<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>210</ContextCount>
  <ElementCount>252</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>50</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/BalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/BalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement - Condensed Consolidated Statements of Shareholders' Deficit (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StatementsOfShareholdersDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Shareholders' Deficit (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00000007 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StatementsOfCashFlowsParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>999013 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/BasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>999014 - Disclosure - LIQUIDITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/Liquidity</Role>
      <ShortName>LIQUIDITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>999015 - Disclosure - REVENUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/Revenue</Role>
      <ShortName>REVENUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>999016 - Disclosure - INVESTMENT IN HOTEL, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInHotelNet</Role>
      <ShortName>INVESTMENT IN HOTEL, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>999017 - Disclosure - INVESTMENT IN REAL ESTATE, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInRealEstateNet</Role>
      <ShortName>INVESTMENT IN REAL ESTATE, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>999018 - Disclosure - INVESTMENT IN MARKETABLE SECURITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInMarketableSecurities</Role>
      <ShortName>INVESTMENT IN MARKETABLE SECURITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>999019 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/FairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>999020 - Disclosure - CASH, CASH EQUIVALENTS AND RESTRICTED CASH</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/CashCashEquivalentsAndRestrictedCash</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND RESTRICTED CASH</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>999021 - Disclosure - STOCK BASED COMPENSATION PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StockBasedCompensationPlans</Role>
      <ShortName>STOCK BASED COMPENSATION PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>999022 - Disclosure - SEGMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/SegmentInformation</Role>
      <ShortName>SEGMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>999023 - Disclosure - OTHER NOTES PAYABLE</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/OtherNotesPayable</Role>
      <ShortName>OTHER NOTES PAYABLE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>999024 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/RelatedPartyTransactions</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>999025 - Disclosure - MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/MortgageNotesPayableAndMezzanineFinancing</Role>
      <ShortName>MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>999026 - Disclosure - ACCOUNTS PAYABLE AND OTHER LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/AccountsPayableAndOtherLiabilities</Role>
      <ShortName>ACCOUNTS PAYABLE AND OTHER LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>999027 - Disclosure - DISPOSITION OF REAL ESTATE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/DispositionOfRealEstate</Role>
      <ShortName>DISPOSITION OF REAL ESTATE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>999028 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/SubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>999029 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/BasisOfPresentationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>999030 - Disclosure - LIQUIDITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/LiquidityTables</Role>
      <ShortName>LIQUIDITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/Liquidity</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>999031 - Disclosure - REVENUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/RevenueTables</Role>
      <ShortName>REVENUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/Revenue</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>999032 - Disclosure - INVESTMENT IN HOTEL, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInHotelNetTables</Role>
      <ShortName>INVESTMENT IN HOTEL, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/InvestmentInHotelNet</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>999033 - Disclosure - INVESTMENT IN REAL ESTATE, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInRealEstateNetTables</Role>
      <ShortName>INVESTMENT IN REAL ESTATE, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/InvestmentInRealEstateNet</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>999034 - Disclosure - INVESTMENT IN MARKETABLE SECURITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInMarketableSecuritiesTables</Role>
      <ShortName>INVESTMENT IN MARKETABLE SECURITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/InvestmentInMarketableSecurities</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>999035 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/FairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/FairValueMeasurements</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>999036 - Disclosure - CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/CashCashEquivalentsAndRestrictedCashTables</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/CashCashEquivalentsAndRestrictedCash</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>999037 - Disclosure - STOCK BASED COMPENSATION PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StockBasedCompensationPlansTables</Role>
      <ShortName>STOCK BASED COMPENSATION PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/StockBasedCompensationPlans</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>999038 - Disclosure - SEGMENT INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/SegmentInformationTables</Role>
      <ShortName>SEGMENT INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/SegmentInformation</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>999039 - Disclosure - OTHER NOTES PAYABLE (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/OtherNotesPayableTables</Role>
      <ShortName>OTHER NOTES PAYABLE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/OtherNotesPayable</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>999040 - Disclosure - MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/MortgageNotesPayableAndMezzanineFinancingTables</Role>
      <ShortName>MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/MortgageNotesPayableAndMezzanineFinancing</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>999041 - Disclosure - ACCOUNTS PAYABLE AND OTHER LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/AccountsPayableAndOtherLiabilitiesTables</Role>
      <ShortName>ACCOUNTS PAYABLE AND OTHER LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://intgla.com/role/AccountsPayableAndOtherLiabilities</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>999042 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/BasisOfPresentationAndSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/BasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>999043 - Disclosure - LIQUIDITY (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/LiquidityDetailsNarrative</Role>
      <ShortName>LIQUIDITY (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/LiquidityTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>999044 - Disclosure - SCHEDULE OF MATERIAL FINANCING OBLIGATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfMaterialFinancingObligationDetails</Role>
      <ShortName>SCHEDULE OF MATERIAL FINANCING OBLIGATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>999045 - Disclosure - SCHEDULE OF HOTEL REVENUE DISAGGREGATION OF REVENUE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfHotelRevenueDisaggregationOfRevenueDetails</Role>
      <ShortName>SCHEDULE OF HOTEL REVENUE DISAGGREGATION OF REVENUE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>999046 - Disclosure - REVENUE (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/RevenueDetailsNarrative</Role>
      <ShortName>REVENUE (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/RevenueTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>999047 - Disclosure - SCHEDULE OF INVESTMENT IN HOTEL (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfInvestmentInHotelDetails</Role>
      <ShortName>SCHEDULE OF INVESTMENT IN HOTEL (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>999048 - Disclosure - INVESTMENT IN HOTEL, NET (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInHotelNetDetailsNarrative</Role>
      <ShortName>INVESTMENT IN HOTEL, NET (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/InvestmentInHotelNetTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>999049 - Disclosure - SCHEDULE OF INVESTMENT IN REAL ESTATE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfInvestmentInRealEstateDetails</Role>
      <ShortName>SCHEDULE OF INVESTMENT IN REAL ESTATE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>999050 - Disclosure - INVESTMENT IN REAL ESTATE, NET (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/InvestmentInRealEstateNetDetailsNarrative</Role>
      <ShortName>INVESTMENT IN REAL ESTATE, NET (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/InvestmentInRealEstateNetTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>999051 - Disclosure - SCHEDULE OF TRADING SECURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfTradingSecuritiesDetails</Role>
      <ShortName>SCHEDULE OF TRADING SECURITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>999052 - Disclosure - SCHEDULE OF NET GAINS (LOSSES) ON MARKETABLE SECURITIES COMPRISING OF REALIZED AND UNREALIZED GAINS (LOSSES) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfNetGainsLossesOnMarketableSecuritiesComprisingOfRealizedAndUnrealizedGainsLossesDetails</Role>
      <ShortName>SCHEDULE OF NET GAINS (LOSSES) ON MARKETABLE SECURITIES COMPRISING OF REALIZED AND UNREALIZED GAINS (LOSSES) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>999053 - Disclosure - SCHEDULE OF FAIR VALUE MEASUREMENT ON RECURRING BASIS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfFairValueMeasurementOnRecurringBasisDetails</Role>
      <ShortName>SCHEDULE OF FAIR VALUE MEASUREMENT ON RECURRING BASIS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>999054 - Disclosure - SCHEDULE OF DERIVATIVE INSTRUMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfDerivativeInstrumentDetails</Role>
      <ShortName>SCHEDULE OF DERIVATIVE INSTRUMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>999055 - Disclosure - FAIR VALUE MEASUREMENTS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/FairValueMeasurementsDetailsNarrative</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>999056 - Disclosure - SCHEDULE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfCashCashEquivalentsAndRestrictedCashDetails</Role>
      <ShortName>SCHEDULE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>999057 - Disclosure - SCHEDULE OF STOCK OPTION ACTIVITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfStockOptionActivityDetails</Role>
      <ShortName>SCHEDULE OF STOCK OPTION ACTIVITY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>999058 - Disclosure - STOCK BASED COMPENSATION PLANS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/StockBasedCompensationPlansDetailsNarrative</Role>
      <ShortName>STOCK BASED COMPENSATION PLANS (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/StockBasedCompensationPlansTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>999059 - Disclosure - SCHEDULE OF SEGMENT REPORTING INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfSegmentReportingInformationDetails</Role>
      <ShortName>SCHEDULE OF SEGMENT REPORTING INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>999060 - Disclosure - SEGMENT INFORMATION (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/SegmentInformationDetailsNarrative</Role>
      <ShortName>SEGMENT INFORMATION (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/SegmentInformationTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>999061 - Disclosure - SUMMARY OF OTHER NOTES PAYABLE (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/SummaryOfOtherNotesPayableDetails</Role>
      <ShortName>SUMMARY OF OTHER NOTES PAYABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>999062 - Disclosure - SCHEDULE OF FUTURE MINIMUM PRINCIPAL PAYMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfFutureMinimumPrincipalPaymentsDetails</Role>
      <ShortName>SCHEDULE OF FUTURE MINIMUM PRINCIPAL PAYMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>999063 - Disclosure - OTHER NOTES PAYABLE (Details Narrative)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/OtherNotesPayableDetailsNarrative</Role>
      <ShortName>OTHER NOTES PAYABLE (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/OtherNotesPayableTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>999064 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/RelatedPartyTransactionsDetailsNarrative</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/RelatedPartyTransactions</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>999065 - Disclosure - SCHEDULE OF FUTURE MINIMUM PAYMENT FOR MORTGAGE NOTES PAYABLE (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/ScheduleOfFutureMinimumPaymentForMortgageNotesPayableDetails</Role>
      <ShortName>SCHEDULE OF FUTURE MINIMUM PAYMENT FOR MORTGAGE NOTES PAYABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>999066 - Disclosure - MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING (Details Narrative)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://intgla.com/role/MortgageNotesPayableAndMezzanineFinancingDetailsNarrative</Role>
      <ShortName>MORTGAGE NOTES PAYABLE AND MEZZANINE FINANCING (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/MortgageNotesPayableAndMezzanineFinancingTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>999067 - Disclosure - SCHEDULE OF ACCOUNTS PAYABLE AND OTHER LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/ScheduleOfAccountsPayableAndOtherLiabilitiesDetails</Role>
      <ShortName>SCHEDULE OF ACCOUNTS PAYABLE AND OTHER LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="form10-q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>999068 - Disclosure - DISPOSITION OF REAL ESTATE (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://intgla.com/role/DispositionOfRealEstateDetailsNarrative</Role>
      <ShortName>DISPOSITION OF REAL ESTATE (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://intgla.com/role/DispositionOfRealEstate</ParentRole>
      <Position>65</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" isDefinitelyFs="true" isUsgaap="true" original="form10-q.htm">form10-q.htm</File>
    <File>intg-20260331.xsd</File>
    <File>intg-20260331_cal.xml</File>
    <File>intg-20260331_def.xml</File>
    <File>intg-20260331_lab.xml</File>
    <File>intg-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="4">http://fasb.org/srt/2026</BaseTaxonomy>
    <BaseTaxonomy items="1012">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
