General	9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	1. GENERAL The accompanying unaudited interim condensed consolidated financial statements include the accounts of First US Bancshares, Inc. (“Bancshares”) and its subsidiaries (collectively, the “Company”). Bancshares is the parent holding company of First US Bank (the “Bank”). The Company and the Bank are both headquartered in Birmingham, Alabama. As of September 30, 2023, the Bank operated a finance company subsidiary, Acceptance Loan Company, Inc. (“ALC”). During the third quarter of 2021, ALC ceased new business development and permanently closed its 20 branch lending locations in Alabama and Mississippi to the public. Through the third quarter of 2023, ALC continued to service its remaining portfolio of loans from its headquarters in Mobile, Alabama. Effective October 1, 2023, all of ALC’s remaining loans were sold to the Bank in an intercompany transaction. Due to this transaction, management determined that ALC was no longer a separate reportable operating segment. The Bank intends to manage the remaining portfolio through final resolution. All significant intercompany transactions and accounts have been eliminated. The unaudited interim condensed consolidated financial statements, in the opinion of management, reflect all adjustments necessary for a fair presentation of the Company’s consolidated financial position, results of operations and cash flows for the periods presented. Such adjustments are of a normal, recurring nature, except for the adoption of Accounting Standards Codification (“ASC”) 326, Measurement of Credit Losses on Financial Instruments, as discussed below. The results of operations for any interim period are not necessarily indicative of results expected for the fiscal year ending December 31, 2023. While certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), management believes that the disclosures herein are adequate to make the information presented not misleading. These unaudited interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K as of and for the year ended December 31, 2022 (the "Company's 2022 Form 10-K").

General

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

GENERAL

The accompanying unaudited interim condensed consolidated financial statements include the accounts of First US Bancshares, Inc. (“Bancshares”) and its subsidiaries (collectively, the “Company”). Bancshares is the parent holding company of First US Bank (the “Bank”). The Company and the Bank are both headquartered in Birmingham, Alabama. As of September 30, 2023, the Bank operated a finance company subsidiary, Acceptance Loan Company, Inc. (“ALC”). During the third quarter of 2021, ALC ceased new business development and permanently closed its 20 branch lending locations in Alabama and Mississippi to the public. Through the third quarter of 2023, ALC continued to service its remaining portfolio of loans from its headquarters in Mobile, Alabama. Effective October 1, 2023, all of ALC’s remaining loans were sold to the Bank in an intercompany transaction. Due to this transaction, management determined that ALC was no longer a separate reportable operating segment. The Bank intends to manage the remaining portfolio through final resolution. All significant intercompany transactions and accounts have been eliminated.

The unaudited interim condensed consolidated financial statements, in the opinion of management, reflect all adjustments necessary for a fair presentation of the Company’s consolidated financial position, results of operations and cash flows for the periods presented. Such adjustments are of a normal, recurring nature, except for the adoption of Accounting Standards Codification (“ASC”) 326, Measurement of Credit Losses on Financial Instruments, as discussed below. The results of operations for any interim period are not necessarily indicative of results expected for the fiscal year ending December 31, 2023. While certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), management believes that the disclosures herein are adequate to make the information presented not misleading. These unaudited interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K as of and for the year ended December 31, 2022 (the "Company's 2022 Form 10-K").