XML 109 R77.htm IDEA: XBRL DOCUMENT
v3.22.4

Note 9 - Deposits - Scheduled Maturities of Time Deposits that Meet or Exceed FDIC Insurance Limit (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Within three months, amount | $ 9,807 |
Within three months, percent | 19.26% |
Beyond three but within six months, amount | $ 5,094 |
Beyond three but within six months, percent | 10.00% |
Beyond six but within twelve months, amount | $ 11,166 |
Beyond six but within twelve months, percent | 21.93% |
Beyond one year, amount | $ 24,850 |
Beyond one year, percent | 48.81% |
Total, amount | $ 50,917 | $ 33,400
Total, percent | 100.00% |

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing after twelve months from the balance sheet date. + References No definition available. + Details
Name: | mbcn_ContractualMaturitiesTimeDeposits250000OrMoreAfter12Months
Namespace Prefix: | mbcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing within six to twelve months after the balance sheet date. + References No definition available. + Details
Name: | mbcn_ContractualMaturitiesTimeDeposits250000OrMoreSixMonthsThrough12Months
Namespace Prefix: | mbcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing within three months or fewer from the balance sheet date. + References No definition available. + Details
Name: | mbcn_ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsOrLess
Namespace Prefix: | mbcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing within three to six months after the balance sheet date. + References No definition available. + Details
Name: | mbcn_ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsThroughSixMonths
Namespace Prefix: | mbcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percent of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more. + References No definition available. + Details
Name: | mbcn_PercentOfTimeDeposits250000OrMore
Namespace Prefix: | mbcn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing after twelve months from the balance sheet date. + References No definition available. + Details
Name: | mbcn_PercentOfTimeDeposits250000OrMoreAfter12Months
Namespace Prefix: | mbcn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more, maturing within six to twelve months after the balance sheet date. + References No definition available. + Details
Name: | mbcn_PercentOfTimeDeposits250000OrMoreSixMonthsThrough12Months
Namespace Prefix: | mbcn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing within three months or fewer from the balance sheet date. + References No definition available. + Details
Name: | mbcn_PercentOfTimeDeposits250000OrMoreThreeMonthsOrLess
Namespace Prefix: | mbcn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more, maturing within three to six months after the balance sheet date. + References No definition available. + Details
Name: | mbcn_PercentOfTimeDeposits250000OrMoreThreeMonthsThroughSixMonths
Namespace Prefix: | mbcn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818 + Details
Name: | us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant