<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>91</ContextCount>
  <ElementCount>269</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>30</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000002 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000004 - Statement - Unaudited Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/UnauditedCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Unaudited Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000005 - Statement - Unaudited Condensed Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/UnauditedCondensedConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>Unaudited Condensed Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000006 - Statement - Unaudited Consolidated Statements of Changes in Stockholders Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/UnauditedConsolidatedStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>Unaudited Consolidated Statements of Changes in Stockholders Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000007 - Statement - Unaudited Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/UnauditedCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Unaudited Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000008 - Disclosure - Organization and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/OrganizationAndSignificantAccountingPolicies</Role>
      <ShortName>Organization and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000009 - Disclosure - Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/Acquisitions</Role>
      <ShortName>Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000010 - Disclosure - Goodwill and Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/GoodwillAndIntangibleAssets</Role>
      <ShortName>Goodwill and Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000011 - Disclosure - Note Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/NotePayable</Role>
      <ShortName>Note Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000012 - Disclosure - Other Long-term Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/OtherLongTermLiabilities</Role>
      <ShortName>Other Long-term Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000013 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000014 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000015 - Disclosure - Concentrations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/Concentrations</Role>
      <ShortName>Concentrations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000016 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>000017 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>000018 - Disclosure - Organization and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/OrganizationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Organization and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://dlti.com/role/OrganizationAndSignificantAccountingPolicies</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/AcquisitionsTables</Role>
      <ShortName>Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dlti.com/role/Acquisitions</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000020 - Disclosure - Goodwill and Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/GoodwillAndIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dlti.com/role/GoodwillAndIntangibleAssets</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>000021 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dlti.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>000022 - Disclosure - Organization and Significant Accounting Policies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/OrganizationAndSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>Organization and Significant Accounting Policies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/OrganizationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>000023 - Disclosure - Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/AcquisitionsDetails</Role>
      <ShortName>Acquisitions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/AcquisitionsTables</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>000024 - Disclosure - Acquisitions (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/AcquisitionsDetails1</Role>
      <ShortName>Acquisitions (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/AcquisitionsTables</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000025 - Disclosure - Acquisitions (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/AcquisitionsDetails2</Role>
      <ShortName>Acquisitions (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/AcquisitionsTables</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000026 - Disclosure - Acquisitions (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/AcquisitionsDetailsNarrative</Role>
      <ShortName>Acquisitions (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/AcquisitionsTables</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>000027 - Disclosure - Goodwill and Intangible Assets (Details )</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/GoodwillAndIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets (Details )</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>000028 - Disclosure - Goodwill and Intangible Assets (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/GoodwillAndIntangibleAssetsDetails1</Role>
      <ShortName>Goodwill and Intangible Assets (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>000029 - Disclosure - Goodwill and Intangible Assets (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/GoodwillAndIntangibleAssetsDetailsNarrative</Role>
      <ShortName>Goodwill and Intangible Assets (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>000030 - Disclosure - Note Payable (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/NotePayableDetailsNarrative</Role>
      <ShortName>Note Payable (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/NotePayable</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>000031 - Disclosure - Other Long-term Liabilities (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/OtherLongTermLiabilitiesDetailsNarrative</Role>
      <ShortName>Other Long-term Liabilities (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/OtherLongTermLiabilities</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>000032 - Disclosure - Stockholders Equity (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/StockholdersEquityDetailsNarrative</Role>
      <ShortName>Stockholders Equity (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>000033 - Disclosure - Related Party Transactions (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/RelatedPartyTransactionsDetailsNarrative</Role>
      <ShortName>Related Party Transactions (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/RelatedPartyTransactions</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>000034 - Disclosure - Concentrations (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/ConcentrationsDetailsNarrative</Role>
      <ShortName>Concentrations (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/Concentrations</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>000035 - Disclosure - Commitments and contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>000036 - Disclosure - Commitments and contingencies (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CommitmentsAndContingenciesDetails1</Role>
      <ShortName>Commitments and contingencies (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>000037 - Disclosure - Commitments and contingencies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/CommitmentsAndContingenciesDetailsNarrative</Role>
      <ShortName>Commitments and contingencies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="dlti-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>000038 - Disclosure - Subsequent Events (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dlti.com/role/SubsequentEventsDetailsNarrative</Role>
      <ShortName>Subsequent Events (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dlti.com/role/SubsequentEvents</ParentRole>
      <Position>38</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>dlti-20210331.xml</File>
    <File>dlti-20210331.xsd</File>
    <File>dlti-20210331_cal.xml</File>
    <File>dlti-20210331_def.xml</File>
    <File>dlti-20210331_lab.xml</File>
    <File>dlti-20210331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
