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Note 10 - Risks and Uncertainties - Summary of Payment Deferrals (Details) $ in Thousands | Jun. 30, 2020 USD ($)
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Number of Loans | 362
Balance | $ 214,800
Commercial Portfolio Segment [Member] |
Number of Loans | 362
Balance | $ 214,817
% of Total Loans | 19.40%
Commercial Portfolio Segment [Member] | Retail Loan [Member] |
Number of Loans | 58
Balance | $ 89,438
% of Total Loans | 8.10%
Commercial Portfolio Segment [Member] | Hospitality and Tourism Loan [Member] |
Number of Loans | 23
Balance | $ 35,700
% of Total Loans | 3.20%
Commercial Portfolio Segment [Member] | Ambulatory Care, Nursing/Rehabilitation and Social Assistance [Member] |
Number of Loans | 10
Balance | $ 22,456
% of Total Loans | 2.00%
Commercial Portfolio Segment [Member] | Multifamily and Residential NOO [Member] |
Number of Loans | 16
Balance | $ 7,628
% of Total Loans | 0.70%
Commercial Portfolio Segment [Member] | Restaurant/food service/bar Loan [Member] |
Number of Loans | 10
Balance | $ 5,216
% of Total Loans | 0.50%
Commercial Portfolio Segment [Member] | Other Loans [Member] |
Number of Loans | 245
Balance | $ 54,379
% of Total Loans | 4.90%

X
- Definition The number of principal and interest payments and extension of maturity date payment deferrals on financing receivable. + References No definition available. + Details
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Namespace Prefix: | mbcn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of principal and interest payment and extension of maturity date payment deferrals on financing receivable. + References No definition available. + Details
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Namespace Prefix: | mbcn_
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Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of total loans of principal and interest payments and extension of maturity date payment deferrals on financing receivable. + References No definition available. + Details
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X
- Details
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X
- Details
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Data Type: | na
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X
- Details
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X
- Details
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Data Type: | na
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X
- Details
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- Details
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- Details
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