<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>92</ContextCount>
  <ElementCount>194</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>24</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - CONDENSED CONSOLIDATED STATEMENT OF EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFEQUITY</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENT OF EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Disclosure - ORGANIZATION AND BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/ORGANIZATIONANDBUSINESS</Role>
      <ShortName>ORGANIZATION AND BUSINESS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000007 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000008 - Disclosure - VARIABLE INTEREST ENTITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/VARIABLEINTERESTENTITIES</Role>
      <ShortName>VARIABLE INTEREST ENTITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIES</Role>
      <ShortName>LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - Deferred Costs, Capitalized, Prepaid, and Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/DeferredCostsCapitalizedPrepaidandOtherAssets</Role>
      <ShortName>Deferred Costs, Capitalized, Prepaid, and Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - NOTES PAYABLE, NET</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENET</Role>
      <ShortName>NOTES PAYABLE, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - FAIR VALUE DISCLOSURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/FAIRVALUEDISCLOSURES</Role>
      <ShortName>FAIR VALUE DISCLOSURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EQUITY</Role>
      <ShortName>EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - EARNINGS PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EARNINGSPERSHARE</Role>
      <ShortName>EARNINGS PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/RELATEDPARTYTRANSACTIONS</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/SUBSEQUENTEVENTSSUBSEQUENTEVENTS</Role>
      <ShortName>SUBSEQUENT EVENTS SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000021 - Disclosure - VARIABLE INTEREST ENTITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/VARIABLEINTERESTENTITIESTables</Role>
      <ShortName>VARIABLE INTEREST ENTITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/VARIABLEINTERESTENTITIES</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000022 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/LEASES</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIESTables</Role>
      <ShortName>LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIES</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - Deferred Costs, Capitalized, Prepaid, and Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/DeferredCostsCapitalizedPrepaidandOtherAssetsTables</Role>
      <ShortName>Deferred Costs, Capitalized, Prepaid, and Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/DeferredCostsCapitalizedPrepaidandOtherAssets</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - NOTES PAYABLE, NET (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENETTables</Role>
      <ShortName>NOTES PAYABLE, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/NOTESPAYABLENET</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000027 - Disclosure - EARNINGS PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EARNINGSPERSHARETables</Role>
      <ShortName>EARNINGS PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/EARNINGSPERSHARE</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/RELATEDPARTYTRANSACTIONSTables</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://srtreit.com/role/RELATEDPARTYTRANSACTIONS</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000029 - Disclosure - ORGANIZATION AND BUSINESS (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/ORGANIZATIONANDBUSINESSDetailsTextual</Role>
      <ShortName>ORGANIZATION AND BUSINESS (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/ORGANIZATIONANDBUSINESS</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Cash, Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCashCashEquivalentsandRestrictedCashDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Cash, Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>0000031 - Disclosure - VARIABLE INTEREST ENTITIES SUNSET &amp; GARDER (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/VARIABLEINTERESTENTITIESSUNSETGARDERDetails</Role>
      <ShortName>VARIABLE INTEREST ENTITIES SUNSET &amp; GARDER (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>0000032 - Disclosure - VARIABLE INTEREST ENTITIES 3032 WILSHIRE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/VARIABLEINTERESTENTITIES3032WILSHIREDetails</Role>
      <ShortName>VARIABLE INTEREST ENTITIES 3032 WILSHIRE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>0000033 - Disclosure - VARIABLE INTEREST ENTITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/VARIABLEINTERESTENTITIESDetails</Role>
      <ShortName>VARIABLE INTEREST ENTITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/VARIABLEINTERESTENTITIESTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>0000034 - Disclosure - LEASES (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASESDetailsTextual</Role>
      <ShortName>LEASES (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/LEASESTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>0000035 - Disclosure - LEASES LEASES (Income from Real Estate Operations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASESLEASESIncomefromRealEstateOperationsDetails</Role>
