Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	First National Corporation (the Company) is the bank holding company of First Bank (the Bank). The Company also owns First National (VA) Statutory Trust II (Trust II), and First National (VA) Statutory Trust III (Trust III and, together with Trust II, the Trusts). The Trusts were formed for the purpose of issuing redeemable capital securities, commonly known as trust preferred securities and are not included in the Company’s consolidated financial statements in accordance with authoritative accounting guidance because management has determined that the Trusts qualify as variable interest entities. The Bank owns First Bank Financial Services, Inc., which invests in entities that provide title insurance and investment services. The Bank owns Shen-Valley Land Holdings, LLC and ESF, LLC which were formed to hold other real estate owned and future office sites. The Bank offers loan, deposit, and wealth management products and services in the Shenandoah Valley, south-central regions of Virginia, the Roanoke Valley, the Richmond MSA, and in northern North Carolina. Loan products and services include consumer loans, residential mortgages, home equity loans, and commercial loans. Deposit products and services include checking accounts, treasury management solutions, savings accounts, money market accounts, certificates of deposit, and individual retirement accounts. Wealth management services include estate planning, investment management of assets, trustee under an agreement, trustee under a will, individual retirement accounts, and estate settlement. The Bank offers other services, including internet banking, mobile banking, remote deposit capture, and other traditional banking services. On October 1, 2024, the Company completed the acquisition of Touchstone Bankshares, Inc. (Touchstone). Touchstone’s results of operations are included in the Company’s consolidated results since the date of acquisition. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America and to accepted practices within the banking industry.
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The consolidated financial statements of First National Corporation include the accounts of all six companies. All material intercompany balances and transactions have been eliminated in consolidation, except for balances and transactions related to the Trusts. The subordinated debt of these Trusts is reflected as a liability of the Company.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that require the most subjective or complex judgments relate to the allowance for credit losses, loans acquired in a business combination, and goodwill.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Significant Group Concentrations of Credit Risk Most of the Company’s activities are with customers located within the Shenandoah Valley, south-central regions of Virginia, the Roanoke Valley, the Richmond MSA, and in northern North Carolina. The types of lending that the Company engages in are included in Note 4. The Company has a concentration of credit risk in commercial real estate but does not have a significant concentration to any one customer or industry.
Business Combinations Policy [Policy Text Block]	Acquisition Accounting The Company accounts for mergers and acquisitions that qualify as a business combination under ASC 805, Business Combinations, which requires the use of the acquisition method of accounting. Under the acquisition method, we record all identifiable assets acquired, including intangible assets and the liabilities assumed at their fair values as of the acquisition date. If the purchase price exceeds that of the net assets acquired, an unidentified intangible asset (goodwill) is recorded. If the purchase price is determined to be less than that of the net assets acquired at fair value, a bargain purchase gain is recorded in results of operations. Determining fair values of net assets acquired often involves estimates based on third-party valuations, such as appraisals or internal valuations based on discounted cash flow analysis or other valuation techniques. These methodologies are inherently subjective and involve significant assumptions, adjustments, and judgement around the selection of assumptions including, among others, discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The determination of the useful lives over which an intangible asset will be amortized is also subjective. While the selected fair values represent our best estimate of fair value as of the acquisition date, these estimates are inherently uncertain. In addition, the acquisition method of accounting allows for a measurement period to adjust acquisition accounting for up to one year after the acquisition date, for new information that existed at the acquisition date but may not have been known or available at that time. For further information, refer to Note 2 “Acquisitions” in Part I, Item 1 of this Annual Report. Acquired loans are recorded at their fair value at acquisition date without carryover of the acquiree’s previously established ACLL, as credit discounts are included in the determination of fair value. The fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected on the loans and then applying a market-based discount rate to those cash flows. During evaluation upon acquisition, acquired loans are also classified as either PCD or Non-PCD. Acquired loans are subject to the Company’s ACLL policy upon acquisition. For Non-PCD loans, the difference between the fair value and unpaid principal balance of the loan at acquisition date (premium or discount) is amortized or accreted into interest income over the life of the loans in accordance with ASC 310-20, Receivables – Nonrefundable Fees and Other Costs. If the acquired performing loan has revolving privileges, it is accounted for using the straight-line method; otherwise, the effective interest method is used. PCD loans are loans that have experienced more-than-insignificant credit deterioration since origination. PCD loans are recorded at the purchase price plus the initial allowance for credit losses. An ACLL is determined using the same methodology as other loans held for investment (LHFI). The sum of the loan’s purchase price and ACLL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan under ASC 310-20, Receivables – Nonrefundable Fees and Other Costs. If the loan has revolving privileges, the discount/premium is amortized/accreted using the straight-line method; otherwise, the effective interest method is used. Subsequent changes to the ACLL are recorded through provision expense.
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Goodwill and Other Intangible Assets Goodwill arises from business combinations and is determined as the excess fair value of the consideration transferred over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate that a goodwill impairment test should be performed. The Company has selected June 30 as the date to perform the annual impairment test. Intangible assets with finite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on the balance sheet. Other intangible assets consist of core deposit intangible assets arising from whole bank and branch acquisitions and are amortized on an accelerated method over their estimated useful lives, which range from 6 to 10 years.
Bargain Purchase Gain [Policy Text Block]	Bargain Purchase Gain A bargain purchase arises when the fair value of the net assets acquired in a business combination exceeds the consideration transferred, resulting in a gain being recorded by the acquirer. The Company recognized the gain as income on the date of acquisition in noninterest income.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, the Company has defined cash equivalents as those amounts included in the balance sheet captions “Cash and due from banks” and “Interest-bearing deposits in banks.”
Investment, Policy [Policy Text Block]	Securities Investments in debt securities with readily determinable fair values are classified as either held to maturity (HTM), available for sale (AFS), or trading based on management’s intent. Currently, all of the Company’s debt securities are classified as either AFS or HTM. Equity investments in the FHLB, the Federal Reserve Bank of Richmond, and Community Bankers Bank are separately classified as restricted securities and are carried at cost. AFS securities are carried at estimated fair value with the corresponding unrealized gains and losses excluded from earnings and reported in other comprehensive income (loss), and HTM securities are carried at amortized cost. When an individual AFS security is sold, the Company releases the income tax effects associated with the AFS security from accumulated other comprehensive income (loss). Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains or losses on the sale of securities are recorded on the trade date using the amortized cost of the specific security sold. Transfers of debt securities into the held to maturity classification from the available for sale classification are made at fair value on the date of transfer. The unrealized holding gain or loss on the date of the transfer is reported in accumulated other comprehensive loss and in the carrying value of the held to maturity securities. Such amounts are amortized over the remaining contractual lives of the securities. The net impact to income from the amortization and accretion of the unrealized loss at date of transfer is zero. Equity securities with readily determinable fair values are carried at fair value, with changes in fair value reported in net income. Any equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments. Restricted equity securities are carried at cost and are periodically evaluated for impairment based on the ultimate recovery of par value. The entirety of any impairment on equity securities is recognized in earnings. The Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security is evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company’s AFS portfolio are security type and credit rating, which are influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, structure, credit enhancement, and other factors. If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL is recorded for the credit loss, limited by the amount that the fair value is less than The Company evaluates the credit risk of its HTM securities on at least a quarterly basis. The Company estimates expected credit losses on HTM debt securities on an individual basis based on the probability of default/loss given default methodology. The primary indicators of credit quality for the Company’s HTM portfolio are security type and credit rating, which is influenced by a number of factors including obligor cash flow, geography, seniority, and others. The majority of the Company’s HTM securities with credit risk are obligations of states and political subdivisions.
Financing Receivable, Held-for-Sale [Policy Text Block]	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. The Company, through its banking subsidiary, requires a firm purchase commitment from a permanent investor before loans held for sale can be closed, thus limiting interest rate risk. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. The Bank enters into commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding (rate lock commitments). Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. The period of time between issuance of a loan commitment and closing and sale of the loan generally ranges from 30 to 60 days. The Bank protects itself from changes in interest rates through the use of best efforts forward delivery commitments, whereby the Bank commits to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed interest rate risk on the loan. As a result, the Bank is not exposed to losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity. The market value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best efforts contracts are not actively traded in stand-alone markets. The Bank determines the fair value of rate lock commitments and best efforts contracts by measuring the change in the value of the underlying asset while taking into consideration the probability that the rate lock commitments will close. Because of the high correlation between rate lock commitments and best efforts contracts, no gain or loss occurs on the rate lock commitments.
Financing Receivable [Policy Text Block]	Loans The Company, through its banking subsidiary, grants mortgage, commercial, and consumer loans to customers. The Bank segments its loan portfolio into real estate loans, commercial and industrial loans, and consumer and other loans. Real estate loans are further divided into the following classes: Construction and Land Development; 1-4 Family Residential; and Other Real Estate Loans. Descriptions of the Company’s loan classes are as follows: Real Estate Loans – Construction and Land Development: The Company originates construction loans for the acquisition and development of land and construction of commercial buildings, condominiums, townhomes, and one-to-four family residences. Real Estate Loans – 1-4 Family: This class of loans includes loans secured by one-to-four family homes. In addition to traditional residential mortgage loans secured by a first or junior lien on the property, the Bank offers home equity lines of credit. Real Estate Loans – Other: This loan class consists primarily of loans secured by various types of commercial real estate typically in the Bank’s market area, including multi-family residential buildings, office and retail buildings, industrial and warehouse buildings, hotels, and religious facilities. Commercial and Industrial Loans: Commercial loans may be unsecured or secured with non-real estate commercial property. The Company's banking subsidiary makes commercial loans to businesses located within its market area and also to businesses outside of its market area through loan participations with other financial institutions and through the purchase of commercial loans through third party lending programs. Loans originated under the SBA's PPP are also included in this loan class. Consumer and Other Loans: Consumer loans include all loans made to individuals for consumer or personal purposes. They include new and used automobile loans, unsecured loans, and lines of credit. The Company's banking subsidiary makes consumer loans to individuals located within its market area and also to individuals outside of its market through the purchase of loans from another financial institution. A substantial portion of the loan portfolio is represented by residential and commercial loans secured by real estate throughout the Bank's market area. The ability of the Bank’s debtors to honor their contracts may be impacted by the real estate and general economic conditions in this area. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances less the ACLL and any deferred fees or costs on originated loans. Interest income is accrued and credited to income based on the unpaid principal balance. Loan origination fees, net of certain origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. Interest income includes amortization of purchase premiums and discounts, recognized evenly over the life of the loans. A loan’s past due status is based on the contractual due date of the most delinquent payment due. Loans are generally placed on non-accrual status when the collection of principal or interest is 90 days or more past due, or earlier, if collection is uncertain based on an evaluation of the net realizable value of the collateral and the financial strength of the borrower. Loans greater than 90 days past due may remain on accrual status if management determines it has adequate collateral to cover the principal and interest. For those loans that are carried on non-accrual status, payments are first applied to principal outstanding. A loan may be returned to accrual status if the borrower has demonstrated a sustained period of repayment performance in accordance with the contractual terms of the loan and there is reasonable assurance the borrower will continue to make payments as agreed. These policies are applied consistently across the loan portfolio. All interest accrued but not collected for loans that are placed on non-accrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. When a loan is returned to accrual status, interest income is recognized based on the new effective yield to maturity of the loan. Any unsecured loan that is deemed uncollectible is charged-off in full. Any secured loan that is considered by management to be uncollectible is partially charged-off and carried at the fair value of the collateral less estimated selling costs. This charge-off policy applies to all loan segments. Loans Acquired through Third Party Lending Programs The loan portfolio includes commercial and industrial loans that were originated by a third-party and were acquired at premiums. Premiums on performing loans are amortized into interest income and fees on loans over the life of the loans using the effective interest method. Premiums on non-performing loans are not amortized into interest income and fees on loans after loans are placed on non-accrual status and are included in the calculation of specific reserve component of the allowance for credit losses on loans for individually analyzed loans.
Credit Loss, Financial Instrument [Policy Text Block]	Allowance for Credit Losses - Held-to-Maturity Securities The Company estimates expected credit losses on held-to-maturity securities on an individual basis based on a Probability of Default/Loss Given Default (“PD/LGD”) methodology primarily using security-level credit ratings. The primary indicators of credit quality for the Company’s held-to-maturity portfolio are security type and credit ratings, which are influenced by a number of factors including obligor cash flow, geography, seniority, among other factors. The Company’s held-to-maturity securities with credit risk are municipal bonds and corporate debt securities. All other held-to-maturity securities are covered by the explicit or implied guarantee of the United States government or one if its agencies. Changes in the allowance for credit loss are recorded as provision for (or recovery of) credit losses in the Consolidated Statements of Income. During the year ended December 31, 2024, the Company recorded a recovery of credit losses on held-to-maturity securities of $12 thousand. The allowance for credit losses on held-to-maturity securities was $95 thousand and $107 thousand at December 31, 2024 and 2023, respectively. Allowance for Credit Losses – Available-for-Sale Securities Management evaluates all available-for-sale securities in an unrealized loss position on a quarterly basis, and more frequently when economic or market conditions warrant such evaluation. If the Company has the intent to sell the security or it is more likely than not that the Company will be required to sell the security, the security is written down to fair value and the entire loss is recorded in earnings. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making the assessment, the Company may consider various factors including the extent to which fair value is less than amortized cost, downgrades in the ratings of the security by a rating agency, the failure of the issuer to make scheduled interest or principal payments and adverse conditions specific to the security. If the assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any deficiency is recorded as an allowance for credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any amount of unrealized loss that has not been recorded through an allowance for credit loss is recognized in other comprehensive income (loss). Changes in the allowance for credit loss are recorded as a provision for (or recovery of) credit losses in the Consolidated Statements of Income. Losses are charged against the allowance for credit loss when management believes an available-for-sale security is confirmed to be uncollectible or when either of the criteria regarding intent or requirement to sell is met. There was no allowance for credit loss related to the available-for-sale portfolio at December 31, 2024 and 2023. Accrued interest receivable on available-for-sale securities totaled $836 thousand and $769 thousand at December 31, 2024 and 2023, respectively and was excluded from the estimate of credit losses. Allowance for Credit Losses - Loans The allowance for loan credit losses represents an amount which, in management’s judgement, is adequate to absorb the lifetime expected losses that may be sustained on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions, and prepayment experience. The allowance for loan credit losses is measured and recorded upon the initial recognition of a financial asset. The allowance for loan credit losses is reduced by charge-offs, net of recoveries of previous losses, and is increased or decreased by a provision for (or recovery of) credit losses, which is recorded in the Consolidated Statement of Income. The Company is utilizing a discounted cash flow model to estimate its current expected credit losses. For the purposes of calculating its quantitative reserves, the Company has segmented its loan portfolio based on loans which share similar risk characteristics. Within the quantitative portion of the calculation, the Company utilizes at least one or a combination of loss drivers, which may include unemployment rates, home price indices, and/or gross domestic product (“GDP”), to adjust its loss rates over a reasonable and supportable forecast period of one year. A straight-line reversion technique is used for the following eight quarters, at which time the Company reverts to historical averages. To further adjust the allowance for credit losses for expected losses not already included within the quantitative component of the calculation, the Company may consider qualitative factors, including but not limited to: variability in the economic forecast, changes in volume and severity of adversely classified loans, changes in concentrations of credit, changes in the nature and volume of the loan segments, factors related to credit administration, and other idiosyncratic risks not embedded in the data used in the model. Loans that do not share risk characteristics are evaluated on an individual basis. The Company designates individually evaluated loans on nonaccrual status as collateral dependent loans, as well as other loans that management of the Company designates as having higher risk and loans for which the repayment is expected to be provided substantially through the operation or sale of the collateral. These loans do not share common risk characteristics and are not included within the collectively evaluated loans for determining the allowance for credit losses. Under CECL, for collateral dependent loans, the Company has adopted the practical expedient to measure the allowance for credit losses based on the fair value of collateral. The allowance for credit losses is calculated on an individual loan basis based on the shortfall between the fair value of the loan’s collateral, which is adjusted for liquidation costs/discounts, and amortized cost. If the fair value of the collateral exceeds the amortized cost, no allowance is required. The adoption of CECL did not result in a significant change to any other credit risk management and monitoring processes, including identification of past due or delinquent borrowers, nonaccrual practices or charge-off policy. Allowance for Credit Losses – Unfunded Commitments Financial Instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit issued to meet customer financing needs. The Company’s exposure to credit losses in the event of nonperformance by the other party to the financial instrument for off-balance sheet loan commitments is represented by the contractual amount of those instruments. Such financial instruments are recorded when they are funded. The Company records all allowance for credit losses on off-balance sheet credit exposures, unless the commitments to extend credit are unconditionally cancelable, through a charge to provision for (or recovery of) credit losses in the Consolidated Statement of Income. The allowances for credit losses on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date under the current expected credit losses model using the same methodology as the loan portfolio, taking into consideration the likelihood that funding will occur as well as any third-party guarantees. The allowance for unfunded commitments is included in other liabilities on the Company’s consolidated balance sheet.
Financing Receivable, Fee and Interest Income [Policy Text Block]	Accrued Interest Receivable The Company has elected to exclude the accrued interest from the amortized cost basis in its determination of the allowance for credit losses for both loans and held-to-maturity securities, as well as elected the policy to write-off accrued interest receivable directly through the reversal of interest income. Accrued interest receivable totaled $4.8 million and $3.3 million on loans and $423 thousand and $570 thousand on held-to-maturity securities at December 31, 2024 and 2023, respectively, and is included in “Accrued Interest Receivable” on the Company’s Consolidated Balance Sheets.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Premises and equipment are depreciated over their estimated useful lives ranging from three years to forty years; leasehold improvements are amortized over the lives of the respective leases or the estimated useful life of the leasehold improvement, whichever is less. Software is amortized over its estimated useful life ranging from three to seven years. Depreciation and amortization are recorded on the straight-line method. Costs of maintenance and repairs are charged to expense as incurred. Costs of replacing structural parts of major units are considered individually and are expensed or capitalized as the facts dictate. Gains and losses on routine dispositions are reflected in current operations.
Lessee, Leases [Policy Text Block]	Leases Lease liabilities represent the Company's obligation to make lease payments and are presented at each reporting date as the net present value of the remaining contractual cash flows. Cash flows are discounted at the Company's incremental borrowing rate in effect at the commencement date of the lease. Right-of-use assets represent the Company's right to use the underlying asset for the lease term and are calculated as the sum of the lease liability and, if applicable, prepaid rent, initial direct costs, and any incentives received from the lessor. Lease payments for short-term leases are recognized as lease expense on a straight-line basis over the lease term, or for variable lease payments, in the period in which the obligation was incurred. Payments for leases with terms longer than twelve months are included in the determination of the lease liability. Payments may be fixed for the term of the lease or variable. If the lease agreement provides a known escalator, such as a specified percentage increase per year or a stated increase at a specified time, the variable payment is included in the cash flows used to determine the lease liability. If the variable payment is based upon an unknown escalator, such as the consumer price index at a future date, the increase is not included in the cash flows used to determine the lease liability. Three of the Company's leases provide known escalators that are included in the determination of the lease liability. The remaining leases do not have variable payments during the term of the lease.
Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block]	Other Real Estate Owned Other real estate owned (OREO) consists of properties obtained through a foreclosure proceeding or through an in-substance foreclosure in satisfaction of loans and properties originally acquired for branch operations or expansion but no longer intended to be used for that purpose. OREO is initially recorded at fair value less estimated costs to sell to establish a new cost basis. OREO is subsequently reported at the lower of cost or fair value less costs to sell, determined on the basis of current appraisals, comparable sales, and other estimates of fair value obtained principally from independent sources, adjusted for estimated selling costs. Management also considers other factors or recent developments, such as changes in absorption rates or market conditions from the time of valuation and anticipated sales values considering management’s plans for disposition, which could result in adjustments to the collateral value estimates indicated in the appraisals. Significant judgments and complex estimates are required in estimating the fair value of other real estate owned, and the period of time within which such estimates can be considered current is significantly shortened during periods of market volatility. In response to market conditions and other economic factors, management may utilize liquidation sales as part of its distressed asset disposition strategy. As a result of the significant judgments required in estimating fair value and the variables involved in different methods of disposition, the net proceeds realized from sales transactions could differ significantly from appraisals, comparable sales, and other estimates used to determine the fair value of other real estate owned. Management reviews the value of other real estate owned each quarter, if any, and adjusts the values as appropriate. Revenue and expenses from operations and changes in the valuation allowance are included in other real estate owned expense.
Bank Owned Life Insurance [Policy Text Block]	Bank-Owned Life Insurance The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the consolidated balance sheets, and any increase in cash surrender value is recorded as income from bank owned life insurance on the consolidated statements of income. In the event of the death of an insured individual under these policies, the Company receives a death benefit which is also recorded as income from bank owned life insurance. The Company is exposed to credit risk to the extent an insurance company is unable to fulfill its financial obligations under a policy.
Derivatives, Policy [Policy Text Block]	Derivative Financial Instruments The Company recognizes derivative financial instruments at fair value as either an other asset or other liability in its Consolidated Balance Sheets. The Company’s derivative financial instruments are comprised of interest rate swaps that qualify and are designated as cash flow hedges on the Company’s junior subordinated debt. Gains or losses on the Company’s cash flow hedges are reported as a component of other comprehensive income, net of deferred income taxes, and reclassified into earnings in the same period(s) during which the hedged transactions affect earnings. The Company’s derivative financial instruments are described more fully in Note 25.
Share-Based Payment Arrangement [Policy Text Block]	Stock Based Compensation Compensation cost is recognized for restricted stock units and other stock awards issued to employees and directors based on the fair value of the awards at the date of grant. The market price of the Company’s common stock at the date of grant is used to estimate the fair value of restricted stock units and other stock awards.
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]	Retirement Plans Employee 401(k) and profit sharing plan expense is the amount of matching contributions and Bank discretionary matches.
Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]	Transfers of Financial Assets Transfers of financial assets, including loan participations, are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when ( 1) the assets have been isolated from the Company, ( 2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and ( 3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before maturity.
Income Tax, Policy [Policy Text Block]	Income Taxes Deferred income tax assets and liabilities are determined using the asset and liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. Deferred taxes are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not that the position will be sustained upon examination, including the resolution of appeals or litigation processes, if any. Tax positions taken are not offset or aggregated with other positions. Tax positions that meet the more-likely-than- not recognition threshold are measured as the largest amount of tax benefit that is more than 50 percent likely of being realized upon settlement with the applicable taxing authority. The portion of the benefits associated with tax positions taken that exceeds the amount measured as described above is reflected as a liability for unrecognized tax benefits in the accompanying consolidated balance sheet along with any associated interest and penalties that would be payable to the taxing authorities upon examination. There was no liability for unrecognized tax benefits recorded as of December 31, 2024 and 2023. Interest and penalties associated with unrecognized tax benefits, if any, are classified as additional income taxes in the consolidated statements of income.
Segment Reporting, Policy [Policy Text Block]	Segments Operating segments as defined by ASC 280, Segment Reporting, are components of an enterprise for which separate financial information is available that is evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance. The Company operates through two reportable operating segments: banking and wealth management. The accounting policies of operating segments are the same as those described elsewhere in this footnote. See Note 26 for further discussion of the Company's operating segments.
Management and Investment Advisory Fees, Policy [Policy Text Block]	Wealth Management Department Securities and other property held by the wealth management department in a fiduciary or agency capacity are not assets of the Company and are not included in the accompanying consolidated financial statements.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Common Share Basic earnings per common share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to restricted stock units and are determined using the treasury method. See Note 15 for further information regarding earnings per common share.
Advertising Cost [Policy Text Block]	Advertising Costs The Company follows the policy of charging the production costs of advertising to expense as incurred. Total advertising expense incurred for 2024 and 2023 was $639 thousand and $573 thousand, respectively.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains, and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities and changes in fair values of cash flow hedges, are reported as a separate component of the equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income (loss).
Commitments and Contingencies, Policy [Policy Text Block]	Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are such matters that will have a material effect on the consolidated financial statements.
New Accounting Pronouncements, Policy [Policy Text Block]	Adoption of New Accounting Pronouncements Adoption of New Accounting Standards – In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The amendments in this ASU are intended to improve reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. This ASU requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker (CODM), an amount for other segment items by reportable segment and a description of its composition, all annual disclosures about a reportable segment profit or loss and assets currently required by FASB ASU Topic 280 in interim periods, and the title and position of the CODM and how the CODM uses the reported measures. Additionally, this ASU requires that at least one of the reported segment profit and loss measures should be the measure that is most consistent with the measurement principles used in an entity’s consolidated financial statements. Lastly, this ASU requires public business entities with a single reportable segment to provide all disclosures required by these amendments in this ASU and all existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied retrospectively. ASU 2023-07 did not have a material impact on the Company’s financial condition or results of operations but did result in additional disclosures. For further information, refer to Note 26 “Segment Reporting” in this Form 10-K. Recent Accounting Pronouncements In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” ASU 2024-03 requires public companies to disclose, in the notes to the financial statements, specific information about certain costs and expenses at each interim and annual reporting period. This includes disclosing amounts related to employee compensation, depreciation, and intangible asset amortization. In addition, public companies will need to provide qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. The FASB subsequently issued ASU 2025-01, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date”, which amends the effective date of ASU 2024-03 to clarify that all public business entities are required to adopt the guidance in ASU 2024-03 in annual reporting periods beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027. Early adoption of ASU 2024-03 is permitted. Implementation of ASU 2024-03 may be applied prospectively or retrospectively. The Company does not expect the adoption of ASU 2024-03 to have a material impact on its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The amendments in this ASU require an entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold, which is greater than five percent of the amount computed by multiplying pretax income by the entity’s applicable statutory rate, on an annual basis. Additionally, the amendments in this ASU require an entity to disclose the amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign taxes and the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions that are equal to or greater than five percent of total income taxes paid (net of refunds received). Lastly, the amendments in this ASU require an entity to disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign and income tax expense (or benefit) from continuing operations disaggregated by federal, state, and foreign. This ASU is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied on a prospective basis; however, retrospective application is permitted. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its consolidated financial statements.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2024

Basis of Accounting, Policy [Policy Text Block]

First National Corporation (the Company) is the bank holding company of First Bank (the Bank). The Company also owns First National (VA) Statutory Trust II (Trust II), and First National (VA) Statutory Trust III (Trust III and, together with Trust II, the Trusts). The Trusts were formed for the purpose of issuing redeemable capital securities, commonly known as trust preferred securities and are not included in the Company’s consolidated financial statements in accordance with authoritative accounting guidance because management has determined that the Trusts qualify as variable interest entities. The Bank owns First Bank Financial Services, Inc., which invests in entities that provide title insurance and investment services. The Bank owns Shen-Valley Land Holdings, LLC and ESF, LLC which were formed to hold other real estate owned and future office sites. The Bank offers loan, deposit, and wealth management products and services in the Shenandoah Valley, south-central regions of Virginia, the Roanoke Valley, the Richmond MSA, and in northern North Carolina. Loan products and services include consumer loans, residential mortgages, home equity loans, and commercial loans. Deposit products and services include checking accounts, treasury management solutions, savings accounts, money market accounts, certificates of deposit, and individual retirement accounts. Wealth management services include estate planning, investment management of assets, trustee under an agreement, trustee under a will, individual retirement accounts, and estate settlement. The Bank offers other services, including internet banking, mobile banking, remote deposit capture, and other traditional banking services.

On October 1, 2024, the Company completed the acquisition of Touchstone Bankshares, Inc. (Touchstone). Touchstone’s results of operations are included in the Company’s consolidated results since the date of acquisition.

The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America and to accepted practices within the banking industry.

Consolidation, Policy [Policy Text Block]

Principles of Consolidation

The consolidated financial statements of First National Corporation include the accounts of all six companies. All material intercompany balances and transactions have been eliminated in consolidation, except for balances and transactions related to the Trusts. The subordinated debt of these Trusts is reflected as a liability of the Company.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that require the most subjective or complex judgments relate to the allowance for credit losses, loans acquired in a business combination, and goodwill.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Significant Group Concentrations of Credit Risk

Most of the Company’s activities are with customers located within the Shenandoah Valley, south-central regions of Virginia, the Roanoke Valley, the Richmond MSA, and in northern North Carolina. The types of lending that the Company engages in are included in Note 4. The Company has a concentration of credit risk in commercial real estate but does not have a significant concentration to any one customer or industry.

Business Combinations Policy [Policy Text Block]

Acquisition Accounting

The Company accounts for mergers and acquisitions that qualify as a business combination under ASC 805, Business Combinations, which requires the use of the acquisition method of accounting. Under the acquisition method, we record all identifiable assets acquired, including intangible assets and the liabilities assumed at their fair values as of the acquisition date. If the purchase price exceeds that of the net assets acquired, an unidentified intangible asset (goodwill) is recorded. If the purchase price is determined to be less than that of the net assets acquired at fair value, a bargain purchase gain is recorded in results of operations. Determining fair values of net assets acquired often involves estimates based on third-party valuations, such as appraisals or internal valuations based on discounted cash flow analysis or other valuation techniques. These methodologies are inherently subjective and involve significant assumptions, adjustments, and judgement around the selection of assumptions including, among others, discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The determination of the useful lives over which an intangible asset will be amortized is also subjective. While the selected fair values represent our best estimate of fair value as of the acquisition date, these estimates are inherently uncertain. In addition, the acquisition method of accounting allows for a measurement period to adjust acquisition accounting for up to one year after the acquisition date, for new information that existed at the acquisition date but may not have been known or available at that time. For further information, refer to Note 2 “Acquisitions” in Part I, Item 1 of this Annual Report.

Acquired loans are recorded at their fair value at acquisition date without carryover of the acquiree’s previously established ACLL, as credit discounts are included in the determination of fair value. The fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected on the loans and then applying a market-based discount rate to those cash flows. During evaluation upon acquisition, acquired loans are also classified as either PCD or Non-PCD. Acquired loans are subject to the Company’s ACLL policy upon acquisition.

For Non-PCD loans, the difference between the fair value and unpaid principal balance of the loan at acquisition date (premium or discount) is amortized or accreted into interest income over the life of the loans in accordance with ASC 310-20, Receivables – Nonrefundable Fees and Other Costs. If the acquired performing loan has revolving privileges, it is accounted for using the straight-line method; otherwise, the effective interest method is used.

PCD loans are loans that have experienced more-than-insignificant credit deterioration since origination. PCD loans are recorded at the purchase price plus the initial allowance for credit losses. An ACLL is determined using the same methodology as other loans held for investment (LHFI). The sum of the loan’s purchase price and ACLL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan under ASC 310-20, Receivables – Nonrefundable Fees and Other Costs. If the loan has revolving privileges, the discount/premium is amortized/accreted using the straight-line method; otherwise, the effective interest method is used. Subsequent changes to the ACLL are recorded through provision expense.

Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]

Goodwill and Other Intangible Assets

Goodwill arises from business combinations and is determined as the excess fair value of the consideration transferred over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate that a goodwill impairment test should be performed. The Company has selected June 30 as the date to perform the annual impairment test. Intangible assets with finite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on the balance sheet.

Other intangible assets consist of core deposit intangible assets arising from whole bank and branch acquisitions and are amortized on an accelerated method over their estimated useful lives, which range from 6 to 10 years.

Bargain Purchase Gain [Policy Text Block]

Bargain Purchase Gain

A bargain purchase arises when the fair value of the net assets acquired in a business combination exceeds the consideration transferred, resulting in a gain being recorded by the acquirer. The Company recognized the gain as income on the date of acquisition in noninterest income.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

For purposes of the consolidated statements of cash flows, the Company has defined cash equivalents as those amounts included in the balance sheet captions “Cash and due from banks” and “Interest-bearing deposits in banks.”

Investment, Policy [Policy Text Block]

Securities

Investments in debt securities with readily determinable fair values are classified as either held to maturity (HTM), available for sale (AFS), or trading based on management’s intent. Currently, all of the Company’s debt securities are classified as either AFS or HTM. Equity investments in the FHLB, the Federal Reserve Bank of Richmond, and Community Bankers Bank are separately classified as restricted securities and are carried at cost. AFS securities are carried at estimated fair value with the corresponding unrealized gains and losses excluded from earnings and reported in other comprehensive income (loss), and HTM securities are carried at amortized cost. When an individual AFS security is sold, the Company releases the income tax effects associated with the AFS security from accumulated other comprehensive income (loss). Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains or losses on the sale of securities are recorded on the trade date using the amortized cost of the specific security sold.

Transfers of debt securities into the held to maturity classification from the available for sale classification are made at fair value on the date of transfer. The unrealized holding gain or loss on the date of the transfer is reported in accumulated other comprehensive loss and in the carrying value of the held to maturity securities. Such amounts are amortized over the remaining contractual lives of the securities. The net impact to income from the amortization and accretion of the unrealized loss at date of transfer is zero. Equity securities with readily determinable fair values are carried at fair value, with changes in fair value reported in net income. Any equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments. Restricted equity securities are carried at cost and are periodically evaluated for impairment based on the ultimate recovery of par value. The entirety of any impairment on equity securities is recognized in earnings.

The Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security is evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company’s AFS portfolio are security type and credit rating, which are influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, structure, credit enhancement, and other factors.

If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL is recorded for the credit loss, limited by the amount that the fair value is less than

The Company evaluates the credit risk of its HTM securities on at least a quarterly basis. The Company estimates expected credit losses on HTM debt securities on an individual basis based on the probability of default/loss given default methodology. The primary indicators of credit quality for the Company’s HTM portfolio are security type and credit rating, which is influenced by a number of factors including obligor cash flow, geography, seniority, and others. The majority of the Company’s HTM securities with credit risk are obligations of states and political subdivisions.

Financing Receivable, Held-for-Sale [Policy Text Block]

Loans Held for Sale

Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. The Company, through its banking subsidiary, requires a firm purchase commitment from a permanent investor before loans held for sale can be closed, thus limiting interest rate risk. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income.

The Bank enters into commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding (rate lock commitments). Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. The period of time between issuance of a loan commitment and closing and sale of the loan generally ranges from 30 to 60 days. The Bank protects itself from changes in interest rates through the use of best efforts forward delivery commitments, whereby the Bank commits to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed interest rate risk on the loan. As a result, the Bank is not exposed to losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity.

The market value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best efforts contracts are not actively traded in stand-alone markets. The Bank determines the fair value of rate lock commitments and best efforts contracts by measuring the change in the value of the underlying asset while taking into consideration the probability that the rate lock commitments will close. Because of the high correlation between rate lock commitments and best efforts contracts, no gain or loss occurs on the rate lock commitments.

Financing Receivable [Policy Text Block]

Loans

The Company, through its banking subsidiary, grants mortgage, commercial, and consumer loans to customers. The Bank segments its loan portfolio into real estate loans, commercial and industrial loans, and consumer and other loans. Real estate loans are further divided into the following classes: Construction and Land Development; 1-4 Family Residential; and Other Real Estate Loans. Descriptions of the Company’s loan classes are as follows:

Real Estate Loans – Construction and Land Development: The Company originates construction loans for the acquisition and development of land and construction of commercial buildings, condominiums, townhomes, and one-to-four family residences.

Real Estate Loans – 1-4 Family: This class of loans includes loans secured by one-to-four family homes. In addition to traditional residential mortgage loans secured by a first or junior lien on the property, the Bank offers home equity lines of credit.

Real Estate Loans – Other: This loan class consists primarily of loans secured by various types of commercial real estate typically in the Bank’s market area, including multi-family residential buildings, office and retail buildings, industrial and warehouse buildings, hotels, and religious facilities.

Commercial and Industrial Loans: Commercial loans may be unsecured or secured with non-real estate commercial property. The Company's banking subsidiary makes commercial loans to businesses located within its market area and also to businesses outside of its market area through loan participations with other financial institutions and through the purchase of commercial loans through third party lending programs. Loans originated under the SBA's PPP are also included in this loan class.

Consumer and Other Loans: Consumer loans include all loans made to individuals for consumer or personal purposes. They include new and used automobile loans, unsecured loans, and lines of credit. The Company's banking subsidiary makes consumer loans to individuals located within its market area and also to individuals outside of its market through the purchase of loans from another financial institution.

A substantial portion of the loan portfolio is represented by residential and commercial loans secured by real estate throughout the Bank's market area. The ability of the Bank’s debtors to honor their contracts may be impacted by the real estate and general economic conditions in this area.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances less the ACLL and any deferred fees or costs on originated loans. Interest income is accrued and credited to income based on the unpaid principal balance. Loan origination fees, net of certain origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. Interest income includes amortization of purchase premiums and discounts, recognized evenly over the life of the loans.

A loan’s past due status is based on the contractual due date of the most delinquent payment due. Loans are generally placed on non-accrual status when the collection of principal or interest is 90 days or more past due, or earlier, if collection is uncertain based on an evaluation of the net realizable value of the collateral and the financial strength of the borrower. Loans greater than 90 days past due may remain on accrual status if management determines it has adequate collateral to cover the principal and interest. For those loans that are carried on non-accrual status, payments are first applied to principal outstanding. A loan may be returned to accrual status if the borrower has demonstrated a sustained period of repayment performance in accordance with the contractual terms of the loan and there is reasonable assurance the borrower will continue to make payments as agreed. These policies are applied consistently across the loan portfolio.

All interest accrued but not collected for loans that are placed on non-accrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. When a loan is returned to accrual status, interest income is recognized based on the new effective yield to maturity of the loan.

Any unsecured loan that is deemed uncollectible is charged-off in full. Any secured loan that is considered by management to be uncollectible is partially charged-off and carried at the fair value of the collateral less estimated selling costs. This charge-off policy applies to all loan segments.

Loans Acquired through Third Party Lending Programs

The loan portfolio includes commercial and industrial loans that were originated by a third-party and were acquired at premiums. Premiums on performing loans are amortized into interest income and fees on loans over the life of the loans using the effective interest method. Premiums on non-performing loans are not amortized into interest income and fees on loans after loans are placed on non-accrual status and are included in the calculation of specific reserve component of the allowance for credit losses on loans for individually analyzed loans.

Credit Loss, Financial Instrument [Policy Text Block]

Allowance for Credit Losses - Held-to-Maturity Securities

The Company estimates expected credit losses on held-to-maturity securities on an individual basis based on a Probability of Default/Loss Given Default (“PD/LGD”) methodology primarily using security-level credit ratings. The primary indicators of credit quality for the Company’s held-to-maturity portfolio are security type and credit ratings, which are influenced by a number of factors including obligor cash flow, geography, seniority, among other factors. The Company’s held-to-maturity securities with credit risk are municipal bonds and corporate debt securities. All other held-to-maturity securities are covered by the explicit or implied guarantee of the United States government or one if its agencies.

Changes in the allowance for credit loss are recorded as provision for (or recovery of) credit losses in the Consolidated Statements of Income. During the year ended December 31, 2024, the Company recorded a recovery of credit losses on held-to-maturity securities of $12 thousand. The allowance for credit losses on held-to-maturity securities was $95 thousand and $107 thousand at December 31, 2024 and 2023, respectively.

Allowance for Credit Losses – Available-for-Sale Securities

Management evaluates all available-for-sale securities in an unrealized loss position on a quarterly basis, and more frequently when economic or market conditions warrant such evaluation. If the Company has the intent to sell the security or it is more likely than not that the Company will be required to sell the security, the security is written down to fair value and the entire loss is recorded in earnings.

If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making the assessment, the Company may consider various factors including the extent to which fair value is less than amortized cost, downgrades in the ratings of the security by a rating agency, the failure of the issuer to make scheduled interest or principal payments and adverse conditions specific to the security. If the assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any deficiency is recorded as an allowance for credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any amount of unrealized loss that has not been recorded through an allowance for credit loss is recognized in other comprehensive income (loss).

Changes in the allowance for credit loss are recorded as a provision for (or recovery of) credit losses in the Consolidated Statements of Income. Losses are charged against the allowance for credit loss when management believes an available-for-sale security is confirmed to be uncollectible or when either of the criteria regarding intent or requirement to sell is met. There was no allowance for credit loss related to the available-for-sale portfolio at December 31, 2024 and 2023.

Accrued interest receivable on available-for-sale securities totaled $836 thousand and $769 thousand at December 31, 2024 and 2023, respectively and was excluded from the estimate of credit losses.

Allowance for Credit Losses - Loans

The allowance for loan credit losses represents an amount which, in management’s judgement, is adequate to absorb the lifetime expected losses that may be sustained on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions, and prepayment experience. The allowance for loan credit losses is measured and recorded upon the initial recognition of a financial asset. The allowance for loan credit losses is reduced by charge-offs, net of recoveries of previous losses, and is increased or decreased by a provision for (or recovery of) credit losses, which is recorded in the Consolidated Statement of Income.

The Company is utilizing a discounted cash flow model to estimate its current expected credit losses. For the purposes of calculating its quantitative reserves, the Company has segmented its loan portfolio based on loans which share similar risk characteristics. Within the quantitative portion of the calculation, the Company utilizes at least one or a combination of loss drivers, which may include unemployment rates, home price indices, and/or gross domestic product (“GDP”), to adjust its loss rates over a reasonable and supportable forecast period of one year. A straight-line reversion technique is used for the following eight quarters, at which time the Company reverts to historical averages. To further adjust the allowance for credit losses for expected losses not already included within the quantitative component of the calculation, the Company may consider qualitative factors, including but not limited to: variability in the economic forecast, changes in volume and severity of adversely classified loans, changes in concentrations of credit, changes in the nature and volume of the loan segments, factors related to credit administration, and other idiosyncratic risks not embedded in the data used in the model.

Loans that do not share risk characteristics are evaluated on an individual basis. The Company designates individually evaluated loans on nonaccrual status as collateral dependent loans, as well as other loans that management of the Company designates as having higher risk and loans for which the repayment is expected to be provided substantially through the operation or sale of the collateral. These loans do not share common risk characteristics and are not included within the collectively evaluated loans for determining the allowance for credit losses. Under CECL, for collateral dependent loans, the Company has adopted the practical expedient to measure the allowance for credit losses based on the fair value of collateral. The allowance for credit losses is calculated on an individual loan basis based on the shortfall between the fair value of the loan’s collateral, which is adjusted for liquidation costs/discounts, and amortized cost. If the fair value of the collateral exceeds the amortized cost, no allowance is required.

The adoption of CECL did not result in a significant change to any other credit risk management and monitoring processes, including identification of past due or delinquent borrowers, nonaccrual practices or charge-off policy.

Allowance for Credit Losses – Unfunded Commitments

Financial Instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit issued to meet customer financing needs. The Company’s exposure to credit losses in the event of nonperformance by the other party to the financial instrument for off-balance sheet loan commitments is represented by the contractual amount of those instruments. Such financial instruments are recorded when they are funded.

The Company records all allowance for credit losses on off-balance sheet credit exposures, unless the commitments to extend credit are unconditionally cancelable, through a charge to provision for (or recovery of) credit losses in the Consolidated Statement of Income. The allowances for credit losses on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date under the current expected credit losses model using the same methodology as the loan portfolio, taking into consideration the likelihood that funding will occur as well as any third-party guarantees. The allowance for unfunded commitments is included in other liabilities on the Company’s consolidated balance sheet.

Financing Receivable, Fee and Interest Income [Policy Text Block]

Accrued Interest Receivable

The Company has elected to exclude the accrued interest from the amortized cost basis in its determination of the allowance for credit losses for both loans and held-to-maturity securities, as well as elected the policy to write-off accrued interest receivable directly through the reversal of interest income. Accrued interest receivable totaled $4.8 million and $3.3 million on loans and $423 thousand and $570 thousand on held-to-maturity securities at December 31, 2024 and 2023, respectively, and is included in “Accrued Interest Receivable” on the Company’s Consolidated Balance Sheets.

Property, Plant and Equipment, Policy [Policy Text Block]

Premises and Equipment

Land is carried at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Premises and equipment are depreciated over their estimated useful lives ranging from three years to forty years; leasehold improvements are amortized over the lives of the respective leases or the estimated useful life of the leasehold improvement, whichever is less. Software is amortized over its estimated useful life ranging from three to seven years. Depreciation and amortization are recorded on the straight-line method.

Costs of maintenance and repairs are charged to expense as incurred. Costs of replacing structural parts of major units are considered individually and are expensed or capitalized as the facts dictate. Gains and losses on routine dispositions are reflected in current operations.

Lessee, Leases [Policy Text Block]

Leases

Lease liabilities represent the Company's obligation to make lease payments and are presented at each reporting date as the net present value of the remaining contractual cash flows. Cash flows are discounted at the Company's incremental borrowing rate in effect at the commencement date of the lease. Right-of-use assets represent the Company's right to use the underlying asset for the lease term and are calculated as the sum of the lease liability and, if applicable, prepaid rent, initial direct costs, and any incentives received from the lessor.

Lease payments for short-term leases are recognized as lease expense on a straight-line basis over the lease term, or for variable lease payments, in the period in which the obligation was incurred. Payments for leases with terms longer than twelve months are included in the determination of the lease liability. Payments may be fixed for the term of the lease or variable. If the lease agreement provides a known escalator, such as a specified percentage increase per year or a stated increase at a specified time, the variable payment is included in the cash flows used to determine the lease liability. If the variable payment is based upon an unknown escalator, such as the consumer price index at a future date, the increase is not included in the cash flows used to determine the lease liability. Three of the Company's leases provide known escalators that are included in the determination of the lease liability. The remaining leases do not have variable payments during the term of the lease.

Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block]

Other Real Estate Owned

Other real estate owned (OREO) consists of properties obtained through a foreclosure proceeding or through an in-substance foreclosure in satisfaction of loans and properties originally acquired for branch operations or expansion but no longer intended to be used for that purpose. OREO is initially recorded at fair value less estimated costs to sell to establish a new cost basis. OREO is subsequently reported at the lower of cost or fair value less costs to sell, determined on the basis of current appraisals, comparable sales, and other estimates of fair value obtained principally from independent sources, adjusted for estimated selling costs. Management also considers other factors or recent developments, such as changes in absorption rates or market conditions from the time of valuation and anticipated sales values considering management’s plans for disposition, which could result in adjustments to the collateral value estimates indicated in the appraisals. Significant judgments and complex estimates are required in estimating the fair value of other real estate owned, and the period of time within which such estimates can be considered current is significantly shortened during periods of market volatility. In response to market conditions and other economic factors, management may utilize liquidation sales as part of its distressed asset disposition strategy. As a result of the significant judgments required in estimating fair value and the variables involved in different methods of disposition, the net proceeds realized from sales transactions could differ significantly from appraisals, comparable sales, and other estimates used to determine the fair value of other real estate owned. Management reviews the value of other real estate owned each quarter, if any, and adjusts the values as appropriate. Revenue and expenses from operations and changes in the valuation allowance are included in other real estate owned expense.

Bank Owned Life Insurance [Policy Text Block]

Bank-Owned Life Insurance

The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the consolidated balance sheets, and any increase in cash surrender value is recorded as income from bank owned life insurance on the consolidated statements of income. In the event of the death of an insured individual under these policies, the Company receives a death benefit which is also recorded as income from bank owned life insurance. The Company is exposed to credit risk to the extent an insurance company is unable to fulfill its financial obligations under a policy.

Derivatives, Policy [Policy Text Block]

Derivative Financial Instruments

The Company recognizes derivative financial instruments at fair value as either an other asset or other liability in its Consolidated Balance Sheets. The Company’s derivative financial instruments are comprised of interest rate swaps that qualify and are designated as cash flow hedges on the Company’s junior subordinated debt. Gains or losses on the Company’s cash flow hedges are reported as a component of other comprehensive income, net of deferred income taxes, and reclassified into earnings in the same period(s) during which the hedged transactions affect earnings. The Company’s derivative financial instruments are described more fully in Note 25.

Share-Based Payment Arrangement [Policy Text Block]

Stock Based Compensation

Compensation cost is recognized for restricted stock units and other stock awards issued to employees and directors based on the fair value of the awards at the date of grant. The market price of the Company’s common stock at the date of grant is used to estimate the fair value of restricted stock units and other stock awards.

Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]

Retirement Plans

Employee 401(k) and profit sharing plan expense is the amount of matching contributions and Bank discretionary matches.

Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]

Transfers of Financial Assets

Transfers of financial assets, including loan participations, are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when ( 1) the assets have been isolated from the Company, ( 2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and ( 3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before maturity.

Income Tax, Policy [Policy Text Block]

Income Taxes

Deferred income tax assets and liabilities are determined using the asset and liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. Deferred taxes are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.

When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not that the position will be sustained upon examination, including the resolution of appeals or litigation processes, if any. Tax positions taken are not offset or aggregated with other positions. Tax positions that meet the more-likely-than- not recognition threshold are measured as the largest amount of tax benefit that is more than 50 percent likely of being realized upon settlement with the applicable taxing authority. The portion of the benefits associated with tax positions taken that exceeds the amount measured as described above is reflected as a liability for unrecognized tax benefits in the accompanying consolidated balance sheet along with any associated interest and penalties that would be payable to the taxing authorities upon examination. There was no liability for unrecognized tax benefits recorded as of December 31, 2024 and 2023. Interest and penalties associated with unrecognized tax benefits, if any, are classified as additional income taxes in the consolidated statements of income.

Segment Reporting, Policy [Policy Text Block]

Segments

Operating segments as defined by ASC 280, Segment Reporting, are components of an enterprise for which separate financial information is available that is evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance. The Company operates through two reportable operating segments: banking and wealth management. The accounting policies of operating segments are the same as those described elsewhere in this footnote. See Note 26 for further discussion of the Company's operating segments.

Management and Investment Advisory Fees, Policy [Policy Text Block]

Wealth Management Department

Securities and other property held by the wealth management department in a fiduciary or agency capacity are not assets of the Company and are not included in the accompanying consolidated financial statements.

Earnings Per Share, Policy [Policy Text Block]

Earnings Per Common Share

Basic earnings per common share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to restricted stock units and are determined using the treasury method. See Note 15 for further information regarding earnings per common share.

Advertising Cost [Policy Text Block]

Advertising Costs

The Company follows the policy of charging the production costs of advertising to expense as incurred. Total advertising expense incurred for 2024 and 2023 was $639 thousand and $573 thousand, respectively.

Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income (Loss)

Accounting principles generally require that recognized revenue, expenses, gains, and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities and changes in fair values of cash flow hedges, are reported as a separate component of the equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income (loss).

Commitments and Contingencies, Policy [Policy Text Block]

Loss Contingencies

Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are such matters that will have a material effect on the consolidated financial statements.

New Accounting Pronouncements, Policy [Policy Text Block]

Adoption of New Accounting Pronouncements

Adoption of New Accounting Standards – In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The amendments in this ASU are intended to improve reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. This ASU requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker (CODM), an amount for other segment items by reportable segment and a description of its composition, all annual disclosures about a reportable segment profit or loss and assets currently required by FASB ASU Topic 280 in interim periods, and the title and position of the CODM and how the CODM uses the reported measures. Additionally, this ASU requires that at least one of the reported segment profit and loss measures should be the measure that is most consistent with the measurement principles used in an entity’s consolidated financial statements. Lastly, this ASU requires public business entities with a single reportable segment to provide all disclosures required by these amendments in this ASU and all existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied retrospectively. ASU 2023-07 did not have a material impact on the Company’s financial condition or results of operations but did result in additional disclosures. For further information, refer to Note 26 “Segment Reporting” in this Form 10-K.

Recent Accounting Pronouncements

In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” ASU 2024-03 requires public companies to disclose, in the notes to the financial statements, specific information about certain costs and expenses at each interim and annual reporting period. This includes disclosing amounts related to employee compensation, depreciation, and intangible asset amortization. In addition, public companies will need to provide qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. The FASB subsequently issued ASU 2025-01, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date”, which amends the effective date of ASU 2024-03 to clarify that all public business entities are required to adopt the guidance in ASU 2024-03 in annual reporting periods beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027. Early adoption of ASU 2024-03 is permitted. Implementation of ASU 2024-03 may be applied prospectively or retrospectively. The Company does not expect the adoption of ASU 2024-03 to have a material impact on its consolidated financial statements.

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The amendments in this ASU require an entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold, which is greater than five percent of the amount computed by multiplying pretax income by the entity’s applicable statutory rate, on an annual basis. Additionally, the amendments in this ASU require an entity to disclose the amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign taxes and the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions that are equal to or greater than five percent of total income taxes paid (net of refunds received). Lastly, the amendments in this ASU require an entity to disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign and income tax expense (or benefit) from continuing operations disaggregated by federal, state, and foreign. This ASU is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied on a prospective basis; however, retrospective application is permitted. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its consolidated financial statements.