<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>171</ContextCount>
  <ElementCount>297</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>50</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="ppih20250731_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://investors.permapipe.com/20250731/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-statements-of-operations-unaudited</Role>
      <ShortName>Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Statements of Comprehensive Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-statements-of-comprehensive-income-unaudited</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-balance-sheets-current-period-unaudited</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-statements-of-stockholders-equity-unaudited</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 1 - Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-1-basis-of-presentation</Role>
      <ShortName>Note 1 - Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 2 - Business Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting</Role>
      <ShortName>Note 2 - Business Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 3 - Accounts Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-3-accounts-receivable</Role>
      <ShortName>Note 3 - Accounts Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 4 - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition</Role>
      <ShortName>Note 4 - Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 5 - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-5-inventories</Role>
      <ShortName>Note 5 - Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 6 - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-6-income-taxes</Role>
      <ShortName>Note 6 - Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 7 - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill</Role>
      <ShortName>Note 7 - Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 8 - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation</Role>
      <ShortName>Note 8 - Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 9 - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-9-earnings-per-share</Role>
      <ShortName>Note 9 - Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 10 - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-10-debt</Role>
      <ShortName>Note 10 - Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 11 - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases</Role>
      <ShortName>Note 11 - Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 12 - Restricted Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-12-restricted-cash</Role>
      <ShortName>Note 12 - Restricted Cash</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 13 - Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-13-fair-value-</Role>
      <ShortName>Note 13 - Fair Value</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 14 - Recent Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-14-recent-accounting-pronouncements-</Role>
      <ShortName>Note 14 - Recent Accounting Pronouncements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 15 - Noncontrolling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-15-noncontrolling-interest</Role>
      <ShortName>Note 15 - Noncontrolling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995468 - Disclosure - Note 2 - Business Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting-tables</Role>
      <ShortName>Note 2 - Business Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995469 - Disclosure - Note 4 - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition-tables</Role>
      <ShortName>Note 4 - Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995470 - Disclosure - Note 5 - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-5-inventories-tables</Role>
      <ShortName>Note 5 - Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-5-inventories</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995471 - Disclosure - Note 7 - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill-tables</Role>
      <ShortName>Note 7 - Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995472 - Disclosure - Note 8 - Stock-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-tables</Role>
      <ShortName>Note 8 - Stock-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995473 - Disclosure - Note 9 - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-9-earnings-per-share-tables</Role>
      <ShortName>Note 9 - Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-9-earnings-per-share</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995474 - Disclosure - Note 11 - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-tables</Role>
      <ShortName>Note 11 - Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-11-leases</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995475 - Disclosure - Note 12 - Restricted Cash (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-12-restricted-cash-tables</Role>
      <ShortName>Note 12 - Restricted Cash (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-12-restricted-cash</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995476 - Disclosure - Note 2 - Business Segment Reporting (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting-details-textual</Role>
      <ShortName>Note 2 - Business Segment Reporting (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting-tables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995477 - Disclosure - Note 2 - Business Segment Reporting - Schedule of Segment Reporting (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-2-business-segment-reporting-schedule-of-segment-reporting-details</Role>
      <ShortName>Note 2 - Business Segment Reporting - Schedule of Segment Reporting (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995478 - Disclosure - Note 3 - Accounts Receivable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-3-accounts-receivable-details-textual</Role>
      <ShortName>Note 3 - Accounts Receivable (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-3-accounts-receivable</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995479 - Disclosure - Note 4 - Revenue Recognition (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition-details-textual</Role>
      <ShortName>Note 4 - Revenue Recognition (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition-tables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995480 - Disclosure - Note 4 - Revenue Recognition - Revenues by Revenue Class (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition-revenues-by-revenue-class-details</Role>
      <ShortName>Note 4 - Revenue Recognition - Revenues by Revenue Class (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995481 - Disclosure - Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-4-revenue-recognition-reconciliation-of-the-cost-in-excess-of-billings-details</Role>
      <ShortName>Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995482 - Disclosure - Note 5 - Inventories - Schedule of Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-5-inventories-schedule-of-inventory-details</Role>
      <ShortName>Note 5 - Inventories - Schedule of Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995483 - Disclosure - Note 6 - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-6-income-taxes-details-textual</Role>
      <ShortName>Note 6 - Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-6-income-taxes</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995484 - Disclosure - Note 7 - Goodwill (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill-details-textual</Role>
      <ShortName>Note 7 - Goodwill (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill-tables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995485 - Disclosure - Note 7 - Goodwill - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-7-goodwill-goodwill-details</Role>
      <ShortName>Note 7 - Goodwill - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995486 - Disclosure - Note 8 - Stock-based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-details-textual</Role>
      <ShortName>Note 8 - Stock-based Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-tables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995487 - Disclosure - Note 8 - Stock-based Compensation - Stock-based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-stockbased-compensation-expense-details</Role>
      <ShortName>Note 8 - Stock-based Compensation - Stock-based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995488 - Disclosure - Note 8 - Stock-based Compensation - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-stock-option-activity-details</Role>
      <ShortName>Note 8 - Stock-based Compensation - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995489 - Disclosure - Note 8 - Stock-based Compensation - Restricted Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-8-stockbased-compensation-restricted-stock-activity-details</Role>
      <ShortName>Note 8 - Stock-based Compensation - Restricted Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995490 - Disclosure - Note 9 - Earnings Per Share - Schedule of Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-9-earnings-per-share-schedule-of-earnings-per-share-details</Role>
      <ShortName>Note 9 - Earnings Per Share - Schedule of Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995491 - Disclosure - Note 10 - Debt (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-10-debt-details-textual</Role>
      <ShortName>Note 10 - Debt (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-10-debt</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>995492 - Disclosure - Note 11 - Leases (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-details-textual</Role>
      <ShortName>Note 11 - Leases (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-11-leases-tables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>995493 - Disclosure - Note 11 - Leases - Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-lease-costs-details</Role>
      <ShortName>Note 11 - Leases - Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>995494 - Disclosure - Note 11 - Leases - Supplemental Balance Sheet Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-supplemental-balance-sheet-information-related-to-leases-details</Role>
      <ShortName>Note 11 - Leases - Supplemental Balance Sheet Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>995495 - Disclosure - Note 11 - Leases - Weighted-average Lease Terms and Discount Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-weightedaverage-lease-terms-and-discount-rates-details</Role>
      <ShortName>Note 11 - Leases - Weighted-average Lease Terms and Discount Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>995496 - Disclosure - Note 11 - Leases - Supplemental Cash Flow Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-supplemental-cash-flow-information-related-to-leases-details</Role>
      <ShortName>Note 11 - Leases - Supplemental Cash Flow Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>995497 - Disclosure - Note 11 - Leases - Maturities of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-11-leases-maturities-of-lease-liabilities-details</Role>
      <ShortName>Note 11 - Leases - Maturities of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>995498 - Disclosure - Note 12 - Restricted Cash - Summary of Cash, Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-12-restricted-cash-summary-of-cash-cash-equivalents-and-restricted-cash-details</Role>
      <ShortName>Note 12 - Restricted Cash - Summary of Cash, Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ppih20250731_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>995499 - Disclosure - Note 15 - Noncontrolling Interest (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20250731/role/statement-note-15-noncontrolling-interest-details-textual</Role>
      <ShortName>Note 15 - Noncontrolling Interest (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20250731/role/statement-note-15-noncontrolling-interest</ParentRole>
      <Position>55</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ppih-20250731.xsd</File>
    <File>ppih-20250731_cal.xml</File>
    <File>ppih-20250731_def.xml</File>
    <File>ppih-20250731_lab.xml</File>
    <File>ppih-20250731_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ppih20250731_10q.htm">ppih20250731_10q.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>logo.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="743">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
