Interest-bearing Deposits [Policy Text Block]

Interest-Bearing Deposits

The Company invests over-night funds in interest-bearing deposits at other banks, including the FHLB, the Federal Reserve and other entities. Interest-bearing deposits are carried at cost.

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 cost or estimated fair value on an individual loan basis. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. The Company releases mortgage servicing rights when loans are sold on the secondary market.

Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]

Allowance for Loan Losses

The allowance for loan losses is an estimate of probable losses inherent in the loan portfolio. The allowance is funded by the provision for loan losses, reduced by charge-offs of loans and increased by recoveries of previously charged-off loans. The determination of the allowance is based on two accounting principles, Accounting Standards Codification (“ASC”) Topic 450-20 (Contingencies) which requires that losses be accrued when occurrence is probable and the amount of the loss is reasonably estimable, and ASC Topic 310-10 (Receivables) which requires accrual of losses on impaired loans if the recorded investment exceeds fair value.

The Company evaluates the allowance each quarter through a methodology that estimates losses on individual impaired loans and evaluates the effect of numerous factors on the credit risk of groups of homogeneous loans ("collectively evaluated loans").

Impaired loans

Impaired loans are larger non-homogeneous loans for which there is a probability that collection of principal or interest will not occur according to the contractual terms of the loan agreement, as well as loans whose terms have been modified in a TDR. The Company performs ongoing analysis of the loan portfolio to determine credit quality on an individual loan basis and to identify impaired loans. Generally, impaired loans have risk ratings that indicate higher risk, such as “classified” or “special mention.” Nonaccrual loan relationships that meet the Company’s balance threshold of $250 are designated impaired. Other loan relationships that meet the Company’s balance threshold of $250 and for which a credit review identified a weakness that indicates principal and interest will not be collected according to the loan terms. All TDRs, regardless of size or past due status are designated impaired.

Impaired loan measurement methods

Impaired loans are individually evaluated to determine appropriate reserves and are measured at the lower of the invested amount or the fair value. Fair value of impaired loans is estimated by either the present value of the loan’s expected future cash flows (“cash flow method”) or the estimated fair value, less selling costs, of the underlying collateral (“collateral method”).

Cash flow method:

The cash flow method is applied to loans that are not collateral dependent and for which cash flows may be estimated. The cash flow method measures fair value using assumptions specific to each loan, including expected amount and timing of cash flows and discount rate. For TDR loans, the discount rate is the rate immediately prior to the modification that resulted in a TDR. If an impaired loan evaluated under the cash flow method becomes 90 days or more past due, it is examined to determine whether the late payment indicates collateral dependency or cash flows below those that were used in the fair value measurement.

Collateral method:

The collateral method is applied to impaired loans that are collateral-dependent, for which foreclosure is imminent or for which non-collateral repayment sources are determined not to be available or reliable. Collateral may be in the form of real estate or business assets including equipment, inventory, and accounts receivable. Fair value is based upon the “as-is” value of independent appraisals or evaluations.

Impaired loans secured by residential 1-4 family properties with outstanding principal balances greater than $250 are valued using an appraisal. Appraisals are also used to value impaired loans secured by commercial real estate with outstanding principal balances greater than $500. Impaired loans secured by residential 1-4 family property with outstanding principal balances of $250 or less, or secured by commercial real estate with outstanding principal balances of $500 or less, are valued using a real estate evaluation prepared by a third party.

Appraisals must conform to the Uniform Standards of Professional Appraisal Practice and are prepared by an independent third-party appraiser who is certified and licensed and who is approved by the Company. Appraisals may incorporate market analysis, comparable sales analysis, cash flow analysis and market data pertinent to the property to determine market value.

Evaluations are prepared by third party providers and reviewed by employees of the Company who are independent of the loan origination, operation, management and collection functions. Evaluations provide a property’s market value based on the property’s current physical condition and characteristics and the economic market conditions that affect the collateral’s market value. Multiple sources of data contribute to the estimate of market value, including physical inspection, independent third-party automated tools, comparable sales analysis and local market information.

Updated appraisals or evaluations are ordered when a loan becomes impaired if the appraisal or evaluation on file is more than 24 months old. Appraisals and evaluations are reviewed for propriety and reasonableness and may be discounted if the Company determines that the value exceeds reasonable levels. If an updated appraisal or evaluation has been ordered but has not been received by a reporting date, the fair value may be based on the most recent available appraisal or evaluation, discounted for age. The appraisal or evaluation value is reduced by selling costs if recovery is expected solely from the sale of collateral.

Results of fair value measurement

The estimated fair value is compared with the loan’s recorded investment (unpaid principal net of any interest payments made during the nonaccrual period and net of any partial charge-offs, accrued interest and deferred fees and costs). Any amount of recorded investment that exceeds estimated fair value on collateral-dependent loans, as well as any other impairment loss considered uncollectible, is charged against the allowance for loan losses. Fair value shortfalls that are not considered uncollectible for loans that are not collateral-dependent are accrued in the allowance as specific reserves. Impaired loans for which collection of interest or principal is in doubt are placed in nonaccrual status. If fair value of an impaired loan is higher than the book value, no specific reserve is recorded, and the loan remains impaired as long as analysis indicates that collection of the loan will not occur according to the contractual terms of the loan agreement.

Nonaccrual status of impaired loans

Nonaccrual status is applied to impaired loans that are not TDRs and for which fair value measurement indicates an impairment loss. Nonaccrual status is applied to TDRs that allow the borrower to discontinue payments of principal or interest for more than 90 days, unless the modification provides reasonable assurance of repayment performance and collateral value supports regular underwriting requirements. TDRs that maintain current status for at least a six-month period, including history prior to restructuring, may accrue interest. Impaired loans with partial charge-offs are maintained as impaired until the remaining balance is satisfied.

Collectively evaluated loans

General allowances are established for collectively evaluated loans. Collectively evaluated loans are grouped into classes based on similar characteristics. Factors considered in determining general allowances include historical loss rates, credit quality indicators, and qualitative factors.

Loss rates

Loss rates are calculated for and applied to individual classes by averaging loss rates over the most recent eight quarters. The loss rate calculation for each class includes losses and recoveries on all loans within the class, including TDRs and other impaired loans. The look-back period of eight quarters is applied consistently among all classes.

Two loss rates for each class are calculated: total net charge-offs for the class as a percentage of average class loan balance (“class loss rate”), and total net charge-offs for the class as a percentage of average classified loans in the class (“classified loss rate”). Net charge-offs in both calculations include charge-offs and recoveries for all loans within the class, including classified and non-classified loans, as well as impaired and TDR loans. Class historical loss rates are applied to collectively evaluated pass-rated loan balances and special mention rated loan balances, and classified historical loss rates are applied to collectively evaluated classified loan balances.

Credit quality indicators

Credit quality indicators, which the Company terms risk grades, are assigned through the Company’s credit review function for larger loans and selective review of loans that fall below credit review thresholds. Credit quality is rated based on the loan’s payment history, the borrower’s current financial situation and value of the underlying collateral.

Loans that do not indicate heightened risk are graded as “pass.” Loans that appear to have elevated credit risk because of frequent or persistent past due status, which is less than 75 days, or that show weakness in the borrower’s financial condition are risk graded “special mention.” Loans with frequent or persistent delinquency exceeding 75 days or that have a higher level of weakness in the borrower’s financial condition are graded “classified.” Classified loans have regulatory risk ratings of “substandard” and “doubtful.”

Qualitative factor allocations

The analysis of certain factors results in standard allocations to all classes. These factors include the risk from changes in lending policies, loan officers’ experience, changes in loan review, and economic factors including local unemployment levels, local bankruptcy rates, interest rate environment, and competition/legal/regulatory environments. Standard allocations for residential vacancy rates and housing inventory are applied to all real-estate secured classes and state and political subdivision loans.

Qualitative factors incorporate economic data targeted to the Company’s market. If market–specific information is not available on a timely basis, regional or national information that historically shows a high degree of correlation to market data may be used. In 2021, the Company applied to all segments and classes an economic factor implemented to address COVID-19 uncertainty: national unemployment filings. Local unemployment filings are closely correlated to national unemployment filings and presented real-time data that was not available with local unemployment data. After a sustained period of pre-pandemic levels of national unemployment filings, the Company removed the factor in 2022.

Factors analyzed for each class, with resultant allocations based upon the level of risk assessed for each class, include levels of past due loans, levels of nonaccrual loans, current class balance as a percentage of total loans, and the percentage of high risk loans within the class. High risk loans include junior liens, interest only and high loan to value loans. High risk loans within each class are analyzed and allocated additional reserves based on current trends.

Allocations for qualitative factors are determined for pass-rated loans. To reflect the increased risk of criticized assets, qualitative factor allocations are multiplied by 150% for special mention loans, and multiplied by 200% for classified loans.

Sales, purchases and reclassification of loans

The Company finances consumer real estate mortgages under “best efforts” contracts with mortgage purchasers. The mortgages are designated as held for sale upon initiation. There have been no major reclassifications from portfolio loans to held for sale. Mortgages held for sale are not included in the calculation of the allowance for loan losses.

Occasionally, the Company purchases or sells participations in loans. All participation loans purchased met the Company’s normal underwriting standards at the time the participation was entered. Participation loans are included in the appropriate portfolio balances to which the allowance methodology is applied.

Unallocated surplus

In addition to funding the allowance for loan losses based upon data analysis, the Company has the option to fund an unallocated surplus in excess to the calculated requirement, based upon management judgement. The Company’s policy permits an unallocated surplus of between 0% and 5% of the calculated requirement.

Estimation of the allowance for loan losses

The estimation of the allowance involves analysis of internal and external variables, methodologies, assumptions and management’s judgment and experience. Key judgments used in determining the allowance for loan losses include internal risk rating determinations, market and collateral values, discount rates, loss rates, and management’s assessment of current economic conditions. These judgments are inherently subjective and actual losses could be greater or less than the estimate. Future estimates of the allowance could increase or decrease based on changes in the financial condition of individual borrowers, concentrations of various types of loans, economic conditions or the markets in which collateral may be sold. The estimate of the allowance accrual determines the amount of provision expense and directly affects our financial results. Please see Note 5 for additional information.

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

Premises and Equipment

Land is carried at cost. Premises and equipment are stated at cost, net of accumulated depreciation. Depreciation is charged to expense over the estimated useful lives of the assets on the straight-line basis. Depreciable lives include 40 years for premises, 3-10 years for furniture and equipment, and 3 years for computer software. Costs of maintenance and repairs are charged to expense as incurred and improvements are capitalized.

Goodwill and Intangible Assets, Policy [Policy Text Block]

Goodwill

The Company records as goodwill the excess of purchase price over the fair value of the identifiable net assets acquired. Goodwill is subject to at least an annual assessment for impairment by applying a fair value based test. The Company contracts with a third party valuation expert to perform annual testing as of September 30 of each fiscal year. The impairment test for 2022 incorporated data as of September 30, 2022.

Accounting guidance provides the option of performing preliminary assessment of qualitative factors to determine whether impairment testing is necessary. The Company opted not to perform the preliminary assessment. The Company’s goodwill impairment analysis considered three valuation techniques appropriate to the measurement. The first technique uses the Company’s market capitalization as an estimate of fair value, the second technique estimates fair value using current market pricing multiples for companies comparable to NBI, while the third technique uses current market pricing multiples for change-of-control transactions involving companies comparable to NBI.

Certain key judgments were used in the valuation measurement. Goodwill is held by the Company’s bank subsidiary. The bank subsidiary is 100% owned by the Company, and no market capitalization is available. Because most of the Company’s assets are comprised of the bank subsidiary’s equity, the Company’s market capitalization was used to estimate the Bank’s market capitalization. Other judgments include the assumption that the companies and transactions used as comparables for the second and third techniques were appropriate to the estimate of the Company’s fair value, and that the comparable multiples are appropriate indicators of fair value, and compliant with accounting guidance. Based upon data at September 30, 2022, each measure indicated that the Company’s fair value exceeded its book value and no impairment was indicated.

Income Tax, Policy [Policy Text Block]

Income Taxes

Income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the asset and liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur.

Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances and information available at the reporting date and is subject to management’s judgment. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized.

The Company recognizes interest and penalties on income taxes as a component of income tax expense.

Earnings Per Share, Policy [Policy Text Block]

Earnings Per Common Share

Basic earnings per common share represents income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. During 2022 and 2021, there were no potential common shares outstanding.

The following shows the weighted average number of shares used in computing earnings per common share for the years indicated.

		2022				2021
Average number of common shares outstanding			5,989,601				6,209,929

Advertising Cost [Policy Text Block]

Advertising

The Company charges advertising costs to expenses as incurred. Advertising expenses were $163 for the year ended December 31, 2022 and $112 for the year ended December 31, 2021.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

In preparing consolidated financial statements in conformity with GAAP, 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 are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, evaluation of impairment of goodwill, and pension obligations.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

ASU 2016-13

In June 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The ASU, as amended, requires an entity to measure expected credit losses for financial assets carried at amortized cost based on historical experience, current conditions, and reasonable and supportable forecasts. Among other things, the ASU also amended the impairment model for available for sale securities and addressed purchased financial assets with deterioration.

On January 1, 2023, the Company adopted ASU No. 2016-13 and related ASUs, in accordance with the required implementation date, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings as of January 1, 2023. Subsequent to adoption, the Company will record adjustments to its allowance(s) for credit losses and reserve for unfunded commitments through the provision for credit losses in the consolidated statements of income. In future filings, results for reporting periods beginning after January 1, 2023 will be presented under Topic 326, while periods prior to January 1, 2023 will be reported in accordance with GAAP applicable at the time period.

Upon adoption, the allowance for credit losses on loans increased from $8,225 to $10,567 and the reserve for unfunded commitments increased from $35 to $242. Based upon the nature and characteristics of our securities portfolios (including issuer specific matters) at the adoption date, macroeconomic conditions and forecasts at that date, and other management judgments, adoption did not result in an allowance for credit losses on available for sale securities. The increase to allowance for credit losses and reserve for unfunded commitments, net of tax, decreased retained earnings by $2,014 as of January 1, 2023.

The Company engaged a third-party model to tabulate its estimate of current expected credit losses, applying a probability of default/loss given default driven discounted cashflow methodology, with default defined as full or partial charge-off, nonaccrual status or past due 90 days or more. In accordance with ASC 326, the Company has segmented its loan portfolio based on similar risk characteristics, using call report code and risk rating.

The Company designated national unemployment as its forecast variable. Multiple forecasts from reputable and independent third parties are sourced to inform the Company’s reasonable and supportable forecasting of current expected credit losses. The forecast is applied over a forecast horizon selected by management at each reporting date, typically of one year and not to exceed two years, after which loss rates revert to long term historical loss experience on a straight line basis.

To further adjust the allowance for credit losses for expected losses not already included within the quantitative component of the calculation, the Company considers the following qualitative adjustment factors: changes in lending policies and procedures, changes in economic conditions, changes in the nature and volume of the loan portfolio, changes in lending management’s experience, changes in the volume and severity of past due loans, changes in the loan review system, changes in concentrations of credit, and the effect of competition, legal and regulatory requirements.

The Company’s CECL implementation process was overseen by a management committee which included the CFO, Controller, Chief Credit Officer and SVP of Credit Administration and reported to the Company’s Enterprise Risk Management Committee. The implementation process included an assessment of data availability and gap analysis, data collection, consideration and analysis of multiple loss estimation methodologies, an assessment of relevant qualitative factors and correlation analysis of multiple potential loss drivers and their impact on the Company’s historical loss experience. During 2022, the Company calculated its current expected credit losses model in parallel to its incurred loss model in order to further refine the methodology and model. In addition, the Company engaged a third-party to perform a comprehensive model validation.

SAB 119

Effective November 25, 2019, the SEC adopted Staff Accounting Bulletin (“SAB”) 119. SAB 119 updated portions of SEC interpretative guidance to align with FASB ASC 326, “Financial Instruments – Credit Losses.” It covers topics including (1) measuring current expected credit losses; (2) development, governance, and documentation of a systematic methodology; (3) documenting the results of a systematic methodology; and (4) validating a systematic methodology.

ASU 2022-03

In June 2022, the FASB issued ASU 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions”. ASU 2022-03 clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The ASU is effective for fiscal years, including interim periods within those fiscal years, beginning after December 15, 2023. Early adoption is permitted. The Company does not expect the adoption of ASU 2022-03 to have a material impact on its consolidated financial statements.

ASU 2022-02

In March 2022, the FASB issued ASU No. 2022-02, “Financial Instruments-Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 addresses areas identified by the FASB as part of its post-implementation review of the credit losses standard (ASU 2016-13) that introduced the CECL model. The amendments eliminate the accounting guidance for TDRs by creditors that have adopted the CECL model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require a public business entity to disclose current-period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. The amendments in this ASU should be applied prospectively, except for the transition method related to the recognition and measurement of TDRs, an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption. For entities that have adopted ASU 2016-13, ASU 2022-02 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. For entities that have not yet adopted ASU 2016-13, the effective dates for ASU 2022-02 are the same as the effective dates in ASU 2016-13. Early adoption is permitted if an entity has adopted ASU 2016-13. An entity may elect to early adopt the amendments about TDRs and related disclosure enhancements separately from the amendments related to vintage disclosures. The Company is currently assessing the impact that ASU 2022-02 will have on its consolidated financial statements.

ASU 2020-04

In March 2020, the FASB issued ASU No. 2020-04 “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” These amendments provide temporary optional guidance to ease the potential burden in accounting for reference rate reform. The ASU provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. It is intended to help stakeholders during the global market-wide reference rate transition period. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022. Subsequently, in January 2021, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2021-01 “Reference Rate Reform (Topic 848): Scope.” This ASU clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. An entity may elect to apply ASU No. 2021-01 on contract modifications that change the interest rate used for margining, discounting, or contract price alignment retrospectively as of any date from the beginning of the interim period that includes March 12, 2020, or prospectively to new modifications from any date within the interim period that includes or is subsequent to January 7, 2021, up to the date that financial statements are available to be issued. An entity may elect to apply ASU No. 2021-01 to eligible hedging relationships existing as of the beginning of the interim period that includes March 12, 2020, and to new eligible hedging relationships entered into after the beginning of the interim period that includes March 12, 2020. The Company has a small number of participation loans that reference LIBOR. The Company is working with the primary banks to determine appropriate actions.