    <SEC-DOCUMENT>0001437749-23-028780-index.html : 20231023
    <SEC-HEADER>0001437749-23-028780.hdr.sgml : 20231023
    <ACCEPTANCE-DATETIME>20231023171243
    ACCESSION NUMBER:		0001437749-23-028780
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		36
    CONFORMED PERIOD OF REPORT:	20231019
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20231023
    DATE AS OF CHANGE:		20231023

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			RBB Bancorp
    		CENTRAL INDEX KEY:			0001499422
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				272776416
    		STATE OF INCORPORATION:			CA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38149
    		FILM NUMBER:		231340557

    	BUSINESS ADDRESS:
    		STREET 1:		1055 WILSHIRE BOULEVARD
    		STREET 2:		SUITE 1200
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90017
    		BUSINESS PHONE:		213-533-7918

    	MAIL ADDRESS:
    		STREET 1:		1055 WILSHIRE BOULEVARD
    		STREET 2:		SUITE 1200
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90017
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>rbb20230905_8k.htm
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    <TEXT>
    Document 1 - file: rbb20230905_8k.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex_567163.htm
    <DESCRIPTION>EXHIBIT 99.1
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    Document 2 - file: ex_567163.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ex_584487.htm
    <DESCRIPTION>EXHIBIT 99.2
    <TEXT>
    Document 3 - file: ex_584487.htm

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    <DOCUMENT>
    <TYPE>EX-99.3
    <SEQUENCE>4
    <FILENAME>ex_567165.htm
    <DESCRIPTION>EXHIBIT 99.3
    <TEXT>
    Document 4 - file: ex_567165.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>rbb-20231019.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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    <SEQUENCE>6
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    <SEQUENCE>9
    <FILENAME>logo.jpg
    <TEXT>
    Document 9 - file: logo.jpg

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    <SEQUENCE>10
    <FILENAME>rbbslide01.jpg
    <TEXT>
    Document 10 - file: rbbslide01.jpg

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    <SEQUENCE>11
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    Document 11 - file: rbbslide02.jpg

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    <FILENAME>rbbslide03.jpg
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    Document 12 - file: rbbslide03.jpg

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    <SEQUENCE>13
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    Document 13 - file: rbbslide04.jpg

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    Document 16 - file: rbbslide07.jpg

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    Document 17 - file: rbbslide08.jpg

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    <SEQUENCE>18
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    Document 18 - file: rbbslide09.jpg

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    Document 19 - file: rbbslide10.jpg

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    Document 20 - file: rbbslide11.jpg

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    <SEQUENCE>21
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    Document 21 - file: rbbslide12.jpg

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    <SEQUENCE>22
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    Document 22 - file: rbbslide13.jpg

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    <SEQUENCE>23
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    <TEXT>
    Document 23 - file: rbbslide14.jpg

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    <SEQUENCE>24
    <FILENAME>rbbslide15.jpg
    <TEXT>
    Document 24 - file: rbbslide15.jpg

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    <SEQUENCE>25
    <FILENAME>rbbslide16.jpg
    <TEXT>
    Document 25 - file: rbbslide16.jpg

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    <SEQUENCE>26
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    Document 26 - file: rbbslide17.jpg

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    <SEQUENCE>27
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    Document 27 - file: rbbslide18.jpg

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    <SEQUENCE>28
    <FILENAME>rbbslide19.jpg
    <TEXT>
    Document 28 - file: rbbslide19.jpg

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    <SEQUENCE>29
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 29 - file: R1.htm

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    <SEQUENCE>30
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    Document 30 - RAW XML: rbb20230905_8k_htm.xml

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    <TYPE>EXCEL
    <SEQUENCE>31
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    Document 31 - file: Financial_Report.xlsx

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    <SEQUENCE>32
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    <TEXT>
    Document 32 - file: Show.js

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    <SEQUENCE>33
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    <TEXT>
    Document 33 - file: report.css

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>34
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    Document 34 - file: FilingSummary.html

    Document 34 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>36
    <FILENAME>MetaLinks.json
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    Document 36 - file: MetaLinks.json

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    <SEQUENCE>37
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