XML 87 R66.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Past Due Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loans and Leases Receivable, Net of Deferred Income, Total | $ 981,691 | $ 1,104,085
Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 977,994 | 1,095,570
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,276 | 5,121
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 190 | 1,795
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,231 | 1,599
Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 3,697 | 8,515
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 111,470 | 103,121
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 111,257 | 102,587
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 81 | 418
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 132 | 0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 116
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 213 | 534
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 283,618 | 309,424
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 282,365 | 305,613
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 880 | 1,844
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 1,373
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 373 | 594
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,253 | 3,811
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 31,189 | 39,562
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 31,189 | 39,562
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Residential Portfolio Segment [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 240,089 | 233,995
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 238,483 | 230,996
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,187 | 2,364
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 95
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 419 | 540
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,606 | 2,999
Commercial And Industrial [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 148,812 | 232,044
Commercial And Industrial [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 148,437 | 231,534
Commercial And Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 112 | 260
Commercial And Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 219
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 263 | 31
Commercial And Industrial [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 375 | 510
Home Equity Lines of Credit [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 104,355 | 112,543
Home Equity Lines of Credit [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 104,316 | 112,325
Home Equity Lines of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 120
Home Equity Lines of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 39 | 0
Home Equity Lines of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 98
Home Equity Lines of Credit [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 39 | 218
Construction and Other [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 54,148 | 63,573
Construction and Other [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 54,148 | 63,529
Construction and Other [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 44
Construction and Other [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Construction and Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 0
Construction and Other [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 44
Consumer Portfolio Segment [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 8,010 | 9,823
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,799 | 9,424
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 16 | 71
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 19 | 108
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 176 | 220
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 211 | $ 399

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mbcn_OwnerOccupiedLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mbcn_NonownerOccupiedLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mbcn_MultifamilyLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_HomeEquityLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_ConstructionAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |