Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Basis of Presentation These interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). However, these interim consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The interim consolidated financial statements are unaudited and reflect all adjustments and reclassifications, which, in the opinion of management, are necessary for a fair presentation of the results of operations and financial condition as of and for the interim periods presented. All adjustments and reclassifications are of a normal and recurring nature. Results for the period ended June 30, 2018 are not necessarily indicative of the results that may be expected for any other interim period or for the year as a whole. The interim consolidated financial statements of Citizens Holding Company (the “Company”) include the accounts of its wholly-owned subsidiary, The Citizens Bank of Philadelphia (the “Bank” and collectively with Citizens Holding Company, the “Corporation”). All significant intercompany transactions have been eliminated in consolidation. For further information and significant accounting policies of the Corporation, see the Notes to Consolidated Financial Statements of Citizens Holding Company included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2017, filed with the Securities and Exchange Commission on March 15, 2018. Nature of Business The Bank operates under a state bank charter and provides general banking services. As a state bank, the Bank is subject to regulations of the Mississippi Department of Banking and Consumer Finance and the Federal Deposit Insurance Company. The Company is also subject to the regulations of the Federal Reserve. The area served by the Bank is east central and southern counties of Mississippi and the surrounding areas. Services are provided at several branch offices. Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses and the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans. In connection with the determination of the allowance for loan losses and valuation of foreclosed real estate, management obtains independent appraisals for significant properties. While management uses available information to recognize losses on loans and to value foreclosed real estate, future additions to the allowance or adjustments to the valuation may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and valuations of foreclosed real estate. Such agencies may require the Company to recognize additions to the allowance or to make adjustments to the valuation based on their judgments about information available to them at the time of their examination. Due to these factors, it is reasonably possible that the allowance for loan losses and valuation of foreclosed real estate may change materially in the near term. Revenue from Contracts with Customers The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous or future periods. The Company’s primary sources of revenue are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary. The Company generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 that significantly affects the determination of the amount and timing of revenue from contracts with customers. Adoption of New Accounting Standards In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU replaces most existing revenue recognition guidance in GAAP. The new standard was effective for the Company on January 1, 2018. Adoption of ASU 2014-09 did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of ASU 2014-09. The Company’s revenue recognition pattern for revenue streams within the scope of ASU 2014-09, including but not limited to service charges on deposit accounts and gains/losses on the sale of OREO, did not change significantly from current practice. The standard permits the use of either the full retrospective or modified retrospective transition method. The Company elected to use the modified retrospective transition method which requires application of ASU 2014-09 to uncompleted contracts at the date of adoption however, periods prior to the date of adoption will not be retrospectively revised as the impact of the ASU on uncompleted contracts at the date of adoption was not material. In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”). The guidance affects the accounting for equity investments, financial liabilities under the fair value option and the presentation and disclosure requirements of financial instruments. ASU 2016-01 was effective for the Company on January 1, 2018 and did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company does not hold any equity securities that are within the scope of ASU 2016-01. ASU 2016-01 also eliminates the disclosure of assumptions used to estimate fair value for financial instruments measured at amortized cost and requires disclosure of an exit price notion in determining the fair value of certain financial instruments prior to its changing to the exit price upon adoption of this standard in the first quarter of 2018. This ASU did not have any other implications to the Company at the time of adoption. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 is intended to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the Statement of Cash Flows, including (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions and (8) separately identifiable cash flows and application of the predominance principle. The ASU was effective for the Company on January 1, 2018 and only impacts the presentation of specific items within the Statement of Cash Flows and did not have a material impact to the Company. In January 2017, FASB issued ASU 2017-01, “Business Combinations (Topic 805), Clarifying the Definition of a Business” (“ASU 2017-01”), that changes the definition of a business when evaluating whether transactions should be accounted for as the acquisition of assets or the acquisition of a business. ASU 2017-01 requires an entity to evaluate if substantially all of the fair value of the assets acquired are concentrated in a single asset or a group of similar identifiable assets; if so, the acquired assets or group of similar identifiable assets is not considered a business. In addition, the guidance requires that, to be considered a business, the acquired assets must include an input and a substantive process that together significantly contribute to the ability to create output. The ASU removes the evaluation of whether a market participant could replace any of the missing elements. ASU 2017-01 was effective for the Company on January 1, 2018 and is to the be applied under a prospective approach. The Company expects the adoption of this new guidance to impact the determination of whether future acquisitions are considered business combinations. In February 2018, FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220)” (“ASU 2018-02”). The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings to eliminate the stranded tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act. ASU 2018-02 will be effective for interim and annual periods beginning after December 15, 2018. Early adoption is permitted, including adoption in any interim period, for public companies for reporting periods for which financial statements have not yet been issued. The Company early adopted ASU 2018-02 as of December 31, 2017 and, as a result, reclassified $1,588,198 from accumulated other comprehensive income to retained earnings as of December 31, 2017. The reclassification impacted the Consolidated Statements of Financial Condition and the Consolidated Statements of Changes in Shareholders’ Equity as of and for the twelve months ended December 31, 2017. Newly Issued, But Not Yet Effective Accounting Standards On September 16, 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The update will significantly change the way entities recognize impairment on many financial assets by requiring immediate recognition of estimated credit losses expected to occur over the asset’s remaining life. The FASB describes this impairment recognition model as the current expected credit loss (“CECL”) model and believes the CECL model will result in more timely recognition of credit losses since the CECL model incorporates expected credit losses versus incurred credit losses. The scope of FASB’s CECL model would include loans, held-to-maturity debt instruments, lease receivables, loan commitments and financial guarantees that are not accounted for at fair value. For public business entities, this update becomes effective for interim and annual periods beginning after December 15, 2019. Management is currently evaluating the impact this ASU will have on the Company’s consolidated financial statements and will continue to monitor FASB’s progress on this topic. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 amends the accounting model and disclosure requirements for leases. The current accounting model for leases distinguishes between capital leases, which are recognized on-balance sheet, and operating leases, which are not. Under the new standard, the lease classifications are defined as finance leases, which are similar to capital leases under current GAAP, and operating leases. Further, a lessee will recognize a lease liability and a right-of-use asset for all leases with a term greater than 12 months on its balance sheet regardless of the lease’s classification, which may significantly increase reported assets and liabilities. The accounting model and disclosure requirements for lessors remains substantially unchanged from current GAAP. ASU 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Management is currently evaluating the impact ASU 2016-02 will have on the Company’s financial position and results of operations. In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) (“ASU 2017-08”). ASU 2017-08 shortens the amortization period for certain callable debt securities held at a premium. Specifically, amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this update more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities due to market participants pricing securities to the call date that produces the worst yield when the coupon is above current market rates, and pricing securities to maturity when the coupon is below market rates in anticipation that the borrower will act in its economic best interest. Therefore, the amendments more closely align interest income recorded on bonds held at a premium or a discount with the economics of the underlying instrument. ASU 2017-08 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Management is currently evaluating the impact ASU 2017-08 will have on the Company’s financial position and results of operations. In May 2017, the FASB issued ASU 2017-09, “Compensation - Stock Compensation (Subtopic 718): Scope of Modification Accounting” (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU 2017-09 will be effective for interim and annual periods beginning after December 15, 2018. The Company is evaluating the effect that ASU 2017-09 will have on its financial position, results of operations and its financial statement disclosures.

Note 1. Summary of Significant Accounting Policies

Basis of Presentation

These interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). However, these interim consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The interim consolidated financial statements are unaudited and reflect all adjustments and reclassifications, which, in the opinion of management, are necessary for a fair presentation of the results of operations and financial condition as of and for the interim periods presented. All adjustments and reclassifications are of a normal and recurring nature. Results for the period ended June 30, 2018 are not necessarily indicative of the results that may be expected for any other interim period or for the year as a whole.

The interim consolidated financial statements of Citizens Holding Company (the “Company”) include the accounts of its wholly-owned subsidiary, The Citizens Bank of Philadelphia (the “Bank” and collectively with Citizens Holding Company, the “Corporation”). All significant intercompany transactions have been eliminated in consolidation.

For further information and significant accounting policies of the Corporation, see the Notes to Consolidated Financial Statements of Citizens Holding Company included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2017, filed with the Securities and Exchange Commission on March 15, 2018.

Nature of Business

The Bank operates under a state bank charter and provides general banking services. As a state bank, the Bank is subject to regulations of the Mississippi Department of Banking and Consumer Finance and the Federal Deposit Insurance Company. The Company is also subject to the regulations of the Federal Reserve. The area served by the Bank is east central and southern counties of Mississippi and the surrounding areas. Services are provided at several branch offices.

Estimates

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

Estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses and the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans. In connection with the determination of the allowance for loan losses and valuation of foreclosed real estate, management obtains independent appraisals for significant properties.

While management uses available information to recognize losses on loans and to value foreclosed real estate, future additions to the allowance or adjustments to the valuation may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and valuations of foreclosed real estate. Such agencies may require the Company to recognize additions to the allowance or to make adjustments to the valuation based on their judgments about information available to them at the time of their examination. Due to these factors, it is reasonably possible that the allowance for loan losses and valuation of foreclosed real estate may change materially in the near term.

Revenue from Contracts with Customers

The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous or future periods.

The Company’s primary sources of revenue are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Consolidated Statements of Income was not necessary. The Company generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 that significantly affects the determination of the amount and timing of revenue from contracts with customers.

Adoption of New Accounting Standards

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU replaces most existing revenue recognition guidance in GAAP. The new standard was effective for the Company on January 1, 2018. Adoption of ASU 2014-09 did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of ASU 2014-09. The Company’s revenue recognition pattern for revenue streams within the scope of ASU 2014-09, including but not limited to service charges on deposit accounts and gains/losses on the sale of OREO, did not change significantly from current practice. The standard permits the use of either the full retrospective or modified retrospective transition method. The Company elected to use the modified retrospective transition method which requires application of ASU 2014-09 to uncompleted contracts at the date of adoption however, periods prior to the date of adoption will not be retrospectively revised as the impact of the ASU on uncompleted contracts at the date of adoption was not material.

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”). The guidance affects the accounting for equity investments, financial liabilities under the fair value option and the presentation and disclosure requirements of financial instruments. ASU 2016-01 was effective for the Company on January 1, 2018 and did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company does not hold any equity securities that are within the scope of ASU 2016-01. ASU 2016-01 also eliminates the disclosure of assumptions used to estimate fair value for financial instruments measured at amortized cost and requires disclosure of an exit price notion in determining the fair value of certain financial instruments prior to its changing to the exit price upon adoption of this standard in the first quarter of 2018. This ASU did not have any other implications to the Company at the time of adoption.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 is intended to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the Statement of Cash Flows, including (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions and (8) separately identifiable cash flows and application of the predominance principle. The ASU was effective for the Company on January 1, 2018 and only impacts the presentation of specific items within the Statement of Cash Flows and did not have a material impact to the Company.

In January 2017, FASB issued ASU 2017-01, “Business Combinations (Topic 805), Clarifying the Definition of a Business” (“ASU 2017-01”), that changes the definition of a business when evaluating whether transactions should be accounted for as the acquisition of assets or the acquisition of a business. ASU 2017-01 requires an entity to evaluate if substantially all of the fair value of the assets acquired are concentrated in a single asset or a group of similar identifiable assets; if so, the acquired assets or group of similar identifiable assets is not considered a business. In addition, the guidance requires that, to be considered a business, the acquired assets must include an input and a substantive process that together significantly contribute to the ability to create output. The ASU removes the evaluation of whether a market participant could replace any of the missing elements. ASU 2017-01 was effective for the Company on January 1, 2018 and is to the be applied under a prospective approach. The Company expects the adoption of this new guidance to impact the determination of whether future acquisitions are considered business combinations.

In February 2018, FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220)” (“ASU 2018-02”). The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings to eliminate the stranded tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act. ASU 2018-02 will be effective for interim and annual periods beginning after December 15, 2018. Early adoption is permitted, including adoption in any interim period, for public companies for reporting periods for which financial statements have not yet been issued. The Company early adopted ASU 2018-02 as of December 31, 2017 and, as a result, reclassified $1,588,198 from accumulated other comprehensive income to retained earnings as of December 31, 2017. The reclassification impacted the Consolidated Statements of Financial Condition and the Consolidated Statements of Changes in Shareholders’ Equity as of and for the twelve months ended December 31, 2017.

Newly Issued, But Not Yet Effective Accounting Standards

On September 16, 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The update will significantly change the way entities recognize impairment on many financial assets by requiring immediate recognition of estimated credit losses expected to occur over the asset’s remaining life. The FASB describes this impairment recognition model as the current expected credit loss (“CECL”) model and believes the CECL model will result in more timely recognition of credit losses since the CECL model incorporates expected credit losses versus incurred credit losses. The scope of FASB’s CECL model would include loans, held-to-maturity debt instruments, lease receivables, loan commitments and financial guarantees that are not accounted for at fair value. For public business entities, this update becomes effective for interim and annual periods beginning after December 15, 2019. Management is currently evaluating the impact this ASU will have on the Company’s consolidated financial statements and will continue to monitor FASB’s progress on this topic.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 amends the accounting model and disclosure requirements for leases. The current accounting model for leases distinguishes between capital leases, which are recognized on-balance sheet, and operating leases, which are not. Under the new standard, the lease classifications are defined as finance leases, which are similar to capital leases under current GAAP, and operating leases. Further, a lessee will recognize a lease liability and a right-of-use asset for all leases with a term greater than 12 months on its balance sheet regardless of the lease’s classification, which may significantly increase reported assets and liabilities. The accounting model and disclosure requirements for lessors remains substantially unchanged from current GAAP. ASU 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Management is currently evaluating the impact ASU 2016-02 will have on the Company’s financial position and results of operations.

In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) (“ASU 2017-08”). ASU 2017-08 shortens the amortization period for certain callable debt securities held at a premium. Specifically, amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this update more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities due to market participants pricing securities to the call date that produces the worst yield when the coupon is above current market rates, and pricing securities to maturity when the coupon is below market rates in anticipation that the borrower will act in its economic best interest. Therefore, the amendments more closely align interest income recorded on bonds held at a premium or a discount with the economics of the underlying instrument. ASU 2017-08 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Management is currently evaluating the impact ASU 2017-08 will have on the Company’s financial position and results of operations.

In May 2017, the FASB issued ASU 2017-09, “Compensation - Stock Compensation (Subtopic 718): Scope of Modification Accounting” (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU 2017-09 will be effective for interim and annual periods beginning after December 15, 2018. The Company is evaluating the effect that ASU 2017-09 will have on its financial position, results of operations and its financial statement disclosures.