Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Use of Estimates, Policy [Policy Text Block]	Use of Estimates In preparing financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the 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, the fair values of securities, fair value of financial instruments, the valuation of other real estate owned and the valuation of deferred income tax assets.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents include cash, balances due from banks, fed funds sold and non-maturity deposits in the Federal Home Loan Bank of Chicago (FHLB). The Company may at times maintain balances at financial institutions that exceed federally insured limits. The Company has not experienced any losses in such accounts.
Marketable Securities, Policy [Policy Text Block]	Available for Sale Securities Securities classified as available for sale are those securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as available for sale would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company's assets and liabilities, liquidity needs, regulatory capital requirements, and other similar factors. Securities classified as available for sale are carried at fair value. Unrealized gains or losses are reported as increases or decreases in other comprehensive income, net of the related deferred tax effect. Realized gains or losses, determined on the basis of the cost of specific securities sold, are included in earnings. Gains and losses on the sale of securities are recorded on the trade date and determined using the specific-identification method. Declines in fair value of securities that are deemed to be other than temporary, if applicable, are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, management considers the length of time and the extent to which fair value has been less than cost, the financial condition and near-term prospects of the issuer, and the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient enough to allow for any anticipated recovery in fair value.
Certain Loans and Debt Securities Acquired in Transfer, Recognizing Interest Income on Impaired Loans, Policy [Policy Text Block]	Loans Acquired in a Transfer The Company acquires loans (including debt securities) individually and in groups or portfolios. These loans are initially measured at fair value with no allowance for loan losses. The Company's allowance for loan losses on all acquired loans reflect only those losses incurred subsequent to acquisition. Certain acquired loans may have experienced deterioration of credit quality between origination and the Company's acquisition of the loans. At acquisition, the Company reviews each loan to determine whether there is evidence of deterioration of credit quality since origination and if it is probable that the Company will be unable to collect all amounts due according to the loan's contractual terms. If both conditions exist, the Company determines whether each such loan is to be accounted for individually or whether such loans will be assembled into pools of loans based on common risk characteristics (for example, credit score, loan type, and date of origination). The Company considers expected prepayments and estimates the amount and timing of undiscounted principal, interest, and other cash flows expected at acquisition for each loan and aggregated pool of loans. The excess of the loan's or pool's scheduled contractual principal and interest payments over all cash flows expected at acquisition is calculated as the nonaccretable difference. The excess of cash flows expected to be collected over the fair value of each loan or pool (accretable yield) is accreted into interest income over the remaining life of the loan or pool. At each reporting date, the Company continues to estimate cash flows expected to be collected for each loan or pool. If expected cash flows have decreased from the acquisition date estimate, the Company recognizes an allowance for loan losses. If expected cash flows have increased from the acquisition date estimate, the Company increases the amount of accretable yield to be recognized as interest income over the remaining life of the loan or pool.
Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block]	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff generally are reported at their outstanding unpaid principal balances adjusted for deferred loan fees and costs, charge-offs, and an allowance for loan losses. Interest on loans is accrued and credited to income based on the unpaid principal balance. Loan-origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. The accrual of interest on loans is discontinued when, in the opinion of management, there is an indication that the borrower may be unable to make payments as they become due. When loans are placed on nonaccrual status or charged off, all unpaid accrued interest is reversed against interest income. The interest on these loans is subsequently accounted for on the cash-basis or cost-recovery method until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan Losses The allowance for loan losses is maintained at the level considered adequate by management to provide for losses that are probable as of the balance sheet date. The allowance for loan losses is established through a provision for loan losses charged to expense as losses are estimated to have occurred. Loan losses are charged against the allowance when management believes that the collectability of the principal is unlikely. Subsequent recoveries, if any, are credited to the allowance. In determining the adequacy of the allowance balance, the Company makes evaluations of the loan portfolio and related off-balance sheet commitments, considers current economic conditions and historical loss experience, and reviews specific problem loans and other factors. When establishing the allowance for loan losses, management categorizes loans into risk categories generally based on the nature of the collateral and the basis of repayment. These risk categories and their relevant risk characteristics are as follows: Commercial development : These loans are secured by vacant land and/or property that are in the process of improvement. Repayment of these loans can be dependent on the sale of the property to third parties or the successful completion of the improvements by the builder for the end user. Construction loans include not only construction of new structures, but loans originated to finance additions to or alterations of existing structures. Until a permanent loan originates, or payoff occurs, all commercial construction loans secured by real estate are reported in this loan pool. Development loans also have the risk that improvements will not be completed on time, or in accordance with specifications and projected costs. Commercial real estate : These loans are primarily secured by office and industrial buildings, warehouses, small retail shopping facilities, and various special purpose properties, including restaurants. These loans are subject to underwriting standards and processes similar to commercial and industrial loans. Loans to closely held businesses are generally guaranteed in full by the owners of the business. These loans are viewed primarily as cash flow loans and the repayment of these loans is largely dependent on the successful operation of the property. The cash flows of the borrowers, however, may not behave as forecasted and collateral securing loans may fluctuate in value due to the general economic factors or conditions specific to the real estate market, such as geographic location and/or purpose type. Commercial and industrial : Commercial and industrial loans are extended primarily to small and middle market customers. Such credits typically comprise working capital loans, asset acquisition loans, and loans for other business purposes. Loans to closely held businesses are generally guaranteed in full by the owners of the business. Commercial and industrial loans are made based primarily on the historical and projected cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of the borrowers, however, may not behave as forecasted and collateral securing loans may fluctuate in value due to economic or individual performance factors. Minimum standards and underwriting guidelines have been established for commercial and industrial loans. 1 - 4 family owner-occupied: These loans are generally to individuals and are underwritten by evaluating the credit history of the borrower, the ability of the borrower to meet the debt service requirements of the loan and total debt obligations, the underlying collateral, and the loan to collateral value. Also included in this category are junior liens on 1 - 4 family residential properties. Underwriting standards for single family loans are heavily influenced by statutory requirements, which include, but are not limited to, loan-to-value and affordability ratios, risk-based pricing strategies, and documentation requirements. 1 - 4 family investor-owned: These loans may be to individuals or businesses and are subject to underwriting standards and processes similar to commercial and industrial loans. These loans are viewed primarily as cash flow loans and the repayment of these loans is largely dependent on the successful operation of the property(ies). The cash flows of the borrowers, however, may not behave as forecasted and collateral securing loans may fluctuate in value due to the general economic factors or conditions specific to the real estate market, such as geographic location and/or purpose type. Multifamily real estate: These loans include loans to finance non-farm properties with five or more units in structures primarily to accommodate households. Such credits are typically originated to finance the acquisition or refinancing of an apartment building. These loans are subject to underwriting standards and processes similar to commercial and industrial loans. Loans to closely held businesses are generally guaranteed in full by the owners of the business. These loans are viewed primarily as cash flow loans and the repayment of these loans is largely dependent on the successful operation of the subject multifamily property, with assumptions made for vacancy rates. Cash flows of the borrowers rely on the receipt of rental income from the tenants of the property who are themselves subject to fluctuations in national and local economic conditions and unemployment trends. Consumer: These loans may take the form of installment loans, demand loans, or single payment loans, and are extended to individuals for household, family, and other personal expenditures. These loans generally include direct consumer automobile loans and credit card loans. These loans are generally smaller in size and are underwritten by evaluating the credit history of the borrower, the ability of the borrower to meet the debt service requirements of the loan and total debt obligations. Management regularly evaluates the allowance for loan losses using the Company’s past loan loss experience, known and inherent risks in the loan portfolio, composition of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, current economic conditions, and other relevant factors. This evaluation is inherently subjective since it requires material estimates that may be susceptible to significant change. A loan is impaired when, based on current information, it is probable that the Company will not collect all amounts due in accordance with the contractual terms of the loan agreement. Management determines whether a loan is impaired on a case-by-case basis, taking into consideration the payment status, collateral value, length and reason of any payment delays, the borrower’s prior payment record, and any other relevant factors. Large groups of smaller-balance homogeneous loans, such as residential mortgage and consumer loans, are collectively evaluated in the allowance for loan losses analysis and are not subject to impairment analysis unless such loans have been subject to a restructuring agreement. Specific allowances for impaired loans are based on discounted cash flows of expected future payments using the loan’s initial effective interest rate or the fair value of the collateral if the loan is collateral dependent. In addition, various regulatory agencies periodically review the allowance for loan losses. These agencies may require the Company to make additions to the allowance for loan losses based on their judgments of collectability based on information available to them at the time of their examination.
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	Troubled Debt Restructurings Loans are accounted for as troubled debt restructurings when a borrower is experiencing financial difficulties that lead to a restructuring of the loan, and the Company grants a “concession” to the borrower that they would not otherwise consider. These concessions include a modification of terms such as a reduction of the stated interest rate or loan balance, a reduction of accrued interest, an extension of the maturity date at an interest rate lower than a current market rate for a new loan with similar risk, or some combination thereof to facilitate repayment. Troubled debt restructurings are considered impaired loans.
Finance Loan and Lease Receivables Held for Sale Foreclosed Assets [Policy Text Block]	Foreclosed Assets Assets acquired through, or in lieu of, loan foreclosure are held for sale and are initially recorded at fair value, less costs to sell, at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management, and the assets are carried at the lower of carrying amount or fair value less costs to sell. Revenue and expenses from operations and changes in the valuation allowance are included in net expenses from foreclosed assets.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Depreciable assets are stated at cost less accumulated depreciation. Provisions for depreciation are computed on straight-line and accelerated methods over the estimated useful lives of the assets.
Federal Home Loan Bank Stock [Policy Text Block]	Federal Home Loan Bank Stock The Company's investment in Federal Home Loan Bank ("FHLB") stock is carried at cost, which approximates fair value. The Company is required to hold the stock as a member of the FHLB, and transfer of the stock is substantially restricted. The stock is evaluated for impairment on an annual basis.
Income Tax, Policy [Policy Text Block]	Income Taxes Amounts provided for income tax expense are based on income reported for financial statement purposes and do not necessarily represent amounts currently payable under tax laws. Deferred income tax assets and liabilities are computed annually for differences between the financial statement and income tax basis of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. As changes in tax laws or rates are enacted, deferred income tax assets and liabilities are adjusted through the provision for income taxes. The differences relate principally to the allowances for loan losses, deferred compensation, depreciation, FHLB stock dividends and non-accrual interest. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. The tax effects from an uncertain tax position can be recognized in the financial statements only if the position is more likely than not to be sustained on audit, based on the technical merits of the position. The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more likely than not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. Based on its evaluation, the Company has concluded that there are no significant uncertain tax positions requiring recognition in its financial statements. The Company's policy is to recognize interest and penalties related to income tax issues as components of income tax expense. During the periods shown, the Company did not recognize any interest or penalties related to income tax expense in its statement of income.
Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Sales, Policy [Policy Text Block]	Transfers of Financial Assets Transfers of financial assets 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 their maturity.
Advertising Costs, Policy [Policy Text Block]	Advertising Advertising costs are expensed as incurred.
Comprehensive Income, Policy [Policy Text Block]	Other Comprehensive Income (Loss) Other comprehensive loss is shown on the statements of comprehensive income (loss). The Company’s accumulated other comprehensive income (loss) is composed of the unrealized loss on securities available for sale, net of tax and is shown on the statements of equity. Reclassification adjustments out of other comprehensive loss for gains realized on sales of securities available for sale comprise the entire balance of “net gain on sale of securities” on the statements of income.
Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]	Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company has entered into off-balance-sheet financial instruments consisting of commitments to extend credit, unfunded commitments under lines of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable.
Life Insurance [Policy Text Block]	Life Insurance The Company has purchased life insurance policies on certain key executives. Life insurance is measured at the amount that could be realized under the insurance contract as of the balance sheet date, which is generally the cash surrender value of the policy.
Subsequent Events, Policy [Policy Text Block]	Subsequent Events Management has reviewed the Company’s operations for potential disclosure or financial statement impacts related to events occurring after June 30, 2018, but prior to the release of these financial statements. Based on the results of this review, no subsequent event disclosure or financial statement impacts to these financial statements are required as of August 6, 2018.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements The Company qualifies as an “emerging growth company” under the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). For as long as the Company is an emerging growth company, it may choose to take advantage of exemptions from various reporting requirements applicable to other public companies. An emerging growth company may elect to use the extended transition period to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies, but must make such election when the Company is first required to file a registration statement. The Company has elected to use the extended transition period described above and intends to maintain its emerging growth company status as allowed under the JOBS Act. The following Accounting Standards Updates (ASUs) have been issued by the Financial Accounting Standards Board (FASB) and may impact the Company's financial statements in future reporting periods. ASU No. 2016 - 13, “Credit Losses (Topic 326 ).” ASU 2016 - 13 requires organizations to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption will be permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently assessing the impact of adopting ASU 2016 - 13 on its financial statements. ASU 2016 - 02 “Leases.” ASU 2016 - 02 affects any entity that enters into a lease and is intended to increase the transparency and comparability of financial statements among organizations. The ASU requires, among other changes, a lessee to recognize on its balance sheet a lease asset and a lease liability for those leases previously classified as operating leases. The lease asset would represent the right to use the underlying asset for the lease term and the lease liability would represent the discounted value of the required lease payments to the lessor. The ASU would also require entities to disclose key information about leasing arrangements. ASU 2016 - 02 is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted. Management is currently evaluating the impact that ASU 2016 - 02 will have on the Company’s consolidated financial position, results of operations and disclosures. ASU No. 2016 - 01, “Recognition and Measurement of Financial Assets and Financial Liabilities”. The standard makes a number of changes to the recognition and measurement standards of financial instruments, including the following changes: 1 ) equity securities with a readily determinable fair value will have to be measured at fair value with changes in fair value recognized in net income; 2 ) entities that are public business entities will no longer be required to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost; and 3 ) entities that are public business entities will be required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. This standard is effective for financial statements issued for annual reporting periods, and interim periods within those annual periods, beginning after December 15, 2018. The adoption of this standard is not expected to have a material impact on our financial condition or results of operations, except that the Company will no longer disclose the method(s) and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost. ASU No. 2014 - 09, “Revenue from Contracts with Customers (Topic 606 )”. The amendment supersedes and replaces nearly all existing revenue recognition guidance. Under the amended guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This guidance is effective for annual and interim periods beginning after December 15, 2018. Adoption of ASU No. 2014 - 04 and ASU 2015 - 14 is not expected to have a material impact on the Company’s financial statements, but significant disclosures to the Notes thereto will be required.