<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>190</ContextCount>
  <ElementCount>538</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>79</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="ppih-20210131.xml">
      <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/20210131/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-statements-of-operations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Statements of Comprehensive Income/(Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-statements-of-comprehensive-incomeloss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income/(Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Balance Sheet</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-balance-sheet</Role>
      <ShortName>Consolidated Balance Sheet</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Balance Sheet (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-balance-sheet-parentheticals</Role>
      <ShortName>Consolidated Balance Sheet (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-statements-of-stockholders-equity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-consolidated-statements-of-cash-flows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 1 - Business Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-1-business-information</Role>
      <ShortName>Note 1 - Business Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 2 - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies</Role>
      <ShortName>Note 2 - Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 3 - Retention</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-3-retention</Role>
      <ShortName>Note 3 - Retention</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <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/20210131/role/statement-note-4-revenue-recognition</Role>
      <ShortName>Note 4 - Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 5 - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-5-debt</Role>
      <ShortName>Note 5 - Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 6 - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases</Role>
      <ShortName>Note 6 - Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 7 - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes</Role>
      <ShortName>Note 7 - Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 8 - Retirement Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans</Role>
      <ShortName>Note 8 - Retirement Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 9 - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation</Role>
      <ShortName>Note 9 - Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 10 - Interest Expense, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-10-interest-expense-net</Role>
      <ShortName>Note 10 - Interest Expense, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Schedule II - Valuation and Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-schedule-ii-valuation-and-qualifying-accounts</Role>
      <ShortName>Schedule II - Valuation and Qualifying Accounts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 1 - Business Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-1-business-information-tables</Role>
      <ShortName>Note 1 - Business Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-1-business-information</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 2 - Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-tables</Role>
      <ShortName>Note 2 - Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 4 - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-4-revenue-recognition-tables</Role>
      <ShortName>Note 4 - Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-4-revenue-recognition</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 5 - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-5-debt-tables</Role>
      <ShortName>Note 5 - Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-5-debt</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 6 - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-tables</Role>
      <ShortName>Note 6 - Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-6-leases</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Note 7 - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-tables</Role>
      <ShortName>Note 7 - Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 8 - Retirement Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-tables</Role>
      <ShortName>Note 8 - Retirement Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 9 - Stock-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-tables</Role>
      <ShortName>Note 9 - Stock-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 10 - Interest Expense, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-10-interest-expense-net-tables</Role>
      <ShortName>Note 10 - Interest Expense, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-10-interest-expense-net</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Schedule II - Valuation and Qualifying Accounts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-schedule-ii-valuation-and-qualifying-accounts-tables</Role>
      <ShortName>Schedule II - Valuation and Qualifying Accounts (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-schedule-ii-valuation-and-qualifying-accounts</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 1 - Business Information (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-1-business-information-details-textual</Role>
      <ShortName>Note 1 - Business Information (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-1-business-information-tables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 1 - Business Information - Geographic Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-1-business-information-geographic-information-details</Role>
      <ShortName>Note 1 - Business Information - Geographic Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 2 - Significant Accounting Policies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-details-textual</Role>
      <ShortName>Note 2 - Significant Accounting Policies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-tables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure - Note 2 - Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-cash-cash-equivalents-and-restricted-cash-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Note 2 - Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-accumulated-other-comprehensive-loss-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>034 - Disclosure - Note 2 - Significant Accounting Policies - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-inventories-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>035 - Disclosure - Note 2 - Significant Accounting Policies - Long-Lived Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-longlived-assets-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Long-Lived Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>036 - Disclosure - Note 2 - Significant Accounting Policies - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-goodwill-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>037 - Disclosure - Note 2 - Significant Accounting Policies - Net Loss Per Common Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-2-significant-accounting-policies-net-loss-per-common-share-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Net Loss Per Common Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>038 - Disclosure - Note 3 - Retention (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-3-retention-details-textual</Role>
      <ShortName>Note 3 - Retention (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-3-retention</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>039 - Disclosure - Note 4 - Revenue Recognition (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/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/20210131/role/statement-note-4-revenue-recognition-tables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>040 - Disclosure - Note 4 - Revenue Recognition - Revenues by Revenue Class (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/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>41</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>041 - Disclosure - Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/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>42</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>042 - Disclosure - Note 5 - Debt (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-5-debt-details-textual</Role>
      <ShortName>Note 5 - Debt (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-5-debt-tables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>043 - Disclosure - Note 5 - Debt - Debt by Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-5-debt-debt-by-type-details</Role>
      <ShortName>Note 5 - Debt - Debt by Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>044 - Disclosure - Note 5 - Debt - Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-5-debt-maturities-details</Role>
      <ShortName>Note 5 - Debt - Maturities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>045 - Disclosure - Note 6 - Leases (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-details-textual</Role>
      <ShortName>Note 6 - Leases (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-6-leases-tables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>046 - Disclosure - Note 6 - Leases - Supplemental Balance Sheet Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-supplemental-balance-sheet-information-related-to-leases-details</Role>
      <ShortName>Note 6 - Leases - Supplemental Balance Sheet Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>047 - Disclosure - Note 6 - Leases - Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-lease-costs-details</Role>
      <ShortName>Note 6 - Leases - Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>048 - Disclosure - Note 6 - Leases - Weighted-average Lease Terms and Discount Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-weightedaverage-lease-terms-and-discount-rates-details</Role>
      <ShortName>Note 6 - Leases - Weighted-average Lease Terms and Discount Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>049 - Disclosure - Note 6 - Leases - Maturities of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-6-leases-maturities-of-lease-liabilities-details</Role>
      <ShortName>Note 6 - Leases - Maturities of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>050 - Disclosure - Note 7 - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-details-textual</Role>
      <ShortName>Note 7 - Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-tables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>051 - Disclosure - Note 7 - Income Taxes - Income Taxes (Loss) Income Before Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-income-taxes-loss-income-before-income-taxes-details</Role>
      <ShortName>Note 7 - Income Taxes - Income Taxes (Loss) Income Before Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>052 - Disclosure - Note 7 - Income Taxes - Components of Income Tax Expense/(Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-components-of-income-tax-expensebenefit-details</Role>
      <ShortName>Note 7 - Income Taxes - Components of Income Tax Expense/(Benefit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>053 - Disclosure - Note 7 - Income Taxes - Income Tax Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-income-tax-reconciliation-details</Role>
      <ShortName>Note 7 - Income Taxes - Income Tax Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>054 - Disclosure - Note 7 - Income Taxes - Deferred Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-deferred-tax-assets-details</Role>
      <ShortName>Note 7 - Income Taxes - Deferred Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>055 - Disclosure - Note 7 - Income Taxes - Uncertain Tax Positions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-7-income-taxes-uncertain-tax-positions-details</Role>
      <ShortName>Note 7 - Income Taxes - Uncertain Tax Positions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>056 - Disclosure - Note 8 - Retirement Plans (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-details-textual</Role>
      <ShortName>Note 8 - Retirement Plans (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-tables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>057 - Disclosure - Note 8 - Retirement Plans - Asset Allocation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-asset-allocation-details</Role>
      <ShortName>Note 8 - Retirement Plans - Asset Allocation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>058 - Disclosure - Note 8 - Retirement Plans - Benefit Obligations, Plan Assets and Funded Status of Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-benefit-obligations-plan-assets-and-funded-status-of-plan-details</Role>
      <ShortName>Note 8 - Retirement Plans - Benefit Obligations, Plan Assets and Funded Status of Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>059 - Disclosure - Note 8 - Retirement Plans - Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-assumptions-details</Role>
      <ShortName>Note 8 - Retirement Plans - Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>060 - Disclosure - Note 8 - Retirement Plans - Components of Net Periodic Benefit Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-components-of-net-periodic-benefit-cost-details</Role>
      <ShortName>Note 8 - Retirement Plans - Components of Net Periodic Benefit Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>061 - Disclosure - Note 8 - Retirement Plans - Cash Flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-cash-flows-details</Role>
      <ShortName>Note 8 - Retirement Plans - Cash Flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>062 - Disclosure - Note 8 - Retirement Plans - Multi-Employer (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-8-retirement-plans-multiemployer-details</Role>
      <ShortName>Note 8 - Retirement Plans - Multi-Employer (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>063 - Disclosure - Note 9 - Stock-based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-details-textual</Role>
      <ShortName>Note 9 - Stock-based Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-tables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>064 - Disclosure - Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-stockbased-compensation-expense-details</Role>
      <ShortName>Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>065 - Disclosure - Note 9 - Stock-based Compensation - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-stock-option-activity-details</Role>
      <ShortName>Note 9 - Stock-based Compensation - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>066 - Disclosure - Note 9 - Stock-based Compensation - Unvested Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-unvested-option-activity-details</Role>
      <ShortName>Note 9 - Stock-based Compensation - Unvested Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>067 - Disclosure - Note 9 - Stock-based Compensation - Restricted Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-9-stockbased-compensation-restricted-stock-activity-details</Role>
      <ShortName>Note 9 - Stock-based Compensation - Restricted Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>068 - Disclosure - Note 10 - Interest Expense, Net - Interest Expense, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-note-10-interest-expense-net-interest-expense-net-details</Role>
      <ShortName>Note 10 - Interest Expense, Net - Interest Expense, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ppih-20210131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>069 - Disclosure - Schedule II - Valuation and Qualifying Accounts - Valuation Allowance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investors.permapipe.com/20210131/role/statement-schedule-ii-valuation-and-qualifying-accounts-valuation-allowance-details</Role>
      <ShortName>Schedule II - Valuation and Qualifying Accounts - Valuation Allowance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</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-20210131.xml</File>
    <File>ppih-20210131.xsd</File>
    <File>ppih-20210131_cal.xml</File>
    <File>ppih-20210131_def.xml</File>
    <File>ppih-20210131_lab.xml</File>
    <File>ppih-20210131_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
