XML 117 R82.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 13 - Employee Benefits (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Maximum Matching Contribution [Member] | Retirement Plan [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 6.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / us-gaap_AwardTypeAxis = mbcn_MaximumMatchingContributionMember / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember |  |
Maximum [Member] | Stock Option and Restricted Stock Plan [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 10 years |  |
Retirement Plan [Member] | Middlefield Banking Company [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Defined Contribution Plan Annual Vesting Percentage | 20.00%mbcn_DefinedContributionPlanAnnualVestingPercentage / dei_LegalEntityAxis = mbcn_MiddlefieldBankingCompanyMember / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember |  |
Retirement Plan [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Requisite Service Period | 1 year |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 100.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 6 years |  |
Defined Benefit Plan, Contributions by Employer | $ 143,000 us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember | $ 155,000 us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember | $ 125,000 us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_PlanNameAxis = mbcn_RetirementPlanMember
Directors Retirement Plan [Member] | Middlefield Banking Company [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Requisite Service Period | 5 years |  |
Retirement Benefits Term | 10 years |  |
Postretirement Benefits Percentage of Compensation | 25.00%mbcn_PostretirementBenefitsPercentageOfCompensation / dei_LegalEntityAxis = mbcn_MiddlefieldBankingCompanyMember / us-gaap_PlanNameAxis = mbcn_DirectorsRetirementPlanMember |  |
Executive Deferred Compensation Plan [Member] | Middlefield Banking Company [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 115,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / dei_LegalEntityAxis = mbcn_MiddlefieldBankingCompanyMember / us-gaap_PlanNameAxis = mbcn_ExecutiveDeferredCompensationPlanMember | $ 120,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / dei_LegalEntityAxis = mbcn_MiddlefieldBankingCompanyMember / us-gaap_PlanNameAxis = mbcn_ExecutiveDeferredCompensationPlanMember | $ 139,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / dei_LegalEntityAxis = mbcn_MiddlefieldBankingCompanyMember / us-gaap_PlanNameAxis = mbcn_ExecutiveDeferredCompensationPlanMember
Stock Option and Restricted Stock Plan [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | 160,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = mbcn_StockOptionAndRestrictedStockPlanMember |  |
Omnibus Equity Plan [Member] |  |  |
Note 13 - Employee Benefits (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = mbcn_OmnibusEquityPlanMember | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = mbcn_OmnibusEquityPlanMember | 1,722 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = mbcn_OmnibusEquityPlanMember

X
- Definition Defined Contribution Plan Annual Vesting Percentage + References No definition available. + Details
Name: | mbcn_DefinedContributionPlanAnnualVestingPercentage
Namespace Prefix: | mbcn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | mbcn_Note13EmployeeBenefitsDetailsLineItems
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Postretirement benefits percentage of compensation. + References No definition available. + Details
Name: | mbcn_PostretirementBenefitsPercentageOfCompensation
Namespace Prefix: | mbcn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Retirement Benefits Term + References No definition available. + Details
Name: | mbcn_RetirementBenefitsTerm
Namespace Prefix: | mbcn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=mbcn_MaximumMatchingContributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=mbcn_DirectorsRetirementPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=mbcn_ExecutiveDeferredCompensationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=mbcn_OmnibusEquityPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=mbcn_RetirementPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=mbcn_StockOptionAndRestrictedStockPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |