Note 1 - Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2025
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations The Company is a financial holding company, headquartered in Baton Rouge, Louisiana that provides full banking services, excluding trust services, through its wholly-owned banking subsidiary, Investar Bank, National Association, a national bank, primarily to meet the needs of individuals, professionals and small to medium-sized businesses. The Company’s primary markets are in south Louisiana, southeast Texas and Alabama. At June 30, 2025 , the Company operated 20 full service branches located in Louisiana, three full service branches located in Texas and six full service branches located in Alabama and had 337 full-time equivalent employees. Basis of Presentation The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations, and cash flows in conformity with GAAP. However, in the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the financial statements have been included. The results of operations for the three and six month periods ended June 30, 2025 are not necessarily indicative of the results that may be expected for the entire fiscal year. These statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2024, including the notes thereto, which were included as part of the Company’s Annual Report. Prior period consolidated financial statements are reclassified whenever necessary to conform to the current period presentation. No reclassifications of prior period balances were material to the consolidated financial statements. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation. Segment Reporting The Company determined that all of its banking operations serve a similar customer base, offer similar products and services, and are managed through similar processes. Therefore, the Company’s banking operations are aggregated into one reportable operating segment, which generates income principally from interest on loans and, to a lesser extent, securities investments, as well as from fees charged in connection with various loan and deposit services. The CODM is the Chief Executive Officer, who for the purposes of assessing performance, making operating decisions, and allocating Company resources, regularly reviews net income as reported in the accompanying consolidated statements of income. The level of disaggregation and amounts of significant segment income and expenses that are regularly provided to the CODM are the same as those presented in the accompanying consolidated statements of income. Likewise, the measure of segment assets is reported on the accompanying consolidated balance sheets as total assets. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material. Material estimates that are particularly susceptible to significant change relate to the determination of the ACL. While management uses available information to recognize credit losses on loans, future additions to the ACL may be necessary based on changes in economic conditions, changes in conditions of borrowers’ industries or changes in the condition of individual borrowers. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s ACL. Such agencies may require the Company to recognize additions to the ACL based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the ACL may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated. Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of other-than-temporary impairments of securities, and the fair value of financial instruments and goodwill. A changing interest rate environment, elevated levels of inflation and changing U.S. trade and tariff policies have made certain estimates more challenging, including those discussed above. Accounting Standards Adopted in 2025 FASB ASC Topic 740 “Income Taxes - Improvements to Income Tax Disclosures” Update No. 2023-09 (“ASU 2023-09”). In December 2023, the FASB issued ASU 2023-09, which enhances the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires disclosure of additional categories of information about federal, state and foreign income taxes in the rate reconciliation table and requires companies to provide more information about the reconciling items in some categories if a quantitative threshold is met. ASU 2023-09 became effective for the Company on January 1, 2025. The Company will provide the required disclosures in its Annual Report on Form 10-K for the year ended December 31, 2025, and the adoption of ASU 2023-09 is not expected to have a material impact on the Company’s consolidated financial statements. Recent Accounting Pronouncements FASB “Disclosure Improvements” Update No. 2023-06 (“ASU 2023-06”). In October 2023, the FASB issued ASU 2023-06, which amends the disclosure or presentation requirements related to various topics. The amendment is intended to align GAAP with the SEC’s regulations. ASU 2023-06 is required to be applied prospectively, and early adoption is prohibited. For reporting entities subject to the SEC’s existing disclosure requirements, the effective dates of ASU 2023-06 will be the date on which the SEC’s removal of that related disclosure requirement from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K, the pending content of the related amendment will be removed and will not become effective for any entities. ASU 2023-06 is not expected to have a material impact on the Company’s consolidated financial statements. FASB ASC Topic 220 “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures: Disaggregation of Income Statement Expenses” Update No. 2024-03 (“ASU 2024-03”). In November 2024, the FASB issued ASU 2024-03, which requires disaggregated disclosure of income statement expenses in a tabular format in the notes of the financial statements for public business entities. ASU 2024-03 is effective on a prospective basis for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption and retrospective application permitted. The Company is currently evaluating the provisions of the amendment and the impact on its future consolidated financial statements.

