<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>55</ContextCount>
  <ElementCount>155</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>15</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000002 - Statement - INTERIM CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/InterimConsolidatedBalanceSheets</Role>
      <ShortName>INTERIM CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000003 - Statement - INTERIM CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/InterimConsolidatedStatementsOfNetLossIncomeAndComprehensiveLossIncomeUnaudited</Role>
      <ShortName>INTERIM CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME AND COMPREHENSIVE (LOSS) INCOME (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000004 - Statement - INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/InterimConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000005 - Statement - INTERIM CONSOLIDATED STATEMENTS OF EQUITY (Deficiency) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/InterimConsolidatedStatementsOfEquityDeficiencyUnaudited</Role>
      <ShortName>INTERIM CONSOLIDATED STATEMENTS OF EQUITY (Deficiency) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000006 - Disclosure - CORPORATE INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/CorporateInformation</Role>
      <ShortName>CORPORATE INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000007 - Disclosure - BASIS OF PREPARATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/BasisOfPreparation</Role>
      <ShortName>BASIS OF PREPARATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000008 - Disclosure - SIGNIFICANT ACCOUNTING JUDGEMENTS ESTIMATES AND ASSUMPTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SignificantAccountingJudgementsEstimatesAndAssumptions</Role>
      <ShortName>SIGNIFICANT ACCOUNTING JUDGEMENTS ESTIMATES AND ASSUMPTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000009 - Disclosure - SHARE CAPITAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapital</Role>
      <ShortName>SHARE CAPITAL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000010 - Disclosure - SELLING GENERAL AND ADMINISTRATION EXPENSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SellingGeneralAndAdministrationExpenses</Role>
      <ShortName>SELLING GENERAL AND ADMINISTRATION EXPENSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000011 - Disclosure - RESTRUCTURING PLAN ACTIVITIES, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/RestructuringPlanActivitiesNet</Role>
      <ShortName>RESTRUCTURING PLAN ACTIVITIES, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000012 - Disclosure - NET (LOSS) EARNINGS PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/NetLossEarningsPerShare</Role>
      <ShortName>NET (LOSS) EARNINGS PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000013 - Disclosure - RELATED PARTY DISCLOSURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/RelatedPartyDisclosures</Role>
      <ShortName>RELATED PARTY DISCLOSURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000014 - Disclosure - SEGMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SegmentInformation</Role>
      <ShortName>SEGMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000015 - Disclosure - SHARE CAPITAL (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapitalTables</Role>
      <ShortName>SHARE CAPITAL (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dleta.com/role/ShareCapital</ParentRole>
      <Position>15</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000016 - Disclosure - SELLING GENERAL AND ADMINISTRATION EXPENSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SellingGeneralAndAdministrationExpensesTables</Role>
      <ShortName>SELLING GENERAL AND ADMINISTRATION EXPENSES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dleta.com/role/SellingGeneralAndAdministrationExpenses</ParentRole>
      <Position>16</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>000017 - Disclosure - NET (LOSS) EARNINGS PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/NetLossEarningsPerShareTables</Role>
      <ShortName>NET (LOSS) EARNINGS PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dleta.com/role/NetLossEarningsPerShare</ParentRole>
      <Position>17</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>000018 - Disclosure - SEGMENT INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SegmentInformationTables</Role>
      <ShortName>SEGMENT INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dleta.com/role/SegmentInformation</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000019 - Disclosure - CORPORATE INFORMATION (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/CorporateInformationDetailsNarrative</Role>
      <ShortName>CORPORATE INFORMATION (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/CorporateInformation</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000020 - Disclosure - SHARE CAPITAL (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapitalDetails</Role>
      <ShortName>SHARE CAPITAL (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/ShareCapitalTables</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>000021 - Disclosure - SHARE CAPITAL (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapitalDetails1</Role>
      <ShortName>SHARE CAPITAL (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/ShareCapitalTables</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>000022 - Disclosure - SHARE CAPITAL (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapitalDetails2</Role>
      <ShortName>SHARE CAPITAL (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/ShareCapitalTables</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>000023 - Disclosure - SHARE CAPITAL (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/ShareCapitalDetailsNarrative</Role>
      <ShortName>SHARE CAPITAL (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/ShareCapitalTables</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>000024 - Disclosure - SELLING GENERAL AND ADMINISTRATION EXPENSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SellingGeneralAndAdministrationExpensesDetails</Role>
      <ShortName>SELLING GENERAL AND ADMINISTRATION EXPENSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/SellingGeneralAndAdministrationExpensesTables</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000025 - Disclosure - SELLING GENERAL AND ADMINISTRATION EXPENSES (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SellingGeneralAndAdministrationExpensesDetailsNarrative</Role>
      <ShortName>SELLING GENERAL AND ADMINISTRATION EXPENSES (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/SellingGeneralAndAdministrationExpensesTables</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000026 - Disclosure - RESTRUCTURING PLAN ACTIVITIES Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/RestructuringPlanActivitiesNetDetails</Role>
      <ShortName>RESTRUCTURING PLAN ACTIVITIES Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/RestructuringPlanActivitiesNet</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>000027 - Disclosure - NET (LOSS) EARNINGS PER SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/NetLossEarningsPerShareDetails</Role>
      <ShortName>NET (LOSS) EARNINGS PER SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/NetLossEarningsPerShareTables</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>000028 - Disclosure - RELATED PARTY DISCLOSURES (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/RelatedPartyDisclosuresDetailsNarrative</Role>
      <ShortName>RELATED PARTY DISCLOSURES (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/RelatedPartyDisclosures</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>000029 - Disclosure - SEGMENT INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SegmentInformationDetails</Role>
      <ShortName>SEGMENT INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/SegmentInformationTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="dtea_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>000030 - Disclosure - SEGMENT INFORMATION (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dleta.com/role/SegmentInformationDetails1</Role>
      <ShortName>SEGMENT INFORMATION (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dleta.com/role/SegmentInformationTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" original="dtea_10q.htm">dtea_10q.htm</File>
    <File>dtea-20220430.xsd</File>
    <File>dtea-20220430_cal.xml</File>
    <File>dtea-20220430_def.xml</File>
    <File>dtea-20220430_lab.xml</File>
    <File>dtea-20220430_pre.xml</File>
    <File>dtea_ex311.htm</File>
    <File>dtea_ex312.htm</File>
    <File>dtea_ex321.htm</File>
    <File>dtea_ex322.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>dtea_10qimg22.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="207">http://xbrl.ifrs.org/taxonomy/2021-03-24/ifrs-full</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
