Loans, Mortgage Obligations, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParticipatingMortgageLoansMortgageObligationsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument mortgage amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DSU liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Share Unit Liability Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DeferredShareUnitLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred share unit liability current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation allowance against Deferred Tax Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Valuation Allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentySix-MayThirtyOneTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 1, 2026 - May 31, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentySix-MayThirtyOneTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May First Two Thousand Twenty Six - May Thirty One Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentySix-MayThirtyOneTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May First Two Thousand Twenty Six - May Thirty One Two Thousand Twenty Six [Member]</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/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/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AcceleratedShareRepurchasesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Share Repurchases [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forfeited or expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range of exercise prices, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on disposal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Property Plant Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Property Plant Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentySix-FebruaryTwentyEightTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February First Two Thousand Twenty Six - February Twenty Eight Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentySix-FebruaryTwentyEightTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">February First Two Thousand Twenty Six - February Twenty Eight Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentySix-FebruaryTwentyEightTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 1, 2026 - February 28, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestPayableExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest Payable Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestPayableExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestPayableExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Paid interest payable</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/terseLabel">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="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_StockGrantedDuringPeriodValueSharebasedCompensationForfeited_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted, Value, Share-Based Payment Arrangement, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationForfeited_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Granted, Value, Share-Based Payment Arrangement, Forfeited</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">Deemed 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">Weighted average fair value of the RSUs granted</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_VestingDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WarrantyAndOtherProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WarrantyAndOtherProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WarrantyAndOtherProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warranty provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WarrantyAndOtherProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warranty And Other Provisions Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_WarrantyAndOtherProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warranty and other provisions current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Line Items]</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>
          <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_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation arrangement by share-based payment award, award requisite service period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Convertible Debt Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Issuable on Principal Amount Settled in Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Debt Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Share Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Share Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareRepurchase_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Common share repurchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOther_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Withheld to settle employee tax obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock granted for service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Issued for Services</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_ProceedsFromIssuanceOfUnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of convertible debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Unsecured Debt</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 EVENT</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_LongTermDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LONG-TERM DEBT</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of foreign exchange on cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of Exchange Rate on 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_IncomeTaxExpenseBenefitContinuingOperationsAbstract_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_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit), Continuing Operations [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DebtInstrumentConversionConvertedInstrumentSharesIssuedForBasisPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, common shares issued</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_VestingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting Term</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NewDeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">New Deferred Share Units [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MarchFirstTwoThousandTwentyFive-MarchThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">March First Two Thousand Twenty Five - March Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MarchFirstTwoThousandTwentyFive-MarchThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March 1, 2025 - March 31, 2025</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance</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">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IntellectualPropertyRightsInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Intellectual property rights interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IntellectualPropertyRightsInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intellectual property rights interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IntellectualPropertyRightsInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intellectual property rights interest</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 Shareholders&#8217; Equity</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AssetsHeldForSaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets Held For Sale [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AssetsHeldForSaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Held For Sale [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AssetsHeldForSaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets Held For Sale [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of sales by industry</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Description of Variable Rate Basis</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RockHillFacilityClosureOfOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rock Hill Facility Closure Of Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RockHillFacilityClosureOfOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rock Hill Facility Closure Of Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RockHillFacilityClosureOfOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rock Hill Facility closure of operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</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="drttf_PercentageOfIssuedAndOutstandingShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Issued And Outstanding Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentageOfIssuedAndOutstandingShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Issued And Outstanding Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentageOfIssuedAndOutstandingShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Issued And Outstanding Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Canada [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CANADA</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfIncomeTaxTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Income Tax Table</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentyFive-AprilThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 1, 2025 - April 30, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentyFive-AprilThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">April First Two Thousand Twenty Five - April Thirty Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentyFive-AprilThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">April First Two Thousand Twenty Five - April Thirty Two Thousand Twenty Five [Member]</link:label>
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          <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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdvancesTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Advances Type</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reconciliation [Member]</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_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_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2024LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Granted Under The Two Thousand Twenty Four LTIP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2024LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted Under The 2024 LTIP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2024LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Granted Under The Two Thousand Twenty Four LTIP [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 Shares</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_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update and Change in Accounting Principle [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</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_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options outstanding, Weighted average remaining life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted-Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount</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">SHAREHOLDERS&#8217; EQUITY</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_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">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/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/terseLabel">Weighted average number of shares outstanding (thousands of shares)</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="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_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable and Accrued Liabilities, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</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="drttf_OperationSupportExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operations support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_OperationSupportExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operation Support Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_OperationSupportExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operation Support Expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restructuring charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restructuring Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reorganization</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_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</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="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Quarterly Report</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_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransportationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transportation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransportationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransportationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transportation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JulyFirstTwoThousandTwentyFive-JulyThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 1, 2025 - July 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JulyFirstTwoThousandTwentyFive-JulyThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">July First Two Thousand Twenty Five - July Thirty First Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JulyFirstTwoThousandTwentyFive-JulyThirtyFirstTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">July First Two Thousand Twenty Five - July Thirty First Two Thousand Twenty Five [Member]</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 flows provided by (used in) operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</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="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/verboseLabel">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/terseLabel">Net loss per share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Awards were issued to employees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period</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 loss after tax</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_ProvisionForOtherCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Provision for Other Credit Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForOtherCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AccountReceivablesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AccountReceivablesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Account Receivables Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AccountReceivablesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Account receivables current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Type of Restructuring [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued to settle related party debt, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive loss for the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromExternalCustomersByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of revenue from external customers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromExternalCustomersByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign currency translation adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange differences on translation of foreign operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]</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/terseLabel">Equity Components</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="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_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="drttf_ProductAndTransportationRevenuesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total product and transportation revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProductAndTransportationRevenuesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product And Transportation Revenues [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProductAndTransportationRevenuesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Product and transportation revenues.</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_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="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">weighted average fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartyExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related party expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartyExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartyExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related Party Expenses</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 and other assets, current and long term</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_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Restricted Stock Award, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued on vesting of RSUs (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsHeldForSaleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Held-for-Sale [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Change to Plan of Sale, Reclassification from Held-for-Sale to Held-and-Used, Impairment Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment charge on reassessment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment charge on reassessment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EquitySettledAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity-settled Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EquitySettledAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Settled Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EquitySettledAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity-settled awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentyFive-JuneThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June First Two Thousand Twenty Five - June Thirty Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentyFive-JuneThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June First Two Thousand Twenty Five - June Thirty Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JuneFirstTwoThousandTwentyFive-JuneThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 1, 2025 - June 30, 2025</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_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="drttf_LineOfCreditFacilityAggregateExcessAvailability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility, aggregate excess availability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LineOfCreditFacilityAggregateExcessAvailability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Aggregate Excess Availability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LineOfCreditFacilityAggregateExcessAvailability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility aggregate excess availability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022 PRSUs [ Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Two Performance Based Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyTwoPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty two performance-based restricted stock units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Purchase Commitment, Category of Item Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Purchase Commitment, Category of Item Purchased [Domain]</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">Securities excluded from calculation of net income (loss) per share</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_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">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/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseTerminationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Termination Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseTerminationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Termination Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseTerminationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share repurchase termination date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DilutiveRSUs_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilutive RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DilutiveRSUs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dilutive RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DilutiveRSUs_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dilutive RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareAcquiredAndCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Share Acquired and Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareAcquiredAndCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Share Acquired and Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareAcquiredAndCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Share Acquired and Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommonShareAcquiredAndCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled from Shares NCIB and Share Repurchase (each as defined in Note 9) (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventory, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government subsidies receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidy Receivable Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subsidy receivable current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Government subsidies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtIssuances_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtIssuances_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Issuances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtIssuances_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Long Term Debt Issuances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Common Stock Outstanding Roll Forward [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Common Shares Repurchased and Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CanadianDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Canadian Dollar Advances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CanadianDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Canadian Dollar Advances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CanadianDollarAdvancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Canadian Dollar Advances.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized, Unlimited [Fixed List]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PrincipalAmountOutstandingOnConvertibleDebentures_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Principal Amount Outstanding On Convertible Debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PrincipalAmountOutstandingOnConvertibleDebentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Principal Amount Outstanding On Convertible Debentures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PrincipalAmountOutstandingOnConvertibleDebentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentySix-AprilThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">April First Two Thousand Twenty Six - April Thirty Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentySix-AprilThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">April First Two Thousand Twenty Six - April Thirty Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AprilFirstTwoThousandTwentySix-AprilThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 1, 2026 - April 30, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, conversion price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Conversion Price</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/terseLabel">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_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/periodStartLabel">Number of options, Outstanding at the beginning</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">Number of options, Outstanding at the end</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/terseLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LicenseFeesFromDistributionPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Fees From Distribution Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LicenseFeesFromDistributionPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License fees from distribution partners.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LicenseFeesFromDistributionPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License fees from Construction Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</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_AcceleratedShareRepurchasesDateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Share Repurchases, Date [Axis]</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="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="drttf_LongTermDebtCurrentAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current portion of long-term debt and accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtCurrentAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Current And Accrued Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LongTermDebtCurrentAndAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Long-term debt current and accrued interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</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 [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="drttf_RangeOfExercisePricesOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range $4.01 to $6.00 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range of Exercise Prices One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range of Exercise Prices One [Member]</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/terseLabel">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">Operating 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/verboseLabel">Operating income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total number of shares purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Purchased As Part Of Publicly Announced programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesPurchasedAsPartOfPubliclyAnnouncedPrograms_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares Purchased As Part Of Publicly Announced programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lender Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lender Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ChiefTransformationOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chief Transformation Officer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ChiefTransformationOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chief Transformation Officer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ChiefTransformationOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chief Transformation Officer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Compensation Liability, Current and Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Compensation Liability, Current and Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Liability, Current and Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Installation and other services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformancePeriodDate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Performance period date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformancePeriodDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance Period Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformancePeriodDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Period Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Selling and Marketing Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales and marketing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling and Marketing Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</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">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">REVENUE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DilutiveNewDSUs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dilutive New DSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DilutiveNewDSUs_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dilutive New DSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AcquireAdditionalCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquire Additional Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AcquireAdditionalCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquire Additional Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AcquireAdditionalCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquire additional common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_BDCLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BDC Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_BDCLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BDC Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_BDCLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BDC Loan [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">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/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SalesDepositPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Deposit Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SalesDepositPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales Deposit Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</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_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current tax expense (recovery)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Current Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Current and deferred income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NetincomeLossIncludinginterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Including Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NetincomeLossIncludinginterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">NetIncome(Loss)IncludingInterest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_NetincomeLossIncludinginterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Income (Loss) Including Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss (loss) for the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Operating Segment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Vested or settled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based compensation arrangement by share-based payment award, non-option equity instruments vested.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</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_OptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options Held [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Trade and accrued receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Issued During Period Shares Stock Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredOverTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Over time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredOverTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transferred over Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of PSUs outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of units, Outstanding at the beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of units, Outstanding at the end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdvancesTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advances Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdvancesTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advances Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdvancesTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Advances Type</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_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="drttf_AdditionalSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">additional shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdditionalSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">additional shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Authority, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Authority, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CustomerDepositsAndDeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer deposits and deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CustomerDepositsAndDeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Deposits And Deferred Revenue Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CustomerDepositsAndDeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Revenue And Customer Advances And Deposits,current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of cash flow information:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentyFive-MayThirtyOneTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May First Two Thousand Twenty Five - May Thirty One Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentyFive-MayThirtyOneTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May First Two Thousand Twenty Five - May Thirty One Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MayFirstTwoThousandTwentyFive-MayThirtyOneTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 1, 2025 - May 31, 2025</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="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accounts, Notes, Loans and Financing Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</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="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt, Excluding Current Maturities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Excluding Current Maturities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Price Range [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Trade and accrued receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts and Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingEstimateTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Estimate [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingEstimateTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">COVID-19</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Award Tranche Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Trade and accrued receivables, net of expected credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting standards adopted date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Adoption Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SOFRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SOFRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SOFRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ExtinguishmentOfDebtDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Extinguishment of Debt Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfAssetsHeldForSaleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Assets Held For Sale Table Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfAssetsHeldForSaleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Assets Held For Sale Table Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ScheduleOfAssetsHeldForSaleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023And2024LtipMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted Under The 2023 And 2024 LTIP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023And2024LtipMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Granted Under The Twenty Thousand Twenty Three And Two Thousand Twenty Four LTIP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023And2024LtipMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Granted Under The Twenty Thousand Twenty Three And Two Thousand Twenty Four LTIP [Member]</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 loss per share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Commencement Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Commencement Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share repurchase commencement gate</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/terseLabel">Plan Name</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="drttf_DocumentCoverPageAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document - Cover Page [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DocumentCoverPageAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Cover Page [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DocumentCoverPageAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Document Cover Page Abstract</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/terseLabel">Subsequent Event Type</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="drttf_MarchFirstTwoThousandTwentySix-MarchThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">March First Two Thousand Twenty Six - March Thirty First Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MarchFirstTwoThousandTwentySix-MarchThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">March First Two Thousand Twenty Six - March Thirty First Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_MarchFirstTwoThousandTwentySix-MarchThirtyFirstTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March 1, 2026 - March 31, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: expected credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade and other receivables, expected credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 PRSUs [ Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty One Performance Based Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty one performance-based restricted stock units.</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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities [Abstract]</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_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Related Party Debt</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Unit And Share Awards Withheld To Settle Employee Tax Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock unit and share awards withheld to settle employee tax obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RSUs withheld to settle employee tax obligations</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/terseLabel">Equity Component</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="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</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="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer deposits and deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Contract with Customer, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseInLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseInLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IncreaseDecreaseInLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase Decrease In Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues from External Customers and Long-Lived Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Timing of Transfer of Good or Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Timing of Transfer of Good or Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income taxes received (paid)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Taxes Paid, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Paid, after Refund Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SignificantCustomerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Customer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SignificantCustomerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Customer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SignificantCustomerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Significant customer.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Common Stock, Shares Outstanding</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="drttf_GainOnSaleOfSoftwareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GAIN ON SALE OF SOFTWARE [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GainOnSaleOfSoftwareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">GAIN ON SALE OF SOFTWARE [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Long Term Debt Reconciliation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsToAcquireOtherAssetExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments to acquire other asset expenditures.