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Stock Compensation Plans (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Apr. 30, 2014
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 325,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Allocated Share-based Compensation Expense $ 53,000us-gaap_AllocatedShareBasedCompensationExpense $ 42,000us-gaap_AllocatedShareBasedCompensationExpense  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 8 months 12 days    
2014 Stock Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     176,866us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndFourteenStockIncentivePlanMember
2014 Stock Incentive Plan [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     83,433us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndFourteenStockIncentivePlanMember
2014 Stock Incentive Plan [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     88,433us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndFourteenStockIncentivePlanMember
2007 Stock Incentive Plan and Trust [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     177,496us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndSevenStockIncentivePlanAndTrustMember
2007 Stock Incentive Plan and Trust [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     1,663us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndSevenStockIncentivePlanAndTrustMember
2007 Stock Incentive Plan and Trust [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     45,283us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= emcf_TwoThousandAndSevenStockIncentivePlanAndTrustMember