Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The consolidated financial statements include ChoiceOne Financial Services, Inc. ("ChoiceOne"), its wholly-owned subsidiary, ChoiceOne Bank, and ChoiceOne Bank’s wholly-owned subsidiary, ChoiceOne Insurance Agencies, Inc. (the "Insurance Agency"). Intercompany transactions and balances have been eliminated in consolidation. ChoiceOne owns all of the common securities of Community Shores Capital Trust I (the “Capital Trust”). Under U.S. generally accepted accounting principles ("GAAP"), the Capital Trust is not consolidated because it is a variable interest entity and ChoiceOne is not the primary beneficiary. The accompanying unaudited consolidated financial statements and notes thereto reflect all adjustments ordinary in nature which are, in the opinion of management, necessary for a fair presentation of the Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, the Consolidated Statements of Income for the three-month periods ended March 31, 2022 and March 31, 2021, the Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2022 and March 31, 2021, the Consolidated Statements of Changes in Shareholders’ Equity for the three months ended March 31, 2022 and March 31, 2021, and the Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2022 and March 31, 2021. Operating results for the three months ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. The accompanying consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in ChoiceOne’s Annual Report on Form 10-K for the year ended December 31, 2021.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates To prepare financial statements in conformity with GAAP, ChoiceOne’s management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. These estimates and assumptions are subject to many risks and uncertainties, including changes in interest rates and other general economic, business and political conditions, including the effects of the COVID-19 pandemic, and its potential effects on the economic environment, our customers and our operations, as well as any changes to federal, state and local government laws, regulations and orders in connection with the pandemic. Actual results may differ from these estimates. Estimates associated with the allowance for loan losses are particularly susceptible to change.
Marketable Securities, Policy [Policy Text Block]	Investment Securities Investment securities for which ChoiceOne has the intent and ability to hold to maturity are classified as held to maturity and are carried at amortized cost. Investment securities not classified as held to maturity are classified as available for sale and are reported at fair value with unrealized gains and losses, net of income taxes, as a separate component of other comprehensive income. ChoiceOne determines the appropriate classification of investment securities at the time of purchase and reassesses the classification at each reporting date.
Mortgage Banking Activity [Policy Text Block]	Loans to Other Financial Institutions ChoiceOne Bank entered into an agreement with another financial institution to fund mortgage loans. Loans to other financial institutions are purchased participating interests in individual advances made to mortgage bankers nation-wide from an unaffiliated originating bank. The originating bank services these loans and cash flows on the individual advances (principal, interest, and fees) which are allocated pro-rata based on ownership in the participating interest, less fees paid for the servicing activity. The underlying collateral is generally made up of 1-4 family first residential mortgages owned by the mortgage banker and held for sale in the secondary market and have been underwritten using secondary market underwriting standards prior to purchasing the participating interest. Once the mortgage banker delivers the loan to the secondary market, the advance is required to be paid off, including ChoiceOne Bank’s participating interest. If the advance (in which ChoiceOne Bank has a participating interest) is outstanding over 90 days, the originating bank has the right to request the participating interest be paid off by the mortgage banker. There was no participating interest as of March 31, 2022. Credit risk associated with the participating interest is measured as an allowance for loan losses when necessary. Losses are charged off against the allowance when incurred and recoveries of loan charge-offs are recorded when received. At least quarterly, ChoiceOne Bank reviews the portfolios of participating interests for potential losses including any participating interest that is outstanding over 90 days (even if the advance and participating interest is current). Loans to other financial institutions are excluded from the loans described in Note 3 to the interim consolidated financial statements.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of the acquired tangible assets and liabilities and identifiable intangible assets. Goodwill and intangible assets acquired in a purchase 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.
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Core Deposit Intangible Core deposit intangible represents the value of the acquired customer core deposit bases and is included as an asset on the consolidated balance sheets. The core deposit intangible has an estimated finite life, is amortized on an accelerated basis over a 120 month period and is subject to periodic impairment evaluation.
Stockholders' Equity, Policy [Policy Text Block]	Stock Transactions A total of 3,698 shares of common stock were issued to ChoiceOne’s Board of Directors for a cash price of $98,000 under the terms of the Directors’ Stock Purchase Plan in the first quarter of 2022. A total of 1,634 shares for a cash price of $35,000 were issued under the Employee Stock Purchase Plan in the first quarter of 2022. ChoiceOne repurchased 25,899 shares for $682,000, or a weighted average all-in cost per share of $26.35, during the first quarter of 2022. This was part of the common stock repurchase program announced in April 2021 which authorized repurchases of up to 390,114 shares, representing 5% of the total outstanding shares of common stock as of the date the program was adopted.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan Losses The allowance for loan losses is a valuation allowance for probable incurred credit losses. The allowance for loan losses is increased by the provision for loan losses and decreased by loans charged off less any recoveries of charged off loans. Management estimates the allowance for loan losses balance required based on past loan loss experience, the nature and volume of the loan portfolio, information about specific borrower situations and estimated collateral values, economic conditions, and other factors. Allocations of the allowance for loan losses may be made for specific loans, but the entire allowance for loan losses is available for any loan that, in management’s judgment, should be charged off. Loan losses are charged against the allowance for loan losses when management believes that collection of a loan balance is not possible. The allowance for loan losses consists of general and specific components. The general component covers non-classified loans and is based on historical loss experience adjusted for current factors. The specific component relates to loans that are individually classified as impaired or loans otherwise classified as substandard or doubtful. The general component of management's estimate of the allowance for loan losses covers non-impaired loans and is based on historical loss experience adjusted for current factors. Management's adjustment for current factors is based on trends in delinquencies, trends in charge-offs and recoveries, trends in the volume of loans, changes in underwriting standards, trends in loan review findings, experience and ability of lending staff, national and economic trends and conditions, industry conditions, trends in real estate values, and other conditions. A loan is impaired when full payment under the loan terms is not expected. Troubled debt restructuring of loans is undertaken to improve the likelihood that the loan will be repaid in full under the modified terms in accordance with a reasonable repayment schedule. All modified loans are evaluated to determine whether the loans should be reported as Troubled Debt Restructurings ("TDR"). A loan is a TDR when the Bank, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower by modifying a loan. To make this determination, the Bank must determine whether (a) the borrower is experiencing financial difficulties and (b) the Bank granted the borrower a concession. This determination requires consideration of all facts and circumstances surrounding the modification. An overall general decline in the economy or some deterioration in a borrower’s financial condition does not automatically mean the borrower is experiencing financial difficulties. Commercial loans are evaluated for impairment on an individual loan basis. If a loan is considered impaired or if a loan has been classified as a TDR, a portion of the allowance for loan losses is allocated to the loan so that it is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. Large groups of smaller-balance homogeneous loans such as consumer and residential real estate mortgage loans are collectively evaluated for impairment and, accordingly, they are not separately identified for impairment disclosures.
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassifications Certain amounts presented in prior periods have been reclassified to conform to the current presentation.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements The Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU provides financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date by replacing the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The new guidance attempts to reflect an entity’s current estimate of all expected credit losses and broadens the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually to include forecasted information, as well as past events and current conditions. There is no specified method for measuring expected credit losses, and an entity may apply methods that reasonably reflect its expectations of the credit loss estimate. Although an entity may still use its current systems and methods for recording the allowance for credit losses, under the new rules, the inputs used to record the allowance for credit losses generally will need to change to appropriately reflect an estimate of all expected credit losses and the use of reasonable and supportable forecasts. Additionally, credit losses on available-for-sale debt securities will have to be presented as an allowance rather than as a write-down. This ASU is effective for fiscal years beginning after December 15, 2022, and for interim periods within those years for companies considered smaller reporting companies with the Securities and Exchange Commission. ChoiceOne was classified as a smaller reporting company as of the measurement date. Management is currently evaluating the impact of this new ASU on its consolidated financial statements which may be significant.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Consolidation, Policy [Policy Text Block]

Principles of Consolidation

The consolidated financial statements include ChoiceOne Financial Services, Inc. ("ChoiceOne"), its wholly-owned subsidiary, ChoiceOne Bank, and ChoiceOne Bank’s wholly-owned subsidiary, ChoiceOne Insurance Agencies, Inc. (the "Insurance Agency"). Intercompany transactions and balances have been eliminated in consolidation.

ChoiceOne owns all of the common securities of Community Shores Capital Trust I (the “Capital Trust”). Under U.S. generally accepted accounting principles ("GAAP"), the Capital Trust is not consolidated because it is a variable interest entity and ChoiceOne is not the primary beneficiary.

The accompanying unaudited consolidated financial statements and notes thereto reflect all adjustments ordinary in nature which are, in the opinion of management, necessary for a fair presentation of the Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, the Consolidated Statements of Income for the three-month periods ended March 31, 2022 and March 31, 2021, the Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2022 and March 31, 2021, the Consolidated Statements of Changes in Shareholders’ Equity for the three months ended March 31, 2022 and March 31, 2021, and the Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2022 and March 31, 2021. Operating results for the three months ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022.

The accompanying consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in ChoiceOne’s Annual Report on Form 10-K for the year ended December 31, 2021.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

To prepare financial statements in conformity with GAAP, ChoiceOne’s management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. These estimates and assumptions are subject to many risks and uncertainties, including changes in interest rates and other general economic, business and political conditions, including the effects of the COVID-19 pandemic, and its potential effects on the economic environment, our customers and our operations, as well as any changes to federal, state and local government laws, regulations and orders in connection with the pandemic. Actual results may differ from these estimates. Estimates associated with the allowance for loan losses are particularly susceptible to change.

Marketable Securities, Policy [Policy Text Block]

Investment Securities

Investment securities for which ChoiceOne has the intent and ability to hold to maturity are classified as held to maturity and are carried at amortized cost. Investment securities not classified as held to maturity are classified as available for sale and are reported at fair value with unrealized gains and losses, net of income taxes, as a separate component of other comprehensive income. ChoiceOne determines the appropriate classification of investment securities at the time of purchase and reassesses the classification at each reporting date.

Mortgage Banking Activity [Policy Text Block]

Loans to Other Financial Institutions

ChoiceOne Bank entered into an agreement with another financial institution to fund mortgage loans. Loans to other financial institutions are purchased participating interests in individual advances made to mortgage bankers nation-wide from an unaffiliated originating bank. The originating bank services these loans and cash flows on the individual advances (principal, interest, and fees) which are allocated pro-rata based on ownership in the participating interest, less fees paid for the servicing activity. The underlying collateral is generally made up of 1-4 family first residential mortgages owned by the mortgage banker and held for sale in the secondary market and have been underwritten using secondary market underwriting standards prior to purchasing the participating interest. Once the mortgage banker delivers the loan to the secondary market, the advance is required to be paid off, including ChoiceOne Bank’s participating interest. If the advance (in which ChoiceOne Bank has a participating interest) is outstanding over 90 days, the originating bank has the right to request the participating interest be paid off by the mortgage banker. There was no participating interest as of March 31, 2022.

Credit risk associated with the participating interest is measured as an allowance for loan losses when necessary. Losses are charged off against the allowance when incurred and recoveries of loan charge-offs are recorded when received. At least quarterly, ChoiceOne Bank reviews the portfolios of participating interests for potential losses including any participating interest that is outstanding over 90 days (even if the advance and participating interest is current). Loans to other financial institutions are excluded from the loans described in Note 3 to the interim consolidated financial statements.

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

Goodwill

Goodwill results from business acquisitions and represents the excess of the purchase price over the fair value of the acquired tangible assets and liabilities and identifiable intangible assets. Goodwill and intangible assets acquired in a purchase 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.

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

Core Deposit Intangible

Core deposit intangible represents the value of the acquired customer core deposit bases and is included as an asset on the consolidated balance sheets. The core deposit intangible has an estimated finite life, is amortized on an accelerated basis over a 120 month period and is subject to periodic impairment evaluation.

Stockholders' Equity, Policy [Policy Text Block]

Stock Transactions

A total of 3,698 shares of common stock were issued to ChoiceOne’s Board of Directors for a cash price of $98,000 under the terms of the Directors’ Stock Purchase Plan in the first quarter of 2022. A total of 1,634 shares for a cash price of $35,000 were issued under the Employee Stock Purchase Plan in the first quarter of 2022. ChoiceOne repurchased 25,899 shares for $682,000, or a weighted average all-in cost per share of $26.35, during the first quarter of 2022. This was part of the common stock repurchase program announced in April 2021 which authorized repurchases of up to 390,114 shares, representing 5% of the total outstanding shares of common stock as of the date the program was adopted.

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

Allowance for Loan Losses

The allowance for loan losses is a valuation allowance for probable incurred credit losses. The allowance for loan losses is increased by the provision for loan losses and decreased by loans charged off less any recoveries of charged off loans. Management estimates the allowance for loan losses balance required based on past loan loss experience, the nature and volume of the loan portfolio, information about specific borrower situations and estimated collateral values, economic conditions, and other factors. Allocations of the allowance for loan losses may be made for specific loans, but the entire allowance for loan losses is available for any loan that, in management’s judgment, should be charged off. Loan losses are charged against the allowance for loan losses when management believes that collection of a loan balance is not possible.

The allowance for loan losses consists of general and specific components. The general component covers non-classified loans and is based on historical loss experience adjusted for current factors. The specific component relates to loans that are individually classified as impaired or loans otherwise classified as substandard or doubtful. The general component of management's estimate of the allowance for loan losses covers non-impaired loans and is based on historical loss experience adjusted for current factors. Management's adjustment for current factors is based on trends in delinquencies, trends in charge-offs and recoveries, trends in the volume of loans, changes in underwriting standards, trends in loan review findings, experience and ability of lending staff, national and economic trends and conditions, industry conditions, trends in real estate values, and other conditions.

A loan is impaired when full payment under the loan terms is not expected. Troubled debt restructuring of loans is undertaken to improve the likelihood that the loan will be repaid in full under the modified terms in accordance with a reasonable repayment schedule. All modified loans are evaluated to determine whether the loans should be reported as Troubled Debt Restructurings ("TDR"). A loan is a TDR when the Bank, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower by modifying a loan. To make this determination, the Bank must determine whether (a) the borrower is experiencing financial difficulties and (b) the Bank granted the borrower a concession. This determination requires consideration of all facts and circumstances surrounding the modification. An overall general decline in the economy or some deterioration in a borrower’s financial condition does not automatically mean the borrower is experiencing financial difficulties. Commercial loans are evaluated for impairment on an individual loan basis. If a loan is considered impaired or if a loan has been classified as a TDR, a portion of the allowance for loan losses is allocated to the loan so that it is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. Large groups of smaller-balance homogeneous loans such as consumer and residential real estate mortgage loans are collectively evaluated for impairment and, accordingly, they are not separately identified for impairment disclosures.

Reclassification, Comparability Adjustment [Policy Text Block]

Reclassifications

Certain amounts presented in prior periods have been reclassified to conform to the current presentation.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

The Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU provides financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date by replacing the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The new guidance attempts to reflect an entity’s current estimate of all expected credit losses and broadens the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually to include forecasted information, as well as past events and current conditions. There is no specified method for measuring expected credit losses, and an entity may apply methods that reasonably reflect its expectations of the credit loss estimate. Although an entity may still use its current systems and methods for recording the allowance for credit losses, under the new rules, the inputs used to record the allowance for credit losses generally will need to change to appropriately reflect an estimate of all expected credit losses and the use of reasonable and supportable forecasts. Additionally, credit losses on available-for-sale debt securities will have to be presented as an allowance rather than as a write-down. This ASU is effective for fiscal years beginning after December 15, 2022, and for interim periods within those years for companies considered smaller reporting companies with the Securities and Exchange Commission. ChoiceOne was classified as a smaller reporting company as of the measurement date. Management is currently evaluating the impact of this new ASU on its consolidated financial statements which may be significant.