<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:SQFT="http://presidiopt.com/20220107"
  xmlns:dei="http://xbrl.sec.gov/dei/2021q4"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2021-01-31"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="sqft-20220107.xsd" xlink:type="simple"/>
    <context id="From2022-01-07to2022-01-07">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001080657</identifier>
        </entity>
        <period>
            <startDate>2022-01-07</startDate>
            <endDate>2022-01-07</endDate>
        </period>
    </context>
    <context id="From2022-01-072022-01-07_custom_SeriesCommonStock0.01ParMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001080657</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">SQFT:SeriesCommonStock0.01ParMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-01-07</startDate>
            <endDate>2022-01-07</endDate>
        </period>
    </context>
    <context id="From2022-01-072022-01-07_custom_Sec9.375SeriesDCumulativeMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001080657</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">SQFT:Sec9.375SeriesDCumulativeMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-01-07</startDate>
            <endDate>2022-01-07</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <unit id="USDPShares">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <dei:EntityCentralIndexKey contextRef="From2022-01-07to2022-01-07">0001080657</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="From2022-01-07to2022-01-07">false</dei:AmendmentFlag>
    <dei:DocumentType contextRef="From2022-01-07to2022-01-07">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="From2022-01-07to2022-01-07">2022-01-07</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="From2022-01-07to2022-01-07">Presidio Property Trust, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="From2022-01-07to2022-01-07">MD</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="From2022-01-07to2022-01-07">001-34049</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="From2022-01-07to2022-01-07">33-0841255</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="From2022-01-07to2022-01-07">4995 Murphy Canyon Road</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="From2022-01-07to2022-01-07">Suite 300</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="From2022-01-07to2022-01-07">San Diego</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="From2022-01-07to2022-01-07">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="From2022-01-07to2022-01-07">92123</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="From2022-01-07to2022-01-07">(760)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="From2022-01-07to2022-01-07">471-8536</dei:LocalPhoneNumber>
    <dei:EntityInformationFormerLegalOrRegisteredName contextRef="From2022-01-07to2022-01-07">Not Applicable</dei:EntityInformationFormerLegalOrRegisteredName>
    <dei:WrittenCommunications contextRef="From2022-01-07to2022-01-07">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="From2022-01-07to2022-01-07">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="From2022-01-07to2022-01-07">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="From2022-01-07to2022-01-07">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="From2022-01-072022-01-07_custom_SeriesCommonStock0.01ParMember">Series     A Common Stock, $0.01 par</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="From2022-01-072022-01-07_custom_SeriesCommonStock0.01ParMember">SQFT</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="From2022-01-072022-01-07_custom_SeriesCommonStock0.01ParMember">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="From2022-01-072022-01-07_custom_Sec9.375SeriesDCumulativeMember">9.375%     Series D Cumulative</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="From2022-01-072022-01-07_custom_Sec9.375SeriesDCumulativeMember">SQFTP</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="From2022-01-072022-01-07_custom_Sec9.375SeriesDCumulativeMember">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="From2022-01-07to2022-01-07">false</dei:EntityEmergingGrowthCompany>
</xbrl>
