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Note 8 - Other Real Estate Owned ("OREO") | 3 Months Ended
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Mar. 31, 2016
Other Real Estate Owned OREO [Abstract] |
Other Real Estate Owned OREO [Text Block] | NOTE 8 – OTHER REAL ESTATE OWNED (“OREO”) OREO comprises foreclosed assets acquired in settlement of loans and is carried at fair value less estimated cost to sell and is included in other assets on the Consolidated Balance Sheet. At March 31, 2016 and December 31, 2015, there was $1.4 million of OREO. As of March 31, 2016, the Company has initiated formal foreclosure proceedings on $2.0 million of real estate.

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- Definition The entire disclosure of other real estate owned (OREO). + References No definition available. + Details
Name: | mbcn_OtherRealEstateOwnedOREOTextBlock
Namespace Prefix: | mbcn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | mbcn_OtherRealEstateOwnedOreoAbstract
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration