XML 63 R50.htm IDEA: XBRL DOCUMENT v3.25.2

Note 7 - Loans and Related Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2025

Jun. 30, 2024

Jun. 30, 2025

Jun. 30, 2024

Dec. 31, 2024

Beginning balance

$ 22,401

$ 21,069

$ 22,447

^[1],[2]

$ 21,693

$ 21,693

Charge-offs

(18)

(6)

(72)

(13)

Recoveries

36

35

299

110

Provision

(84)

697

(339)

5

Ending balance

22,335

^[1],[2]

21,795

22,335

^[1],[2]

21,795

22,447

^[1],[2]

Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member]

Beginning balance

2,288

2,060

2,100

2,668

2,668

Charge-offs

0

0

0

0

(45)

Recoveries

0

0

13

11

Provision

250

(2)

425

(621)

Ending balance

2,538

2,058

2,538

2,058

2,100

Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member]

Beginning balance

5,098

7,768

8,364

4,480

4,480

Charge-offs

(18)

0

(18)

0

(1,341)

Recoveries

0

0

7

0

Provision

(452)

213

(3,725)

3,501

Ending balance

4,628

7,981

4,628

7,981

8,364

Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member]

Beginning balance

1,168

1,204

1,310

1,796

1,796

Charge-offs

0

0

0

0

0

Recoveries

0

0

0

0

Provision

(111)

64

(253)

(528)

Ending balance

1,057

1,268

1,057

1,268

1,310

Residential Portfolio Segment [Member]

Beginning balance

5,650

4,774

5,236

5,450

5,450

Charge-offs

0

0

(1)

0

0

Recoveries

0

0

36

0

Provision

151

117

530

(559)

Ending balance

5,801

4,891

5,801

4,891

5,236

Commercial And Industrial [Member]

Beginning balance

2,971

2,038

2,427

4,377

4,377

Charge-offs

0

0

(5)

0

(215)

Recoveries

1

8

170

16

Provision

42

384

422

(1,963)

Ending balance

3,014

2,430

3,014

2,430

2,427

Home Equity Lines of Credit [Member]

Beginning balance

920

785

897

750

750

Charge-offs

0

0

(4)

(7)

(7)

Recoveries

0

0

8

0

Provision

68

28

87

70

Ending balance

988

813

988

813

897

Construction and Other [Member]

Beginning balance

4,233

2,373

2,052

1,990

1,990

Charge-offs

0

0

0

0

0

Recoveries

0

0

0

0

Provision

1

(83)

2,182

300

Ending balance

4,234

2,290

4,234

2,290

2,052

Consumer Portfolio Segment [Member]

Beginning balance

73

67

61

182

182

Charge-offs

0

(6)

(44)

(6)

(38)

Recoveries

35

27

65

83

Provision

(33)

(24)

(7)

(195)

Ending balance

$ 75

$ 64

$ 75

$ 64

$ 61

[1]	Accrued interest of $5.5 million and $5.5 million at June 30, 2025 and December 31, 2024, respectively, is excluded from amortized cost and presented in "accrued interest receivable and other assets" on the Consolidated Balance Sheets.
[2]	Unearned income, including net deferred loan fees and costs and unamortized premiums and discounts, totaled $7.1 million and $8.2 million at June 30, 2025 and December 31, 2024, respectively.

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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: