Consolidated Statement of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME
Interest and fees on loans	$ 5,843	$ 5,694
Interest-bearing deposits in other institutions	8	5
Federal funds sold	3us-gaap_InterestIncomeFederalFundsSold	3us-gaap_InterestIncomeFederalFundsSold
Taxable interest	395us-gaap_InterestIncomeSecuritiesTaxable	509us-gaap_InterestIncomeSecuritiesTaxable
Tax-exempt interest	759	755
Dividends on stock	27us-gaap_DividendIncomeOperating	23us-gaap_DividendIncomeOperating
Total interest income	7,035	6,989
INTEREST EXPENSE
Deposits	831us-gaap_InterestExpenseDeposits	940us-gaap_InterestExpenseDeposits
Short-term borrowings	37	35
Other borrowings	23us-gaap_InterestExpenseOther	32us-gaap_InterestExpenseOther
Trust preferred securities	(8)	26
Total interest expense	883us-gaap_InterestExpense	1,033us-gaap_InterestExpense
NET INTEREST INCOME	6,152us-gaap_InterestIncomeExpenseNet	5,956us-gaap_InterestIncomeExpenseNet
Provision for loan losses	105us-gaap_ProvisionForLoanLossesExpensed	180us-gaap_ProvisionForLoanLossesExpensed
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	6,047	5,776
NONINTEREST INCOME
Service charges on deposit accounts	441	441
Investment securities gains (losses), net	24us-gaap_GainLossOnSaleOfSecuritiesNet	(6)us-gaap_GainLossOnSaleOfSecuritiesNet
Earnings on bank-owned life insurance	69us-gaap_BankOwnedLifeInsuranceIncome	67us-gaap_BankOwnedLifeInsuranceIncome
Gain on sale of loans	53us-gaap_GainLossOnSalesOfLoansNet
Other income	209us-gaap_NoninterestIncomeOther	213us-gaap_NoninterestIncomeOther
Total noninterest income	796us-gaap_NoninterestIncome	715us-gaap_NoninterestIncome
NONINTEREST EXPENSE
Salaries and employee benefits	2,360us-gaap_LaborAndRelatedExpense	2,016us-gaap_LaborAndRelatedExpense
Occupancy expense	349us-gaap_OccupancyNet	321us-gaap_OccupancyNet
Equipment expense	216us-gaap_EquipmentExpense	220us-gaap_EquipmentExpense
Data processing costs	250	214
Ohio state franchise tax	75mbcn_OhioStateFranchiseTax	83mbcn_OhioStateFranchiseTax
Federal deposit insurance expense	112	132
Professional fees	319us-gaap_ProfessionalFees	287us-gaap_ProfessionalFees
Loss (gain) on other real estate owned	88	(5)
Advertising expense	196us-gaap_MarketingAndAdvertisingExpense	123us-gaap_MarketingAndAdvertisingExpense
Other real estate expense	65us-gaap_ForeclosedRealEstateExpense	63us-gaap_ForeclosedRealEstateExpense
Directors fees	118us-gaap_GeneralAndAdministrativeExpense	86us-gaap_GeneralAndAdministrativeExpense
Other expense	663us-gaap_OtherNoninterestExpense	689us-gaap_OtherNoninterestExpense
Total noninterest expense	4,811us-gaap_NoninterestExpense	4,229us-gaap_NoninterestExpense
Income before income taxes	2,032	2,262
Income taxes	404us-gaap_IncomeTaxExpenseBenefit	499us-gaap_IncomeTaxExpenseBenefit
NET INCOME	$ 1,628us-gaap_NetIncomeLoss	$ 1,763us-gaap_NetIncomeLoss
EARNINGS PER SHARE
Basic (in Dollars per share)	$ 0.79us-gaap_EarningsPerShareBasic	$ 0.87us-gaap_EarningsPerShareBasic
Diluted (in Dollars per share)	$ 0.79us-gaap_EarningsPerShareDiluted	$ 0.86us-gaap_EarningsPerShareDiluted
DIVIDENDS DECLARED PER SHARE (in Dollars per share)	$ 0.26	$ 0.26

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The total expense recognized in the period for promotion, public relations, and brand or product advertising.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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Represents the total of noninterest income derived from certain activities and assets including (for example): (1) venture capital investments; (2) bank owned life insurance; (3) foreign currency transactions; and (4) mortgage servicing rights.

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Amount of expense related to loss from loan transactions.

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