Note 1 - Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2025

Significant Accounting Policies [Text Block]

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

The Company is a financial holding company, headquartered in Baton Rouge, Louisiana that provides full banking services, excluding trust services, through its wholly-owned banking subsidiary, Investar Bank, National Association, a national bank, primarily to meet the needs of individuals, professionals and small to medium-sized businesses. The Company’s primary markets are in south Louisiana, southeast Texas and Alabama. At June 30, 2025 , the Company operated 20 full service branches located in Louisiana, three full service branches located in Texas and six full service branches located in Alabama and had 337 full-time equivalent employees.

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations, and cash flows in conformity with GAAP. However, in the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the financial statements have been included. The results of operations for the three and six month periods ended June 30, 2025 are not necessarily indicative of the results that may be expected for the entire fiscal year. These statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2024, including the notes thereto, which were included as part of the Company’s Annual Report.

Prior period consolidated financial statements are reclassified whenever necessary to conform to the current period presentation. No reclassifications of prior period balances were material to the consolidated financial statements.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation.

Segment Reporting

The Company determined that all of its banking operations serve a similar customer base, offer similar products and services, and are managed through similar processes. Therefore, the Company’s banking operations are aggregated into one reportable operating segment, which generates income principally from interest on loans and, to a lesser extent, securities investments, as well as from fees charged in connection with various loan and deposit services. The CODM is the Chief Executive Officer, who for the purposes of assessing performance, making operating decisions, and allocating Company resources, regularly reviews net income as reported in the accompanying consolidated statements of income. The level of disaggregation and amounts of significant segment income and expenses that are regularly provided to the CODM are the same as those presented in the accompanying consolidated statements of income. Likewise, the measure of segment assets is reported on the accompanying consolidated balance sheets as total assets.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material.

Material estimates that are particularly susceptible to significant change relate to the determination of the ACL. While management uses available information to recognize credit losses on loans, future additions to the ACL may be necessary based on changes in economic conditions, changes in conditions of borrowers’ industries or changes in the condition of individual borrowers. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s ACL. Such agencies may require the Company to recognize additions to the ACL based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the ACL may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated.

Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of other-than-temporary impairments of securities, and the fair value of financial instruments and goodwill. A changing interest rate environment, elevated levels of inflation and changing U.S. trade and tariff policies have made certain estimates more challenging, including those discussed above.

Accounting Standards Adopted in 2025

FASB ASC Topic 740 “Income Taxes - Improvements to Income Tax Disclosures” Update No. 2023-09 (“ASU 2023-09”). In December 2023, the FASB issued ASU 2023-09, which enhances the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires disclosure of additional categories of information about federal, state and foreign income taxes in the rate reconciliation table and requires companies to provide more information about the reconciling items in some categories if a quantitative threshold is met. ASU 2023-09 became effective for the Company on January 1, 2025. The Company will provide the required disclosures in its Annual Report on Form 10-K for the year ended December 31, 2025, and the adoption of ASU 2023-09 is not expected to have a material impact on the Company’s consolidated financial statements.

Recent Accounting Pronouncements

FASB “Disclosure Improvements” Update No. 2023-06 (“ASU 2023-06”). In October 2023, the FASB issued ASU 2023-06, which amends the disclosure or presentation requirements related to various topics. The amendment is intended to align GAAP with the SEC’s regulations. ASU 2023-06 is required to be applied prospectively, and early adoption is prohibited. For reporting entities subject to the SEC’s existing disclosure requirements, the effective dates of ASU 2023-06 will be the date on which the SEC’s removal of that related disclosure requirement from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K, the pending content of the related amendment will be removed and will not become effective for any entities. ASU 2023-06 is not expected to have a material impact on the Company’s consolidated financial statements.

FASB ASC Topic 220 “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures: Disaggregation of Income Statement Expenses” Update No. 2024-03 (“ASU 2024-03”). In November 2024, the FASB issued ASU 2024-03, which requires disaggregated disclosure of income statement expenses in a tabular format in the notes of the financial statements for public business entities. ASU 2024-03 is effective on a prospective basis for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption and retrospective application permitted. The Company is currently evaluating the provisions of the amendment and the impact on its future consolidated financial statements.

Investar Holding Corp 10-Q