XML 111 R49.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 2 - Earnings Per Share (Details) - Shares Used in Calculation of Earnings Per Share | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Shares Used in Calculation of Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding |  |  |  |  |  |  |  |  | 2,231,165 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 2,206,392 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 2,101,490 us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Average treasury stock shares |  |  |  |  |  |  |  |  | (189,530)us-gaap_WeightedAverageNumberOfSharesTreasuryStock | (189,530)us-gaap_WeightedAverageNumberOfSharesTreasuryStock | (189,530)us-gaap_WeightedAverageNumberOfSharesTreasuryStock
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share | 2,049,536 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,044,124 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,038,026 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,033,480 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,027,680 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,022,490 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,017,264 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,999,645 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,041,635 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,016,862 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,911,960 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Additional common stock equivalents used to calculate diluted earnings per share |  |  |  |  |  |  |  |  | 7,871 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 7,178 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 4,972 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share | 2,059,561 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,052,012 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,044,564 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,039,515 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,032,611 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,029,420 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,023,961 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,010,292 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,049,506 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,024,040 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,916,932 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

X
- Details
Name: | mbcn_SharesUsedInCalculationOfEarningsPerShareAbstract
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
Name: | us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of treasury stock determined by relating the portion of time within a reporting period that treasury shares have been outstanding to the total time in that period. Treasury stock is stock that the Entity has issued but subsequently reacquired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesTreasuryStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration