<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>246</ContextCount>
  <ElementCount>234</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>43</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Statements of Condition (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-condition-current-period-unaudited-</Role>
      <ShortName>Consolidated Statements of Condition (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Statements of Condition (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-condition-current-period-unaudited-parentheticals</Role>
      <ShortName>Consolidated Statements of Condition (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-income-unaudited-</Role>
      <ShortName>Consolidated Statements of Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-comprehensive-income-loss-unaudited</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-changes-in-shareholders-equity-unaudited-</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-changes-in-shareholders-equity-unaudited-parentheticals</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Statement - Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 1 - Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation</Role>
      <ShortName>Note 1 - Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 2 - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-2-earnings-per-share</Role>
      <ShortName>Note 2 - Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 3 - Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-3-statements-of-cash-flows</Role>
      <ShortName>Note 3 - Statements of Cash Flows</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 4 - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-</Role>
      <ShortName>Note 4 - Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 5 - Loans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans</Role>
      <ShortName>Note 5 - Loans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 6 - Allowance for Loan Losses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-6-allowance-for-loan-losses</Role>
      <ShortName>Note 6 - Allowance for Loan Losses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 7 - Deposits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-7-deposits</Role>
      <ShortName>Note 7 - Deposits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 8 - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-8-shareholders-equity-</Role>
      <ShortName>Note 8 - Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 9 - Fair Value Measurements and Disclosures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 10 - Acquisition of Corporate Trust Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-10-acquisition-of-corporate-trust-business</Role>
      <ShortName>Note 10 - Acquisition of Corporate Trust Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 1 - Basis of Presentation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation-tables</Role>
      <ShortName>Note 1 - Basis of Presentation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 4 - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-tables</Role>
      <ShortName>Note 4 - Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 5 - Loans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-tables</Role>
      <ShortName>Note 5 - Loans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-5-loans</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 6 - Allowance for Loan Losses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-6-allowance-for-loan-losses-tables</Role>
      <ShortName>Note 6 - Allowance for Loan Losses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-6-allowance-for-loan-losses</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 9 - Fair Value Measurements and Disclosures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-tables</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Note 1 - Basis of Presentation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation-details-textual</Role>
      <ShortName>Note 1 - Basis of Presentation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation-tables</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 1 - Basis of Presentation - Revised Consolidated Financial Statements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-1-basis-of-presentation-revised-consolidated-financial-statements-details</Role>
      <ShortName>Note 1 - Basis of Presentation - Revised Consolidated Financial Statements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 2 - Earnings Per Share (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-2-earnings-per-share-details-textual</Role>
      <ShortName>Note 2 - Earnings Per Share (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-2-earnings-per-share</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 3 - Statements of Cash Flows (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-3-statements-of-cash-flows-details-textual</Role>
      <ShortName>Note 3 - Statements of Cash Flows (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-3-statements-of-cash-flows</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Note 4 - Investments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-details-textual</Role>
      <ShortName>Note 4 - Investments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-tables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 4 - Investments - Amortized Cost and Fair Value Of Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-amortized-cost-and-fair-value-of-securities-details</Role>
      <ShortName>Note 4 - Investments - Amortized Cost and Fair Value Of Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 4 - Investments - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-amortized-cost-and-fair-value-of-debt-securities-by-contractual-maturity-details</Role>
      <ShortName>Note 4 - Investments - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 4 - Investments - Available for Sale and Held to Maturity Securities with Gross Unrealized Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-4-investments-available-for-sale-and-held-to-maturity-securities-with-gross-unrealized-losses-details</Role>
      <ShortName>Note 4 - Investments - Available for Sale and Held to Maturity Securities with Gross Unrealized Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure - Note 5 - Loans (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-details-textual</Role>
      <ShortName>Note 5 - Loans (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-tables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Note 5 - Loans - Composition of Loan Portfolio (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-composition-of-loan-portfolio-details</Role>
      <ShortName>Note 5 - Loans - Composition of Loan Portfolio (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>034 - Disclosure - Note 5 - Loans - Age Analysis of the Loan Portfolio, Segregated by Class of Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-age-analysis-of-the-loan-portfolio-segregated-by-class-of-loans-details</Role>
      <ShortName>Note 5 - Loans - Age Analysis of the Loan Portfolio, Segregated by Class of Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>035 - Disclosure - Note 5 - Loans - Analysis of Loan Portfolio by Loan Grade, Segregated by Class of Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-analysis-of-loan-portfolio-by-loan-grade-segregated-by-class-of-loans-details</Role>
      <ShortName>Note 5 - Loans - Analysis of Loan Portfolio by Loan Grade, Segregated by Class of Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>036 - Disclosure - Note 5 - Loans - Total Loans on Nonaccrual (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-total-loans-on-nonaccrual-details</Role>
      <ShortName>Note 5 - Loans - Total Loans on Nonaccrual (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>037 - Disclosure - Note 5 - Loans - Impaired Loans, Segregated by Class of Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-5-loans-impaired-loans-segregated-by-class-of-loans-details</Role>
      <ShortName>Note 5 - Loans - Impaired Loans, Segregated by Class of Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>038 - Disclosure - Note 6 - Allowance for Loan Losses - Allowance for Loan Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-6-allowance-for-loan-losses-allowance-for-loan-losses-details</Role>
      <ShortName>Note 6 - Allowance for Loan Losses - Allowance for Loan Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>039 - Disclosure - Note 7 - Deposits (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-7-deposits-details-textual</Role>
      <ShortName>Note 7 - Deposits (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-7-deposits</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>040 - Disclosure - Note 8 - Shareholders' Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-8-shareholders-equity-details-textual</Role>
      <ShortName>Note 8 - Shareholders' Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-8-shareholders-equity-</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>041 - Disclosure - Note 9 - Fair Value Measurements and Disclosures (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-details-textual</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-tables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>042 - Disclosure - Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-assets-measured-at-fair-value-on-recurring-basis-details</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>043 - Disclosure - Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Impairment Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-assets-measured-at-fair-value-on-nonrecurring-basis-of-impairment-loans-details</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Impairment Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>044 - Disclosure - Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Other Real Estate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-assets-measured-at-fair-value-on-nonrecurring-basis-of-other-real-estate-details</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Other Real Estate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>045 - Disclosure - Note 9 - Fair Value Measurements and Disclosures - Change in Fair Value of Other Real Estate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-change-in-fair-value-of-other-real-estate-details</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures - Change in Fair Value of Other Real Estate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>046 - Disclosure - Note 9 - Fair Value Measurements and Disclosures - Carrying Value and Estimated Fair Value of Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-9-fair-value-measurements-and-disclosures-carrying-value-and-estimated-fair-value-of-financial-instruments-details</Role>
      <ShortName>Note 9 - Fair Value Measurements and Disclosures - Carrying Value and Estimated Fair Value of Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="pfbx20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>047 - Disclosure - Note 10 - Acquisition of Corporate Trust Business (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://peoplesfinancial.net/20220331/role/statement-note-10-acquisition-of-corporate-trust-business-details-textual</Role>
      <ShortName>Note 10 - Acquisition of Corporate Trust Business (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://peoplesfinancial.net/20220331/role/statement-note-10-acquisition-of-corporate-trust-business</ParentRole>
      <Position>48</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="10-Q" original="pfbx20220331_10q.htm">pfbx20220331_10q.htm</File>
    <File>ex_372090.htm</File>
    <File>ex_372091.htm</File>
    <File>ex_372092.htm</File>
    <File>ex_372093.htm</File>
    <File>pfbx-20220331.xsd</File>
    <File>pfbx-20220331_cal.xml</File>
    <File>pfbx-20220331_def.xml</File>
    <File>pfbx-20220331_lab.xml</File>
    <File>pfbx-20220331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2022</BaseTaxonomy>
    <BaseTaxonomy items="878">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="26">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
