Note 1 - Business Description	3 Months Ended
Mar. 31, 2021
Notes to Financial Statements
Nature of Operations [Text Block]	NOTE 1 - BUSINESS DESCRIPTION RBB Bancorp (“RBB”) is a financial 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". RAM was formed to hold and manage problem assets acquired in business combinations. At March 31, 2021, the Company had total consolidated assets of $3.7 billion, gross consolidated loans (held for investment and held for sale) of $2.8 billion, total consolidated deposits of $2.8 billion and total consolidated stockholders' equity of $435.7 million. RBB’s common stock trades on the Nasdaq Global Select Market under the symbol “RBB”. The Bank provides business-banking services to the Chinese-American communities in Los Angeles County, Orange County and Ventura County in California, in Las Vegas, Nevada, the New York City, New York metropolitan area, including Edison, New Jersey, and Chicago, Illinois. Specific services include remote deposit, E-banking, mobile banking, 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. 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; and Edison, New Jersey. The Company’s primary source of revenue is providing loans to customers, who are predominantly 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 subordinated debentures, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense. The Company has completed six acquisitions from July 2011 through January 2020, including the acquisition of Pacific Global Bank Holdings, Inc. (“PGBH”) and its wholly-owned subsidiary, Pacific Global Bank (“PGB”), in which the PGBH acquisition closed on January 10, 2020. PGB operated branches in the Chicago neighborhoods of Chinatown and Bridgeport. See Note 3 – Acquisition, for more information about the PGBH acquisition transaction. 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.

Note 1 - Business Description

3 Months Ended

Mar. 31, 2021

NOTE 1 - BUSINESS DESCRIPTION

RBB Bancorp (“RBB”) is a financial 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". RAM was formed to hold and manage problem assets acquired in business combinations.

At March 31, 2021, the Company had total consolidated assets of $3.7 billion, gross consolidated loans (held for investment and held for sale) of $2.8 billion, total consolidated deposits of $2.8 billion and total consolidated stockholders' equity of $435.7 million. RBB’s common stock trades on the Nasdaq Global Select Market under the symbol “RBB”.

The Bank provides business-banking services to the Chinese-American communities in Los Angeles County, Orange County and Ventura County in California, in Las Vegas, Nevada, the New York City, New York metropolitan area, including Edison, New Jersey, and Chicago, Illinois. Specific services include remote deposit, E-banking, mobile banking, 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.

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; and Edison, New Jersey. The Company’s primary source of revenue is providing loans to customers, who are predominantly 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 subordinated debentures, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense.

The Company has completed six acquisitions from July 2011 through January 2020, including the acquisition of Pacific Global Bank Holdings, Inc. (“PGBH”) and its wholly-owned subsidiary, Pacific Global Bank (“PGB”), in which the PGBH acquisition closed on January 10, 2020. PGB operated branches in the Chicago neighborhoods of Chinatown and Bridgeport. See Note 3 – Acquisition, for more information about the PGBH acquisition transaction. 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.