XML 46 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 4 - Loans and Related Allowance for Loan Losses (Details) - Troubled Debt Restructurings (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Rate Forgiveness [Member] | Residential Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts   7us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember		 2us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember
Rate Forgiveness [Member] | Commercial Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts   2us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember		  
Rate Forgiveness [Member] | Consumer Installment [Member]      
Real estate- mortgage:      
Number of Contracts 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember		    
Rate Forgiveness [Member] | Commercial and Industrial [Member]      
Real estate- mortgage:      
Number of Contracts   6us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember		 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_RateForgivenessMember
Other Restructurings [Member] | Residential Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts 3us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember		   7us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember
Other Restructurings [Member] | Commercial Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember		   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember
Other Restructurings [Member] | Consumer Installment [Member]      
Real estate- mortgage:      
Number of Contracts     2us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember
Other Restructurings [Member] | Commercial and Industrial [Member]      
Real estate- mortgage:      
Number of Contracts   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember		 12us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= mbcn_OtherRestructuringsMember
Residential Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts 3us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember		 7us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember		 9us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
Pre-Modification Outstanding Recorded Investment (in Dollars) $ 140us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember		 $ 784us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember		 $ 921us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ResidentialRealEstateMortgageMember
Commercial Real Estate Mortgage [Member]      
Real estate- mortgage:      
Number of Contracts 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember		 2us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember		 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember
Pre-Modification Outstanding Recorded Investment (in Dollars) 48us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember		 834us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember		 156us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialRealEstateMortgageMember
Consumer Installment [Member]      
Real estate- mortgage:      
Number of Contracts 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember		   2us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember
Pre-Modification Outstanding Recorded Investment (in Dollars) 6us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember		   11us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_ConsumerInstallmentMember
Commercial and Industrial [Member]      
Real estate- mortgage:      
Number of Contracts   7us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember		 13us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember
Pre-Modification Outstanding Recorded Investment (in Dollars)   $ 1,264us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember		 $ 489us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mbcn_CommercialAndIndustrialMember