<SEC-DOCUMENT>0001193125-23-300259.txt : 20231221
<SEC-HEADER>0001193125-23-300259.hdr.sgml : 20231221
<ACCEPTANCE-DATETIME>20231221060154
ACCESSION NUMBER:		0001193125-23-300259
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		12
CONFORMED PERIOD OF REPORT:	20231221
ITEM INFORMATION:		Other Events
FILED AS OF DATE:		20231221
DATE AS OF CHANGE:		20231221

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MIDDLEFIELD BANC CORP
		CENTRAL INDEX KEY:			0000836147
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				341585111
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36613
		FILM NUMBER:		231502718

	BUSINESS ADDRESS:	
		STREET 1:		15985 E HIGH ST
		STREET 2:		P O BOX 35
		CITY:			MIDDLEFILED
		STATE:			OH
		ZIP:			44062-9263
		BUSINESS PHONE:		4406321666

	MAIL ADDRESS:	
		STREET 1:		15985 EAST HIGH STREET
		STREET 2:		P O BOX 35
		CITY:			MIDDLEFIELD
		STATE:			OH
		ZIP:			44062-9263
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d441183d8k.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version="1.0" encoding="utf-8" ?>
<html xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:mbcn="http://middlefieldbank.bank/20231221" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>8-K</title>
<meta http-equiv="Content-Type" content="text/html" />
</head>
   <body><div style="display:none"> <ix:header> <ix:hidden> <ix:nonNumeric id="Hidden_dei_EntityRegistrantName" name="dei:EntityRegistrantName" contextRef="duration_2023-12-21_to_2023-12-21">MIDDLEFIELD BANC CORP</ix:nonNumeric> <ix:nonNumeric id="Hidden_dei_SecurityExchangeName" name="dei:SecurityExchangeName" contextRef="duration_2023-12-21_to_2023-12-21">NASDAQ</ix:nonNumeric> <ix:nonNumeric name="dei:AmendmentFlag" contextRef="duration_2023-12-21_to_2023-12-21">false</ix:nonNumeric> <ix:nonNumeric id="Hidden_dei_EntityCentralIndexKey" name="dei:EntityCentralIndexKey" contextRef="duration_2023-12-21_to_2023-12-21">0000836147</ix:nonNumeric> </ix:hidden> <ix:references> <link:schemaRef xlink:type="simple" xlink:href="mbcn-20231221.xsd" xlink:arcrole="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase"></link:schemaRef> </ix:references> <ix:resources> <xbrli:context id="duration_2023-12-21_to_2023-12-21"> <xbrli:entity> <xbrli:identifier scheme="http://www.sec.gov/CIK">0000836147</xbrli:identifier> </xbrli:entity> <xbrli:period> <xbrli:startDate>2023-12-21</xbrli:startDate> <xbrli:endDate>2023-12-21</xbrli:endDate> </xbrli:period> </xbrli:context> </ix:resources> </ix:header> </div> <div style="text-align:center"> <div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"> <p style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</p> <p style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</p> <p style="margin-top:8pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">UNITED STATES</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">SECURITIES AND EXCHANGE COMMISSION</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">WASHINGTON, DC 20549</p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">FORM <ix:nonNumeric name="dei:DocumentType" contextRef="duration_2023-12-21_to_2023-12-21">8-K</ix:nonNumeric></p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">CURRENT REPORT</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">PURSUANT TO SECTION 13 OR 15(d)</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">OF THE SECURITIES EXCHANGE ACT OF 1934</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:DocumentPeriodEndDate" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt:datemonthdayyearen">December&#160;21, 2023</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Date of Report: Date of earliest event reported)</p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman;font-weight:bold;text-align:center"> <span style=" -sec-ix-hidden:Hidden_dei_EntityRegistrantName">Middlefield Banc Corp.</span> </p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Exact name of registrant as specified in its charter)</p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityIncorporationStateCountryCode" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:stateprovnameen">Ohio</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(State or other jurisdiction of incorporation)</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityFileNumber" contextRef="duration_2023-12-21_to_2023-12-21">001-36613</ix:nonNumeric></span></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Commission File Number)</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityTaxIdentificationNumber" contextRef="duration_2023-12-21_to_2023-12-21">34-1585111</ix:nonNumeric></span></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(I.R.S. Employer Identification Number)</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressAddressLine1" contextRef="duration_2023-12-21_to_2023-12-21">15985 East High Street</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressCityOrTown" contextRef="duration_2023-12-21_to_2023-12-21">Middlefield</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressStateOrProvince" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:stateprovnameen">Ohio</ix:nonNumeric> <ix:nonNumeric name="dei:EntityAddressPostalZipCode" contextRef="duration_2023-12-21_to_2023-12-21">44062</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Address of principal executive offices, including zip code)</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(<ix:nonNumeric name="dei:CityAreaCode" contextRef="duration_2023-12-21_to_2023-12-21">440</ix:nonNumeric>) <span style="white-space:nowrap"><ix:nonNumeric name="dei:LocalPhoneNumber" contextRef="duration_2023-12-21_to_2023-12-21">632-1666</ix:nonNumeric></span></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Registrant&#8217;s telephone number, including area code)</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(not applicable)</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Former name or former address, if changed since last report)</p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box below if the Form <span style="white-space:nowrap">8-K</span> filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</p> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top"><ix:nonNumeric name="dei:WrittenCommunications" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top"><ix:nonNumeric name="dei:SolicitingMaterial" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Soliciting material pursuant to Rule <span style="white-space:nowrap">14a-12</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14a-12)</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top"><ix:nonNumeric name="dei:PreCommencementTenderOffer" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">14d-2(b)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14d-2(b))</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">13e-4(c)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.13e-4(c))</span></p></td></tr></table> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR &#167;230.405) or Rule <span style="white-space:nowrap">12b-2</span> of the Securities Exchange Act of 1934 (17 CFR <span style="white-space:nowrap">&#167;240.12b-2).</span></p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Emerging growth company&#160;&#160;<ix:nonNumeric name="dei:EntityEmergingGrowthCompany" contextRef="duration_2023-12-21_to_2023-12-21" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&#160;13(a) of the Exchange Act. &#160;&#160;&#9744;</p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Securities registered pursuant to Section&#160;12(b) of the Act:</p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="border-collapse:collapse; font-family:Times New Roman; font-size:8pt;width:100%;border:0;margin:0 auto">
<tr>
<td style="width:34%"></td>
<td style="vertical-align:bottom"></td>
<td style="width:32%"></td>
<td style="vertical-align:bottom;width:1%"></td>
<td style="width:32%"></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom;white-space:nowrap"> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Title of each class</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Trading</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Symbol(s)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Name of each exchange</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">on which registered</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style=" text-align: center;margin:auto; vertical-align:top"><ix:nonNumeric name="dei:Security12bTitle" contextRef="duration_2023-12-21_to_2023-12-21">Common Stock, no par value</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><ix:nonNumeric name="dei:TradingSymbol" contextRef="duration_2023-12-21_to_2023-12-21">MBCN</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:center"> <span style=" -sec-ix-hidden:Hidden_dei_SecurityExchangeName">The NASDAQ Stock Market, LLC</span> </p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman;text-align:center">(NASDAQ Capital Market)</p></td></tr></table> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <p style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</p> <p style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</p></div></div>

<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%" />

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">

<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top" align="left"><span style="font-weight:bold">Item&#160;8.01</span></td>
<td align="left" style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Other events. </p></td></tr></table> <p style="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">As previously disclosed on April&#160;21, 2023, Middlefield Banc Corp. (the &#8220;Company&#8221;) learned of a cyber-attack that resulted in a disruption to the computer systems of The Middlefield Banking Company (the &#8220;Bank&#8221;), the Company&#8217;s banking subsidiary. The Bank took immediate action to remediate the security vulnerability and retained a cybersecurity firm to investigate the nature and scope of the incident, evaluate our systems, identify solutions, and confirm what data had been impacted by this event, if any. The Bank also notified law enforcement. </p> <p style="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Our forensic review has determined that nonpublic information relating to current and former employees, customers and others was obtained from our systems during this incident. While the information varies by individual, some of the types of information that may have been obtained include name, Social Security number, driver&#8217;s license information, date of birth, financial account information, medical information, passport number, payment card information, and username and password. We have begun notifying all potentially impacted individuals in accordance with applicable law. The Bank is also notifying regulatory authorities in accordance with applicable law. We will offer complimentary identity protection services to all potentially impacted individuals. </p> <p style="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">The Company does not believe the incident will have a material adverse effect on its business, operations, or financial results. The Company remains subject to risks and uncertainties due to the incident, including potential litigation, changes in customer behavior, and additional regulatory scrutiny. </p> <p style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold"><span style="font-style:italic">Forward-Looking Information </span></p> <p style="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">This Form <span style="white-space:nowrap">8-K</span> contains certain statements that may be considered forward-looking statements within the meaning of Section&#160;27A of the Securities Act of 1933, as amended, and Section&#160;21E of the Securities Exchange Act of 1934, as amended, including the Company&#8217;s current expectations concerning the resolution of this cyber-attack and its impact on the Company&#8217;s business, operations or financial results. Such forward-looking statements include, but are not limited to, statements as to future results of operations and financial projections, express or implied statements relating to the Company&#8217;s expectations regarding its ability to contain and assess the cyber-attack and the impact of the cyber-attack on the Company&#8217;s business, operations and financial condition. Factors that could cause actual results to differ materially from those expressed or implied include the following: the ongoing assessment of the cyber-attack; legal, reputational and financial risks resulting from the cyber-attack or additional cyber-attacks; and the other factors set forth in the Company&#8217;s Annual Report on Form <span style="white-space:nowrap">10-K</span> for the year ended December&#160;31, 2022, and other public filings with the Securities and Exchange Commission. Forward-looking statements are based on currently available information and our current beliefs, expectations and understanding, which may change as our investigation and remediation efforts progress. Except as required by the federal securities laws, the Company undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. Forward-looking statements speak only as of the date they are made, and we do not undertake to update these statements other than as required by law and specifically disclaim any duty to do so. </p> <p style="font-size:18pt; margin-top:0pt; margin-bottom:0pt">&#160;</p>
</div></div>



<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%" />

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">
 <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">SIGNATURES </p> <p style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. </p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border:0">


<tr>

<td style="width:47%"></td>

<td style="vertical-align:bottom;width:1%"></td>
<td style="width:4%"></td>

<td style="vertical-align:bottom"></td>
<td></td>

<td style="vertical-align:bottom;width:1%"></td>
<td style="width:46%"></td></tr>


<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">MIDDLEFIELD BANC CORP.</td></tr>
<tr style="font-size:1pt">
<td style="height:12pt"></td>
<td style="height:12pt" colspan="2"></td>
<td style="height:12pt" colspan="2"></td>
<td style="height:12pt" colspan="2"></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom">Date: December&#160;21, 2023</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Ronald L. Zimmerly, Jr.</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">President</td></tr>
</table>
</div></div>

</body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>mbcn-20231221.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20231012.2 -->
<!-- Creation date: 12/21/2023 6:22:58 AM Eastern Time -->
<!-- Copyright (c) 2023 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema
  xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric"
  xmlns:num="http://www.xbrl.org/dtr/type/numeric"
  xmlns:us-types="http://fasb.org/us-types/2023"
  xmlns:mbcn="http://middlefieldbank.bank/20231221"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
  attributeFormDefault="unqualified"
  elementFormDefault="qualified"
  targetNamespace="http://middlefieldbank.bank/20231221"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
    <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
    <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" namespace="http://xbrl.sec.gov/dei/2023" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
    <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2023/naics-2023.xsd" namespace="http://xbrl.sec.gov/naics/2023" />
    <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mbcn-20231221_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="mbcn-20231221_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>3
<FILENAME>mbcn-20231221_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20231012.2 -->
<!-- Creation date: 12/21/2023 6:22:58 AM Eastern Time -->
<!-- Copyright (c) 2023 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Written Communications</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Soliciting Material</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Issuer Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Issuer Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security 12b Title</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security 12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>4
<FILENAME>mbcn-20231221_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20231012.2 -->
<!-- Creation date: 12/21/2023 6:22:58 AM Eastern Time -->
<!-- Copyright (c) 2023 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
    xmlns:link="http://www.xbrl.org/2003/linkbase"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
    xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="mbcn-20231221.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple" />
  <link:presentationLink xlink:type="extended" xlink:role="http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="22.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="23.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="24.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="25.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="27.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="28.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="29.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="30.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="31.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="32.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="33.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince" order="34.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="35.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="36.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="37.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_WrittenCommunications" order="38.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="39.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="40.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="41.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="42.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="43.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="44.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>5
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.23.4</span><table class="report" border="0" cellspacing="2" id="idm140524378261664">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Dec. 21, 2023</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">MIDDLEFIELD BANC CORP<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000836147<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Dec. 21,  2023<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation State Country Code</a></td>
<td class="text">OH<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-36613<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">34-1585111<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">15985 East High Street<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Middlefield<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">OH<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">44062<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">440<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">632-1666<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre Commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre Commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Common Stock, no par value<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">MBCN<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>6
<FILENAME>d441183d8k_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="mbcn-20231221.xsd" xlink:type="simple"/>
    <context id="duration_2023-12-21_to_2023-12-21">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000836147</identifier>
        </entity>
        <period>
            <startDate>2023-12-21</startDate>
            <endDate>2023-12-21</endDate>
        </period>
    </context>
    <dei:EntityRegistrantName
      contextRef="duration_2023-12-21_to_2023-12-21"
      id="Hidden_dei_EntityRegistrantName">MIDDLEFIELD BANC CORP</dei:EntityRegistrantName>
    <dei:SecurityExchangeName
      contextRef="duration_2023-12-21_to_2023-12-21"
      id="Hidden_dei_SecurityExchangeName">NASDAQ</dei:SecurityExchangeName>
    <dei:AmendmentFlag contextRef="duration_2023-12-21_to_2023-12-21">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2023-12-21_to_2023-12-21"
      id="Hidden_dei_EntityCentralIndexKey">0000836147</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2023-12-21_to_2023-12-21">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2023-12-21_to_2023-12-21">2023-12-21</dei:DocumentPeriodEndDate>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2023-12-21_to_2023-12-21">OH</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2023-12-21_to_2023-12-21">001-36613</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2023-12-21_to_2023-12-21">34-1585111</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2023-12-21_to_2023-12-21">15985 East High Street</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2023-12-21_to_2023-12-21">Middlefield</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2023-12-21_to_2023-12-21">OH</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2023-12-21_to_2023-12-21">44062</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2023-12-21_to_2023-12-21">440</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2023-12-21_to_2023-12-21">632-1666</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2023-12-21_to_2023-12-21">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2023-12-21_to_2023-12-21">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2023-12-21_to_2023-12-21">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2023-12-21_to_2023-12-21">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2023-12-21_to_2023-12-21">false</dei:EntityEmergingGrowthCompany>
    <dei:Security12bTitle contextRef="duration_2023-12-21_to_2023-12-21">Common Stock, no par value</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2023-12-21_to_2023-12-21">MBCN</dei:TradingSymbol>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>7
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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M?!^2!F.,6_0T7X\48JVFL:W&VC$,>8!8\PRA9CC?AT6:&C/5BZPYC0IO0=5
MY3_;U UH]@TT')$%7C&9MC:CY$X*/-S^[PVPPL2.X>V+OP%02P,$%     @
M.S"55T$OD@=#!   AA   !@   !X;"]W;W)K<VAE971S+W-H965T,2YX;6R-
MF%USZC80AO^*QIWI51);!AR2 C,$2,.<?-"0]LRTTPMA"]#$MEQ)#LF_[\H&
MFYZ:-;D(EM&^?KPKO9(8[*1ZUUO.#?E,XE0/G:TQV:WKZG#+$Z:O9,93^&8M
M5<(,--7&U9GB+"J"DMCU/2]P$R929S0H[BW4:"!S$XN4+Q31>9(P]77'8[D;
M.M0YW'@5FZVQ-]S1(&,;ON3F]VRAH.56*I%(>*J%3(GBZZ$SIK=W?M<&%#W^
M$'RGCZZ)?965E.^V,8^&CF>)>,Q#8R48?'SP"8]CJP0<_^Q%G>J9-O#X^J!^
M7[P\O,R*:3Z1\7<1F>W0Z3LDXFN6Q^95[A[X_H5Z5B^4L2[^DUW9M^LY),RU
MD<D^& @2D9:?['.?B*, __I$@+\/\ ON\D$%Y909-AHHN2/*]@8U>U&\:A$-
M<"*U55D:!=\*B#.CJ0QS2+(A+(W(+#7"?)%Y6E8;LC9P#3S$=G7#O>!=*>B?
M$N3A%?'I!?$]O_/?<!?8*D"_ O0+O<X)O8G\X(K\-5YIHZ"$?S<1E0K=9@4[
MKF]UQD(^=&#@:JX^N#/Z^2<:>+\@?)V*KX.IC_8Y>^4;80DAD\\LX4V4N,[3
M?#I]G-W/9X]3<C=^GI#)R^L"X>M6?%U4=\G#7%G"V6>X9>F&G^3#=9['R^GX
M-P2H5P'U4*$Q#+>H&'+W,=LT@>#Q:Q9KCG $%4=P3N$F0*)8#(,^XI_D&_]J
M(L*5//CK=P+:O4:PKBNL:U2LFI!O7UECF?#P_N4W!*)?0?3/@UAP):0UAHB
MO33RM"@=[*#-#VXJM)MSRC9/0ZDRJ0J7(DL#<&0B<Z@EE%1&C:2X\,L#0D>]
MVD^]<_CN10PS+4]67#5Z*"[B>?2R$P042Q@]LGAZ#M(;^R3S"*HJUB(L\X8
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MJ#(9BBJ6<%H@XLD@;6E6?;!/3K3G>1<W]T6NS>,)KM\,<'AT_@%02P,$%
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M?^:+X3]>?P%02P$"% ,4    "  [,)57!T%-8H$   "Q    $
M    @ $     9&]C4')O<',O87!P+GAM;%!+ 0(4 Q0    ( #LPE5>/BNTH
M[0   "L"   1              "  :\   !D;V-0<F]P<R]C;W)E+GAM;%!+
M 0(4 Q0    ( #LPE5>97)PC$ 8  )PG   3              "  <L!  !X
M;"]T:&5M92]T:&5M93$N>&UL4$L! A0#%     @ .S"55T$OD@=#!   AA
M !@              ("!# @  'AL+W=O<FMS:&5E=',O<VAE970Q+GAM;%!+
M 0(4 Q0    ( #LPE5>?H!OPL0(  .(,   -              "  84,  !X
M;"]S='EL97,N>&UL4$L! A0#%     @ .S"55Y>*NQS     $P(   L
M         ( !80\  %]R96QS+RYR96QS4$L! A0#%     @ .S"55QPX9>H_
M 0  / (   \              ( !2A   'AL+W=O<FMB;V]K+GAM;%!+ 0(4
M Q0    ( #LPE5<D'INBK0   /@!   :              "  ;81  !X;"]?
M<F5L<R]W;W)K8F]O:RYX;6PN<F5L<U!+ 0(4 Q0    ( #LPE5=ED'F2&0$
M ,\#   3              "  9L2  !;0V]N=&5N=%]4>7!E<UTN>&UL4$L%
3!@     )  D /@(  .43      $!

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
..report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

..report table.authRefData a {
	display: block;
	font-weight: bold;
}

..report table.authRefData p {
	margin-top: 0px;
}

..report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

..report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

..report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

..report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
..pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
..report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

..report hr {
	border: 1px solid #acf;
}

/* Top labels */
..report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

..report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

..report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

..report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

..report td.pl div.a {
	width: 200px;
}

..report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
..report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
..report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
..report .re, .report .reu {
	background-color: #def;
}

..report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
..report .ro, .report .rou {
	background-color: white;
}

..report .rou td {
	border-bottom: 1px solid black;
}

..report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
..report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
..report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

..report .nump {
	padding-left: 2em;
}

..report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
..report .text {
	text-align: left;
	white-space: normal;
}

..report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

..report .text .more {
	display: none;
}

..report .text .note {
	font-style: italic;
	font-weight: bold;
}

..report .text .small {
	width: 10em;
}

..report sup {
	font-style: italic;
}

..report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>22</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="d441183d8k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" isOnlyDei="true" original="d441183d8k.htm">d441183d8k.htm</File>
    <File>mbcn-20231221.xsd</File>
    <File>mbcn-20231221_lab.xml</File>
    <File>mbcn-20231221_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="22">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>13
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "d441183d8k.htm": {
   "nsprefix": "mbcn",
   "nsuri": "http://middlefieldbank.bank/20231221",
   "dts": {
    "inline": {
     "local": [
      "d441183d8k.htm"
     ]
    },
    "schema": {
     "local": [
      "mbcn-20231221.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "https://www.xbrl.org/dtr/type/2022-03-31/types.xsd",
      "https://xbrl.sec.gov/dei/2023/dei-2023.xsd",
      "https://xbrl.sec.gov/naics/2023/naics-2023.xsd"
     ]
    },
    "labelLink": {
     "local": [
      "mbcn-20231221_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "mbcn-20231221_pre.xml"
     ]
    }
   },
   "keyStandard": 22,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 4,
    "http://xbrl.sec.gov/dei/2023": 4
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 23,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2023": 22
   },
   "report": {
    "R1": {
     "role": "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation",
     "longName": "100000 - Document - Document and Entity Information",
     "shortName": "Document and Entity Information",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "duration_2023-12-21_to_2023-12-21",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d441183d8k.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "duration_2023-12-21_to_2023-12-21",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d441183d8k.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine1": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityAddressPostalZipCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code",
        "documentation": "Code for the postal or zip code"
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Issuer Tender Offer",
        "terseLabel": "Pre Commencement Issuer Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "dei_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company",
        "documentation": "Indicate if registrant meets the emerging growth company criteria."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "dei_SolicitingMaterial": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "dei_EntityTaxIdentificationNumber": {
     "xbrltype": "employerIdItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number",
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "TradingSymbol",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol",
        "documentation": "Trading symbol of an instrument as listed on an exchange."
       }
      }
     },
     "auth_ref": []
    },
    "dei_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number",
        "documentation": "Local phone number for entity."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CityAreaCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "CityAreaCode",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "City Area Code",
        "terseLabel": "City Area Code",
        "documentation": "Area code of city"
       }
      }
     },
     "auth_ref": []
    },
    "dei_WrittenCommunications": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Written Communications",
        "terseLabel": "Written Communications",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act."
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town",
        "documentation": "Name of the City or Town"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityFileNumber": {
     "xbrltype": "fileNumberItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity File Number",
        "terseLabel": "Entity File Number",
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CoverAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Cover [Abstract]",
        "terseLabel": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Tender Offer",
        "terseLabel": "Pre Commencement Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentType",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "terseLabel": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityIncorporationStateCountryCode": {
     "xbrltype": "edgarStateCountryItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Incorporation State Country Code",
        "terseLabel": "Entity Incorporation State Country Code",
        "documentation": "Two-character EDGAR code representing the state or country of incorporation."
       }
      }
     },
     "auth_ref": []
    },
    "dei_SecurityExchangeName": {
     "xbrltype": "edgarExchangeCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name",
        "documentation": "Name of the Exchange on which a security is registered."
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "dei_EntityAddressStateOrProvince": {
     "xbrltype": "stateOrProvinceItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressStateOrProvince",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province",
        "documentation": "Name of the state or province."
       }
      }
     },
     "auth_ref": []
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "Security12bTitle",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security 12b Title",
        "terseLabel": "Security 12b Title",
        "documentation": "Title of a 12(b) registered security."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://middlefieldbank.bank//20231221/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Section": "14a",
   "Number": "240",
   "Subsection": "12"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>14
<FILENAME>0001193125-23-300259-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001193125-23-300259-xbrl.zip
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MKD!KW)$KT:A9']>@$/5(!CRNZFM!7P\09K]]ZEZGW8/E_=.NE4!23PV%'-,
MA 9G.BA5:Z7:86:2$HA$;J)81)Z:YZA43VD)B_-UJ,Y1$5N=.=&,.A]63&/4
M=;6PH)@7M+PSZN#_ 0]<=GY4^N6T8G["NS$+*,$92NR_(9^<%=K""Y@7E/H@
MH05BFZ>S0L >@XJ>D51P7"6:E!!R.A#.[/S4X1.B@IG+S@H.5[Y+9Z@%K'!.
M3OEC$[LS&?T&Z6.>^0U=;HP*$.Z<%3[KIM]!^W[O> #DK,ONN4+R!C=T# !Y
M\"\LP'AS>;L&^#'HLB'T"J7FQ^\HV24+^&K]'HC,4^'\R]7%Q77G\JIS?4$^
MM6[:I'W;O3NMY !["M >LT,)H'0>[1'U[MD\H,O;MP3TIM6[:/W[*<C215MC
MYCGP-[ATZ?W6JPVIJ]B69##\:,.2DKI7GL,>?V&S188M=-@2M"K\.:H?6HV/
MB_!5YH1+LB&3X .8@F<TB$VEC1:L1;0M;:(=/BLH/O9=U#W];B01%+27I=@D
MEA^5$S=3:4N!4KZQZ7T%HWY^6LGC$V&?PU@_*Q%*\ZAM4#,BM^;>!N2.AS'-
MO.21._@"'(@D&@2VU$*VKW[),VQ^,$*]='X?."J<Y!&,HPPN:,#.4]CBD6E;
M"JNSHF_<DBR;K%/)42>A9DJ]2M:(5<#8P7\9DX>C2M3E]U[3!ER8+.3;I]P)
M1LVC\@'W3C)]P0D')V,J[[E7PM]-0L- Q&\DOQ]%KW Z/YX,_4YIQ'0KQ#E^
M,D4@_&;F<2""0(SUFX&0 'K\QO(?B1(N=\A/5?VG</Z/GZS#ZLEIQ5^U4/WI
MA6K/7B@S[1%,0A81($-@34GQ/UG3.DJ>AW3,W5FSS\=,D1LV)5TQIMZ);IL:
MN ?"=4Z6L.?KS56_<T%Z_5:_TUL-3O6-P.EUVE^[5_VK3H^T;BY(Y[?VY];-
MSQUP2%^^7/5Z5[<W+X*QM@L8?VWU/E_=_-R_O2F2BS:I50\:QW-0S2WYE%SF
MQ>$I?5HJEX?/DLMR%;KE1?/$Z&C-^K"(^X8ZFB(3FXAE[#+,> .9NKSM?ED=
M(EP(.\0((1/I;>Z&=129][_?)>%5)&$GF@NVI=NYZ9-NY^ZVVW]_2W+WM=O[
MV@* ^K<$+%\?S!NQZN2V2ZR#/6?__0&\O23]SQV2L<J)16ZU^P2:K>-Z8S6<
M;\;9)]7[3H<X'1/Y;*OGQ&QJSPJP$6XZ,,$8AH\<.ILQ"G%FX?R"V6P\8-+(
M>\TJ$AS]A&EX!W[N(?9$#$F7^4*"FL;/@(?+F0H(FT!7(G4S6Q#![]9L)]:L
MUM@%,\FI\JD70T P0U/BCR6S]6L^E4,X_Y)FO\@GZMFD+:1?/JW@I!C<OT!6
MJSN1U<XCM0.MRBBA,@&?4$64SVS<.SF$>X0'BM@CV/\P^5U@7\?][H2C*XVT
M$= KSP8)%,88]P*P3&T1>H&<M87S(I.-FH$;Y(#Y4DQP6;39MR,N=FFA=Q*K
M[FF\B9!$!",FR1^AY,KA-B*+6L"S-%H3(+P=3[,V:#KB 2O!&YL!5:>2^D\R
M_9*[#-K =SXC!V:5ZH>'UA(_JVW8^S.S+<9CKO DAB">Q"#Z=V!;GSY>1?DK
M6_/IF3RL-TK6P=&!95G?+!.ORMURKTPZ8]\5,U#)/-[?$D_7LZSE.)(I%?UW
M#2[+VII=UL'QT0'I4 @4/P,LI!=(QH*=QKEO2(HV_+R5?3'UMC\Q28.G>>R+
MJW,-N=6UI;^5=^"2N#[S>@L'MR%L=P)F<__#_>>XWO-&HWI8^_9<:X0;NE%?
M LFY3UW"'ID=!GR",2;H-%-%]+%NB.?EY$_N ^X.^Q:T>V\EYU",6Y+1Y_)J
MGE/[Y/G>X5K8U+T;">^Y3OVP7BM9AX>'WZP[2+=1__CIJ&9]/%$D8"[S$6?B
M::2S(D2!,=^.#'D"=D^^[X+S&KCK0'HK:EZ"$0.?:C9Y4MLT>*1&4X&.0V).
MBQVBT$@2%UV/R4Y\W^J]SU:O<-X>,?N!P/X$94D*,*:X9QF(1S)@KI@BU[ 1
M>?NT*=$I=)-S&'(7588KT)^ >0YP/1# ^''H!M1C(E3NC"BP(&HXTRM$ \0
MZ$7C+1(V9)(%(<P#$N7-XK:A< %('(?.DF-TKIHK9>EP6U'""A-4KGBJB/LV
MK$I]Q9KQC_7*,\\0,TLSEA2K6OT II6YK@^ZHDN[JN89B1L]&UAD#(A/[UEI
M .;H :N5N,.:="*X$W5S\D>TC0\G$R8#L!-N)(V _1J[_ZOD ; ,-SRA%X7&
MZL4AS4 (=T"!70$(%U+Y^&.C<;+H&@)G#HEEL&?82_(<)2\VOG-GV87SB!Y
M@"Q!B!]*%:)4@EQW0Q"21NT@DE 4S:A&AL/<+3L@>]9'TK[LDEJ]6H:.^T:[
M 5GX1^(_*&??Q?8%8ML#*VP#P;W[+V#"P(ZY_\<RFQ(#IC;46!38)^VYU:!
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M QLO2"6^RAC+ 8.-$!A+=TIGJF#$ 2_&)X85XFPAFS\=ZS\G,4+^8R[I5HF
M6']DOMM;GS_^L)!6_'3;O>AT2^W;Z^O67:_3C']\VVE%RUJ:5R3Z)PC28L)L
MWG_"7CI@8R,=1^6JE:0W4I.7G>R]LH#KW+[!\E9GJ_1]$U4FVZ31#E<88+T$
M][ ^LWG\8<OM<@MW^&S"396!PY7M"LP*@!-N^9*[^:L]1;+\^@39P^TS5@;5
MJB?M. 4$3];)/G$9E9AI@_B+$GLV /VG04!U+07%LA85NH')Q%&$0(:^SF+
M5AUGQ0Q&&.!=\QG$2&-=R(96?PZ2!TQ;1$OGP,&V&):BGC$#H"YD&D2C53@
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M'BC2L3Z',<*1'V]U-CSORT^4RNBRJ"5V7.S1A\6BPV+ &:CBQ6/P&S8F%#
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M(FI3 WAT &/AS&Y[>1<1;IJ\&\BW+%A+[7>^"1:Z>-8$9/O8CD"N+ 3+8UQ
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MO^/I__(\A]I2D4X1/E0:U@AVA[M2F)9T;06[7K3<MUJ*I0F>40]%2YR&H2Y
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MK9F$23O(QBD/733KZ<>!"?2Y2B"]GIL_AZ+9G$& HIT^S:4Y?[C.:_=-04$
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M-"5? 5!+ 0(4 Q0    ( #LPE5?^XL%&'Q(  ,-@   .              "
M 0    !D-#0Q,3@S9#AK+FAT;5!+ 0(4 Q0    ( #LPE5<T^-JC/@,  %D+
M   1              "  4L2  !M8F-N+3(P,C,Q,C(Q+GAS9%!+ 0(4 Q0
M   ( #LPE5>LXCO]7P8  +]#   5              "  ;@5  !M8F-N+3(P
M,C,Q,C(Q7VQA8BYX;6Q02P$"% ,4    "  [,)57XGX_7, $  "%*@  %0
M            @ %*'   ;6)C;BTR,#(S,3(R,5]P<F4N>&UL4$L%!@     $
-  0  0$  #TA      $!

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