      <ShortName>LEASES LEASES (Income from Real Estate Operations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>0000037 - Disclosure - LEASES (Future Minimum Lease Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASESFutureMinimumLeasePaymentsDetails</Role>
      <ShortName>LEASES (Future Minimum Lease Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/LEASESTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>0000038 - Disclosure - LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIESDetails</Role>
      <ShortName>LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIESTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>0000039 - Disclosure - LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES LEASE INTANGIBLE AND BELOW-MARKET LEASE AMORTIZATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/LEASEINTANGIBLESANDBELOWMARKETLEASELIABILITIESLEASEINTANGIBLEANDBELOWMARKETLEASEAMORTIZATIONDetails</Role>
      <ShortName>LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES LEASE INTANGIBLE AND BELOW-MARKET LEASE AMORTIZATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>0000040 - Disclosure - Deferred Costs, Capitalized, Prepaid, and Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/DeferredCostsCapitalizedPrepaidandOtherAssetsDetails</Role>
      <ShortName>Deferred Costs, Capitalized, Prepaid, and Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/DeferredCostsCapitalizedPrepaidandOtherAssetsTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>0000041 - Disclosure - NOTES PAYABLE, NET NOTES PAYABLE, NET (Multi-Property Secured Financing) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENETNOTESPAYABLENETMultiPropertySecuredFinancingDetails</Role>
      <ShortName>NOTES PAYABLE, NET NOTES PAYABLE, NET (Multi-Property Secured Financing) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>0000042 - Disclosure - NOTES PAYABLE, NET (Loans Secured by Properties Under Development) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENETLoansSecuredbyPropertiesUnderDevelopmentDetails</Role>
      <ShortName>NOTES PAYABLE, NET (Loans Secured by Properties Under Development) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/NOTESPAYABLENETTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>0000043 - Disclosure - NOTES PAYABLE, NET (Future Principal Payments) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENETFuturePrincipalPaymentsDetails</Role>
      <ShortName>NOTES PAYABLE, NET (Future Principal Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/NOTESPAYABLENETTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>0000044 - Disclosure - NOTES PAYABLE, NET NOTES PAYABLE, NET (Interest Expense) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://srtreit.com/role/NOTESPAYABLENETNOTESPAYABLENETInterestExpenseDetails</Role>
      <ShortName>NOTES PAYABLE, NET NOTES PAYABLE, NET (Interest Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>0000046 - Disclosure - EQUITY (Share Redemption) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EQUITYShareRedemptionDetails</Role>
      <ShortName>EQUITY (Share Redemption) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/EQUITY</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>0000047 - Disclosure - EQUITY EQUITY (Quarterly Distribution (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EQUITYEQUITYQuarterlyDistributionDetails</Role>
      <ShortName>EQUITY EQUITY (Quarterly Distribution (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>0000048 - Disclosure - EARNINGS PER SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EARNINGSPERSHAREDetails</Role>
      <ShortName>EARNINGS PER SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/EARNINGSPERSHARETables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>0000049 - Disclosure - EARNINGS PER SHARE (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/EARNINGSPERSHAREDetailsTextual</Role>
      <ShortName>EARNINGS PER SHARE (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/EARNINGSPERSHARETables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>0000050 - Disclosure - RELATED PARTY TRANSACTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/RELATEDPARTYTRANSACTIONSDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/RELATEDPARTYTRANSACTIONSTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="srtr-20230331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>0000051 - Disclosure - RELATED PARTY TRANSACTIONS (Details) (Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://srtreit.com/role/RELATEDPARTYTRANSACTIONSDetailsNarrative</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details) (Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://srtreit.com/role/RELATEDPARTYTRANSACTIONSTables</ParentRole>
      <Position>48</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="srtr-20230331.htm">srtr-20230331.htm</File>
    <File>exhibit311-3312023.htm</File>
    <File>exhibit312-3312023.htm</File>
    <File>exhibit321-3312023.htm</File>
    <File>exhibit322-3312023.htm</File>
    <File>planofcompleteliquidationa.htm</File>
    <File>srtr-20230331.xsd</File>
    <File>srtr-20230331_cal.xml</File>
    <File>srtr-20230331_def.xml</File>
    <File>srtr-20230331_lab.xml</File>
    <File>srtr-20230331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="381">http://fasb.org/us-gaap/2023</BaseTaxonomy>
    <BaseTaxonomy items="26">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
