<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>154</ContextCount>
  <ElementCount>79</ElementCount>
  <EntityCount>2</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>42</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ltgr.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>99554.2 - Disclosure - S-K 1602, SPAC Registered Offerings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602</Role>
      <ShortName>S-K 1602, SPAC Registered Offerings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>99554.2.1.3 - Disclosure - S-K 1602(a)(3) Forepart, Sponsor Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602a3</Role>
      <ShortName>S-K 1602(a)(3) Forepart, Sponsor Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>99554.2.1.4 - Disclosure - S-K 1602(a)(4) Forepart, Adjusted NTBV</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602a4</Role>
      <ShortName>S-K 1602(a)(4) Forepart, Adjusted NTBV</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>99554.2.2.6 - Disclosure - S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602b6</Role>
      <ShortName>S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>99554.2.3 - Disclosure - S-K 1602(c) Dilution</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602c</Role>
      <ShortName>S-K 1602(c) Dilution</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>99554.3 - Disclosure - S-K 1603, SPAC Sponsor; Conflicts of Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603</Role>
      <ShortName>S-K 1603, SPAC Sponsor; Conflicts of Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>99554.3.1 - Disclosure - S-K 1603(a) SPAC Sponsor</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603a</Role>
      <ShortName>S-K 1603(a) SPAC Sponsor</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>99554.3.1.7.1 - Disclosure - S-K 1603(a)(7) Sponsor Controlling Persons</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603a71</Role>
      <ShortName>S-K 1603(a)(7) Sponsor Controlling Persons</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>99554.3.1.9 - Disclosure - S-K 1603(a)(9) Restrictions on Selling Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603a9</Role>
      <ShortName>S-K 1603(a)(9) Restrictions on Selling Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>99554.3.2 - Disclosure - S-K 1603(b) Conflicts of Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603b</Role>
      <ShortName>S-K 1603(b) Conflicts of Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ea0272676-02.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>99554.3.3 - Disclosure - S-K 1603(c) Fiduciary Duties to Other Companies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603c</Role>
      <ShortName>S-K 1603(c) Fiduciary Duties to Other Companies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ea027267602ex-fee_longtable.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210 - Document - Submission</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/submissionTable</Role>
      <ShortName>Submission</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ea027267602ex-fee_longtable.htm">
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995211 - Document - Offerings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/feesOfferingTable</Role>
      <ShortName>Offerings</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ea027267602ex-fee_longtable.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995215 - Document - Fees Summary</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/feesSummaryTable</Role>
      <ShortName>Fees Summary</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>15</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="S-1/A" original="ea0272676-02.htm">ea0272676-02.htm</File>
    <File>ltgr-20260302.xsd</File>
    <File>ltgr-20260302_def.xml</File>
    <File>ltgr-20260302_lab.xml</File>
    <File>ltgr-20260302_pre.xml</File>
    <File doctype="EX-FILING FEES" original="ea027267602ex-fee_longtable.htm">ea027267602ex-fee_longtable.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="12">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="72">http://xbrl.sec.gov/ffd/2025</BaseTaxonomy>
    <BaseTaxonomy items="243">http://xbrl.sec.gov/spac/2025q3</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
