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            <identifier scheme="http://www.sec.gov/CIK">0001423869</identifier>
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            <startDate>2026-07-22</startDate>
            <endDate>2026-07-22</endDate>
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    <dei:EntityCentralIndexKey contextRef="c-1" id="f-22">0001423869</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="c-1" id="f-23">true</dei:AmendmentFlag>
    <dei:DocumentType contextRef="c-1" id="f-1">8-K/A</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="c-1" id="f-2">2026-07-22</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="c-1" id="f-3">PCB BANCORP</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="c-1" id="f-4">CA</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="c-1" id="f-5">001-38621</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="c-1" id="f-6">20-8856755</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="c-1" id="f-7">3701 Wilshire Boulevard</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="c-1" id="f-8">Suite 900</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="c-1" id="f-9">Los Angeles</dei:EntityAddressCityOrTown>
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    <dei:Security12bTitle contextRef="c-1" id="f-18">Common stock, no par value</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="c-1" id="f-19">PCB</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="c-1" id="f-20">NASDAQ</dei:SecurityExchangeName>
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    <dei:AmendmentDescription contextRef="c-1" id="f-24">Explanatory NoteOn July 23, 2026, PCB Bancorp (the &#x201c;Company&#x201d;) filed with the U.S. Securities and Exchange Commission a Current Report on Form 8-K (&#x201c;Initial Form 8-K&#x201d;), which included an investor presentation that was furnished as Exhibit 99.2 to the Initial Form 8-K (the &#x201c;Investor Presentation&#x201d;).The Company is filing this Amendment No. 1 to Form 8-K solely to correct certain inadvertent errors in the Time Deposit Maturity Table in the Investor Presentation.All other information contained in, filed with or furnished with the Initial Form 8-K remains unchanged, including, among other items, the Corporation&#x2019;s earnings release dated July 23, 2026 that was furnished as Exhibit 99.1 and its press release dated July 23, 2026 announcing the declaration of a dividend, which was filed as Exhibit 99.3.</dei:AmendmentDescription>
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