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsToAcquireOtherAssetExpenditures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Other Asset Expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PaymentsToAcquireOtherAssetExpenditures_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other asset expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesRestatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Restated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesRestatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares Restated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SharesRestatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Restated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of shares outstanding (in thousands)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding Reconciliation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExtendedTheTermOfTheLeaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Extended the term of the lease agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ExtendedTheTermOfTheLeaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Extended the term of the lease agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ReorganizationCostsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reorganization costs payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ReorganizationCostsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reorganization costs payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ReorganizationCostsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reorganization costs payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ReorganizationCostsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Reorganization costs in accounts payable and accrued liabilities at June 30, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ReorganizationCostsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Reorganization costs in accounts payable and accrued liabilities at January 1, 2026</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/terseLabel">Statement [Table]</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/terseLabel">Stock-based compensation</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_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">Net income (loss) before tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeasonalityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Seasonality</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeasonalityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seasonality Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeasonalityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for seasonality.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Segment Profit and loss reconciliation to Net income (loss) After tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</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 flows (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/terseLabel">Statement [Line Items]</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_CommitmentsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsDisclosureTextBlock_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="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">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/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Timing of Transfer of Good or Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Timing of Transfer of Good or Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubleaseDepositsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubleaseDepositsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Deposits, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubleaseDepositsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sublease deposits, current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LegalProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Provisions Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LegalProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legal Provisions Current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_LegalProvisionsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other provisions and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ConvertibleUnsecuredSubordinatedDebenturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Debentures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ConvertibleUnsecuredSubordinatedDebenturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Unsecured Subordinated Debentures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ConvertibleUnsecuredSubordinatedDebenturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible unsecured subordinated debentures.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SettlementOfDeferredSharesUnitesLiabilitiesAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Settlement of Deferred Shares Unites Liabilities Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SettlementOfDeferredSharesUnitesLiabilitiesAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Settlement of Deferred Shares Unites Liabilities Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SettlementOfDeferredSharesUnitesLiabilitiesAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement of DSU liability Amount (as defined in Note 9)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued to settle related party debt, amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MedianMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Median [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Granted under the 2023 LITP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Granted Under The Two Thousand Twenty Three LTIP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_GrantedUnderThe2023LitpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted Under The 2023 LTIP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principles of consolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestEarned_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Earned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestEarned_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest Earned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestEarned_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest earned</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">Share based compensation other than option 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_AcceleratedShareRepurchasesFinalPricePaidPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average price paid per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AcceleratedShareRepurchasesFinalPricePaidPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Share Repurchases, Final Price Paid Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost and Reserve [Line Items]</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="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_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, transaction cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Restricted Stock Award, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued on vesting of RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</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_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Restructuring</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reorganization costs paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Reorganization costs paid</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">Share 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">Common Stock, Shares, Outstanding, Ending Balance</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">Common Stock, Shares, Outstanding, Beginning Balance</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">Common 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/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prime Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prime Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Ex Transition Period</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_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable, Weighted average remaining life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted-Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfExtinguishmentOfDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Extinguishment of Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfExtinguishmentOfDebtTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Gain on Extinguishment of Convertible Debentures [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredAtPointInTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">At a point in time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredAtPointInTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transferred at Point in Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in Accounting Principle, Accounting Standards Update, Adopted [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Adopted [true false]</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">Long-term 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="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract With Customer Liability Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableNetOfExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidy Receivable Net of Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SubsidyReceivableNetOfExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subsidy receivable net of expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">January [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">January [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_JanuaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_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_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital, Common Stock</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="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Revenues, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Revenue</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="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</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_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 PartyTransaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument covenant terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Covenant Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartiesRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related parties revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartiesRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related Parties Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RelatedPartiesRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Parties Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SoftwareAndPatentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Software and Patents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SoftwareAndPatentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Software and Patents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SoftwareAndPatentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Software and Patents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureTextBlockAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Text Block [Abstract]</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, net</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/terseLabel">Amendment Flag</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_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_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_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility, maximum borrowing capacity, description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Borrowing Capacity, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Performance-Based Restricted Share Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRSUs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance-based restricted stock units.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DepartmentOfJusticeCostPotentialSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Department of Justice Cost Potential Settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_DepartmentOfJusticeCostPotentialSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Department of Justice Cost Potential Settlement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PledgingPurposeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pledging Purpose [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyFourSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyFourSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentyFourSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</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_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued for employee share purchase plan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Nonoperating, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommercialMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommercialMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commercial [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_CommercialMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial.</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="us-gaap_LicenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LicenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License fees from Construction Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts and Financing Receivables [Table]</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">Expenses</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="drttf_TwoThousandTwentySixSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Six Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentySixSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Six Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TwoThousandTwentySixSupportAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026 Support Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long Term Purchase Commitment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Purchase Commitment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransformationOfficeCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transformation Office Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransformationOfficeCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transformation Office Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_TransformationOfficeCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transformation Office costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentageOfIssuedAndOutstandingCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Issued and Outstanding Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentageOfIssuedAndOutstandingCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of Issued and Outstanding Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_PercentageOfIssuedAndOutstandingCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage Of Issued And Outstanding Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProductOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProductOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ProductOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Product One</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">Purchase Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options exercisable, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumSharesRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Maximum Shares Remaining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumSharesRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Maximum Shares Remaining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseMaximumSharesRemaining_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of share that may yet be purchased under the program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestExpenseRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestExpenseRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_InterestExpenseRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest Expense Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RBCFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RBC Facilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RBCFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">R B C Facilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RBCFacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RBC Facility [Member]</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/verboseLabel">Current Liabilities</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="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_OtherLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">OTHER LIABILITIES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Disclosure [Text Block]</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/totalLabel">Property, Plant and Equipment, Gross, 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/periodStartLabel">Assets held for sale, opening</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">Assets held for sale, ending</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, cash equivalents and restricted cash, beginning of 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/totalLabel">Total cash, cash equivalents and restricted cash</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, cash equivalents and restricted cash, end of 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/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_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SEGMENT REPORTING</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AcceleratedShareRepurchasesDateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Share Repurchases, Date [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealized_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Foreign exchange (gain) loss</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/terseLabel">Trading Symbol</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="srt_ShareRepurchaseProgramDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</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_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible debentures, interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate During Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</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="drttf_IntellectualPropertyOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intellectual property ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_IntellectualPropertyOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Intellectual property ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Revenues From External Customers [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table]</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="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_ReceivablesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivables [Abstract]</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/terseLabel">Plan Name</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_PaymentsForSoftware_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments for Software, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForSoftware_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Capitalized software development expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForSoftware_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Software</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsHeldForSaleNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Assets Held-for-Sale, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt aggregate gross proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from (Repayments of) Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from (Repayments of) Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentyFive-FebruaryTwentyEightTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February First Two Thousand Twenty Five - February Twenty Eight Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentyFive-FebruaryTwentyEightTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">February First Two Thousand Twenty Five - February Twenty Eight Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_FebruaryFirstTwoThousandTwentyFive-FebruaryTwentyEightTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 1, 2025 - February 28, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued for employee share purchase plan (In Shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of RSUs, Share Awards, PSUs, DSUs Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Accounting Pronouncements Or Change In Accounting Principle [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements or Change in Accounting Principle [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitsTimeBasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units Time Based [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitsTimeBasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units Time Based [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RestrictedStockUnitsTimeBasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock units time based.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdjustmentsAndReconcilingItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reconciling items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdjustmentsAndReconcilingItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments and reconciling items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_AdjustmentsAndReconcilingItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments and reconciling items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableGrossCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableGrossCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, before Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RSUsAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RSUs and Share Awards Withheld to Settle Employee Tax Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RSUsAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RSUs and Share Awards Withheld to Settle Employee Tax Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RSUsAndShareAwardsWithheldToSettleEmployeeTaxObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RSUs withheld to settle employee tax obligations (in share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ExtraordinaryAndUnusualItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unusual or Infrequent Items, or Both [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeptemberFirstTwoThousandTwentyFive-SeptemberThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">September First Two Thousand Twenty Five - September Thirty Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeptemberFirstTwoThousandTwentyFive-SeptemberThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">September First Two Thousand Twenty Five - September Thirty Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_SeptemberFirstTwoThousandTwentyFive-SeptemberThirtyTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 1, 2025 - September 30, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccretionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accretion of issue costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccretionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accretion 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_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/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range $4.01 to $5.00 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Of Exercise Prices For Outstanding Share Options Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesForOutstandingShareOptionsFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range Of Exercise Prices For Outstanding Share Options Five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CanadaRevenueAgencyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Canada [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CanadaRevenueAgencyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Canada Revenue Agency [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ContractWithCustomerLiabilityCustomerDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ContractWithCustomerLiabilityCustomerDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Customer Deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ContractWithCustomerLiabilityCustomerDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract with customer liability customer deposits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flows (used in) provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingChangesAndErrorCorrectionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Changes and Error Corrections [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EmployeeRetentionCreditBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ERC balance receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EmployeeRetentionCreditBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Retention Credit Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_EmployeeRetentionCreditBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee Retention Credit Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UndiscountedOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undiscounted operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UndiscountedOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Undiscounted Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_UndiscountedOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Undiscounted operating lease liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchase Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_ShareRepurchaseDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of options, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of options, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long Term Purchase Commitment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Purchase Commitment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price Range $7.01 to $7.84 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range of Exercise Prices Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="drttf_RangeOfExercisePricesTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range of Exercise Prices Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GovernmentContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GovernmentContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Government Contract [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl"/>
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  <xsd:element id="drttf_EstimatedClaimsPayable" name="EstimatedClaimsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
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  <xsd:element id="drttf_CommonShareAcquiredAndCancelled" name="CommonShareAcquiredAndCancelled" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ShareRepurchaseDiscountRate" name="ShareRepurchaseDiscountRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_InventoryAndPropertyPlantAndEquipmentMember" name="InventoryAndPropertyPlantAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="drttf_UnusualRiskOrUncertaintyImpactTextBlock" name="UnusualRiskOrUncertaintyImpactTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
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  <xsd:element id="drttf_SOFRMember" name="SOFRMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_GainOnSaleOfSoftwareAbstract" name="GainOnSaleOfSoftwareAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_CancelledFromNormalCourseIssuerBid" name="CancelledFromNormalCourseIssuerBid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_TwoThousandTwentyFourSupportAgreementMember" name="TwoThousandTwentyFourSupportAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_RSUsAndShareAwardsWithheldToSettleEmployeeTaxObligations" name="RSUsAndShareAwardsWithheldToSettleEmployeeTaxObligations" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_EquitySettledAwardsMember" name="EquitySettledAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_EducationMember" name="EducationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_GovernmentSubsidiesReceived" name="GovernmentSubsidiesReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_SettlementOfDeferredSharesUnitesLiabilitiesAmount" name="SettlementOfDeferredSharesUnitesLiabilitiesAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_LiborMember" name="LiborMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_TwentyTwoNwFundLpMember" name="TwentyTwoNwFundLpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_ConvertibleUnsecuredSubordinatedDebenturesMember" name="ConvertibleUnsecuredSubordinatedDebenturesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_GainOnExtinguishmentOfCobertibleDebenturesTextBlock" name="GainOnExtinguishmentOfCobertibleDebenturesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_MarchFirstTwoThousandTwentyFive-MarchThirtyFirstTwoThousandTwentyFiveMember" name="MarchFirstTwoThousandTwentyFive-MarchThirtyFirstTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_RestrictedStockUnitAndShareAwardsWithheldToSettleEmployeeTaxObligations" name="RestrictedStockUnitAndShareAwardsWithheldToSettleEmployeeTaxObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_InterestEarned" name="InterestEarned" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_PrincipalAmountOutstandingOnConvertibleDebentures" name="PrincipalAmountOutstandingOnConvertibleDebentures" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_PercentageOfIssuedAndOutstandingCommonShares" name="PercentageOfIssuedAndOutstandingCommonShares" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ShareAwardsMember" name="ShareAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_DebtInstrumentConversionConvertedInstrumentSharesIssuedForBasisPrincipal" name="DebtInstrumentConversionConvertedInstrumentSharesIssuedForBasisPrincipal" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ScheduleOfIncomeTaxTable" name="ScheduleOfIncomeTaxTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_FebruaryFirstTwoThousandTwentySix-FebruaryTwentyEightTwoThousandTwentySixMember" name="FebruaryFirstTwoThousandTwentySix-FebruaryTwentyEightTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_TwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember" name="TwoThousandTwentyOnePerformanceBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_RangeOfExercisePricesForOutstandingShareOptionsFiveMember" name="RangeOfExercisePricesForOutstandingShareOptionsFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_FebruaryFirstTwoThousandTwentyFive-FebruaryTwentyEightTwoThousandTwentyFiveMember" name="FebruaryFirstTwoThousandTwentyFive-FebruaryTwentyEightTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_PaymentsRelatedToWarranties" name="PaymentsRelatedToWarranties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_WarrantyAndOtherProvisionsCurrent" name="WarrantyAndOtherProvisionsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_RangeOfExercisePricesForOutstandingShareOptionsSevenMember" name="RangeOfExercisePricesForOutstandingShareOptionsSevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_InterestExpenseRelatedParties" name="InterestExpenseRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_ShareRepurchaseTerminationDate" name="ShareRepurchaseTerminationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ProceedsFromRecoveryOfSoftwareDevelopmentExpenditures" name="ProceedsFromRecoveryOfSoftwareDevelopmentExpenditures" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_SubleaseDepositsCurrent" name="SubleaseDepositsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_SignificantCustomerMember" name="SignificantCustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_TransformationOfficeCostsMember" name="TransformationOfficeCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_JuneFirstTwoThousandTwentyFive-JuneThirtyTwoThousandTwentyFiveMember" name="JuneFirstTwoThousandTwentyFive-JuneThirtyTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_UsDollarAdvancesMember" name="UsDollarAdvancesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_CustomerDepositsAndDeferredRevenueCurrent" name="CustomerDepositsAndDeferredRevenueCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_AugustFirstTwoThousandTwentyFive-AugustThirtyFirstTwoThousandTwentyFiveMember" name="AugustFirstTwoThousandTwentyFive-AugustThirtyFirstTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_CashSettledAwardsMember" name="CashSettledAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_GrantedUnderThe2023LitpMember" name="GrantedUnderThe2023LitpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_LeasingFacilitiesMember" name="LeasingFacilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_ShareRepurchaseAgreementMember" name="ShareRepurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_RepurchasedForCancellationOfPrinicipalBalance" name="RepurchasedForCancellationOfPrinicipalBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_DocumentCoverPageAbstract" name="DocumentCoverPageAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_FurtherAnticipatedReorganizationCosts" name="FurtherAnticipatedReorganizationCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_OverdueReceivables" name="OverdueReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_ScheduleOfIncomeTaxLineItems" name="ScheduleOfIncomeTaxLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_ShareBasedCompensationAwardTrancheFourMember" name="ShareBasedCompensationAwardTrancheFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_SeptemberFirstTwoThousandTwentyFive-SeptemberThirtyTwoThousandTwentyFiveMember" name="SeptemberFirstTwoThousandTwentyFive-SeptemberThirtyTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_LegalProvisionsCurrent" name="LegalProvisionsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_PaymentsToAcquireOtherAssetExpenditures" name="PaymentsToAcquireOtherAssetExpenditures" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_AccretionOfConvertibleDebentures" name="AccretionOfConvertibleDebentures" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_RelatedPartiesRevenue" name="RelatedPartiesRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_AdjustmentsAndReconcilingItems" name="AdjustmentsAndReconcilingItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_JanuaryMember" name="JanuaryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_SubsidyReceivableNetOfExpenses" name="SubsidyReceivableNetOfExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_SalesDepositPercentage" name="SalesDepositPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ShareRepurchaseCommencementDate" name="ShareRepurchaseCommencementDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_AdditionsToWarrantyProvision" name="AdditionsToWarrantyProvision" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_AssetsHeldForSaleMember" name="AssetsHeldForSaleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_IntellectualPropertyOwnershipPercentage" name="IntellectualPropertyOwnershipPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ProceedsFromEmployeeTaxPaymentsOnVestingOfRestrictedStockUnits" name="ProceedsFromEmployeeTaxPaymentsOnVestingOfRestrictedStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_AccountReceivablesCurrent" name="AccountReceivablesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate" name="DebtInstrumentConvertiblePrincipalAmountOfDebenturesAsBasisForConversionRate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_SettlementOfDeferredSharesUnitesLiabilitiesShares" name="SettlementOfDeferredSharesUnitesLiabilitiesShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ShareRepurchaseMaximumSharesRemaining" name="ShareRepurchaseMaximumSharesRemaining" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_CanadianDollarAdvancesMember" name="CanadianDollarAdvancesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_IssuedOnRightsOfferingInShares" name="IssuedOnRightsOfferingInShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ProductAndTransportationRevenuesMember" name="ProductAndTransportationRevenuesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_NewRBCFacilityMember" name="NewRBCFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_DilutiveRSUs" name="DilutiveRSUs" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_ShareRepurchaseMaximumShares" name="ShareRepurchaseMaximumShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_TransportationMember" name="TransportationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_AprilFirstTwoThousandTwentySix-AprilThirtyTwoThousandTwentySixMember" name="AprilFirstTwoThousandTwentySix-AprilThirtyTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_DeferredShareUnitLiabilityCurrent" name="DeferredShareUnitLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_ChiefTransformationOfficerMember" name="ChiefTransformationOfficerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_MarchFirstTwoThousandTwentySix-MarchThirtyFirstTwoThousandTwentySixMember" name="MarchFirstTwoThousandTwentySix-MarchThirtyFirstTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_AdvancesTypeDomain" name="AdvancesTypeDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_MayFirstTwoThousandTwentySix-MayThirtyOneTwoThousandTwentySixMember" name="MayFirstTwoThousandTwentySix-MayThirtyOneTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_JuneFirstTwoThousandTwentySix-JuneThirtyTwoThousandTwentySixMember" name="JuneFirstTwoThousandTwentySix-JuneThirtyTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_DilutiveNewDSUs" name="DilutiveNewDSUs" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_PercentageOfIssuedAndOutstandingShare" name="PercentageOfIssuedAndOutstandingShare" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_AdvancesTypeAxis" name="AdvancesTypeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_MayFirstTwoThousandTwentyFive-MayThirtyOneTwoThousandTwentyFiveMember" name="MayFirstTwoThousandTwentyFive-MayThirtyOneTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_SeasonalityPolicyTextBlock" name="SeasonalityPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount" name="AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_GainOnSaleOfSoftwareAndPatentsTextBlock" name="GainOnSaleOfSoftwareAndPatentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="drttf_AprilFirstTwoThousandTwentyFive-AprilThirtyTwoThousandTwentyFiveMember" name="AprilFirstTwoThousandTwentyFive-AprilThirtyTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_LongTermDebtCurrentAndAccruedInterest" name="LongTermDebtCurrentAndAccruedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_PerformanceBasedRestrictedStockUnitsMember" name="PerformanceBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_TwoThousandTwentySixSupportAgreementMember" name="TwoThousandTwentySixSupportAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_OperationSupportExpenses" name="OperationSupportExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_ExchangeDifferencesAdjustmentToDebt" name="ExchangeDifferencesAdjustmentToDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_SharesIssuableOnDebetutresPrincipalAmountSettledInCommonSharesMember" name="SharesIssuableOnDebetutresPrincipalAmountSettledInCommonSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_GrantedUnderThe2024LitpMember" name="GrantedUnderThe2024LitpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_JanuaryFirstTwoThousandTwentyFive-JanuaryThirtyFirstTwoThousandTwentyFiveMember" name="JanuaryFirstTwoThousandTwentyFive-JanuaryThirtyFirstTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_PercentOfTradeAccountsReceivableInsured" name="PercentOfTradeAccountsReceivableInsured" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_GrantedUnderThe2023And2024LtipMember" name="GrantedUnderThe2023And2024LtipMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_DepartmentOfJusticeCostPotentialSettlement" name="DepartmentOfJusticeCostPotentialSettlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_ContractWithCustomerLiabilityCustomerDeposits" name="ContractWithCustomerLiabilityCustomerDeposits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="drttf_RockHillFacilityClosureOfOperationsMember" name="RockHillFacilityClosureOfOperationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_RangeOfExercisePricesThreeMember" name="RangeOfExercisePricesThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="drttf_AcquireAdditionalCommonShares" name="AcquireAdditionalCommonShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="drttf_IncreaseDecreaseCurrentPortionOfLongTermDebtAndAccruedInterest" name="IncreaseDecreaseCurrentPortionOfLongTermDebtAndAccruedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="drttf_WeightedAveragePerShares" name="WeightedAveragePerShares" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
</xsd:schema>
