Note 1 - Business Description	12 Months Ended
Dec. 31, 2023
Notes to Financial Statements
Nature of Operations [Text Block]	NOTE 1 - BUSINESS DESCRIPTION RBB Bancorp is a bank holding company registered under the Bank Holding Company Act of 1956, as amended. RBB Bancorp’s principal business is to serve as the holding company for its wholly owned banking subsidiaries, Royal Business Bank (“Bank”) and RBB Asset Management Company (“RAM”), collectively referred to herein as “the Company.” RBB Bancorp was formed in January 2011 as a bank holding company and RAM was formed in 2012 to hold and manage problem assets acquired in business combinations. When we refer to “we”, “us”, “our”, or the “Company”, we are referring to RBB Bancorp and its consolidated subsidiaries including the Bank, collectively. When we refer to the “parent company”, “Bancorp”, or the “holding company”, we are referring to RBB Bancorp, the parent company, on a stand-along basis. At December 31, 2023, the Company had total assets of $4.0 billion, gross consolidated loans (held for investment and held for sale) of $3.0 billion, total deposits of $3.2 billion and total shareholders' equity of $511.3 million. The Bank provides business-banking products and services predominantly to the Asian-American communities through full service branches located in Los Angeles County, Orange County and Ventura County in California, in the Las Vegas, Nevada and New York City metropolitan areas, Chicago (Illinois), Edison (New Jersey) and Honolulu (Hawaii). The products and services include commercial and investor real estate loans, business loans and lines of credit, Small Business Administration (“SBA”) 7A and 504 loans, mortgage loans, trade finance and a full range of depository accounts, including specialized services such as remote deposit, E-banking, and mobile banking. The Bank acquired the Honolulu, Hawaii branch (the “Hawaii Branch”) from Bank of the Orient (“BOTO”) on January 14, 2022. The Company operates full-service banking offices in Arcadia, Cerritos, Diamond Bar, Irvine, Los Angeles, Monterey Park, Oxnard, Rowland Heights, San Gabriel, Silver Lake, Torrance, and Westlake Village, California; Las Vegas, Nevada; Manhattan, Brooklyn, Flushing and Elmhurst, New York; the Chinatown and Bridgeport neighborhoods of Chicago, Illinois; Edison, New Jersey; and Honolulu, Hawaii. The Company's primary source of revenue is providing loans to customers, who are predominately small and middle-market businesses and individuals. The Company generates its revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities. The Company also derives income from noninterest sources, such as fees received in connection with various lending and deposit services, loan servicing, gain on sales of loans and wealth management services. The Company’s principle expenses include interest expense on deposits and other long-term debt, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense. The Company completed six whole bank acquisitions and one branch acquisition from July 2011 through January 2022. All of the Company’s acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. The Company previously disclosed that, on December 28, 2021, it entered into a definitive agreement to acquire Gateway Bank F.S.B. (“Gateway”) in an all cash transaction, subject to certain terms and conditions. On September 28, 2023, the Company announced that it and Gateway have mutually agreed to terminate the definitive agreement, effective as of September 28, 2023. Neither party has or will have any liability or pay any penalty to the other party as a result of the termination, and each party has released the other from any and all claims related to the definitive agreement or the transactions contemplated by the definitive agreement.

Note 1 - Business Description

12 Months Ended

Dec. 31, 2023

NOTE 1 - BUSINESS DESCRIPTION

RBB Bancorp is a bank holding company registered under the Bank Holding Company Act of 1956, as amended. RBB Bancorp’s principal business is to serve as the holding company for its wholly owned banking subsidiaries, Royal Business Bank (“Bank”) and RBB Asset Management Company (“RAM”), collectively referred to herein as “the Company.” RBB Bancorp was formed in January 2011 as a bank holding company and RAM was formed in 2012 to hold and manage problem assets acquired in business combinations. When we refer to “we”, “us”, “our”, or the “Company”, we are referring to RBB Bancorp and its consolidated subsidiaries including the Bank, collectively. When we refer to the “parent company”, “Bancorp”, or the “holding company”, we are referring to RBB Bancorp, the parent company, on a stand-along basis.

At December 31, 2023, the Company had total assets of $4.0 billion, gross consolidated loans (held for investment and held for sale) of $3.0 billion, total deposits of $3.2 billion and total shareholders' equity of $511.3 million.

The Bank provides business-banking products and services predominantly to the Asian-American communities through full service branches located in Los Angeles County, Orange County and Ventura County in California, in the Las Vegas, Nevada and New York City metropolitan areas, Chicago (Illinois), Edison (New Jersey) and Honolulu (Hawaii). The products and services include commercial and investor real estate loans, business loans and lines of credit, Small Business Administration (“SBA”) 7A and 504 loans, mortgage loans, trade finance and a full range of depository accounts, including specialized services such as remote deposit, E-banking, and mobile banking. The Bank acquired the Honolulu, Hawaii branch (the “Hawaii Branch”) from Bank of the Orient (“BOTO”) on January 14, 2022.

The Company operates full-service banking offices in Arcadia, Cerritos, Diamond Bar, Irvine, Los Angeles, Monterey Park, Oxnard, Rowland Heights, San Gabriel, Silver Lake, Torrance, and Westlake Village, California; Las Vegas, Nevada; Manhattan, Brooklyn, Flushing and Elmhurst, New York; the Chinatown and Bridgeport neighborhoods of Chicago, Illinois; Edison, New Jersey; and Honolulu, Hawaii. The Company's primary source of revenue is providing loans to customers, who are predominately small and middle-market businesses and individuals.

The Company generates its revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities. The Company also derives income from noninterest sources, such as fees received in connection with various lending and deposit services, loan servicing, gain on sales of loans and wealth management services. The Company’s principle expenses include interest expense on deposits and other long-term debt, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense.

The Company completed six whole bank acquisitions and one branch acquisition from July 2011 through January 2022. All of the Company’s acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. The Company previously disclosed that, on December 28, 2021, it entered into a definitive agreement to acquire Gateway Bank F.S.B. (“Gateway”) in an all cash transaction, subject to certain terms and conditions. On September 28, 2023, the Company announced that it and Gateway have mutually agreed to terminate the definitive agreement, effective as of September 28, 2023. Neither party has or will have any liability or pay any penalty to the other party as a result of the termination, and each party has released the other from any and all claims related to the definitive agreement or the transactions contemplated by the definitive agreement.