<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.2.u1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>122</ContextCount>
  <ElementCount>189</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>27</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="apt20240630_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://www.alphaprotech.com/20240630/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Condensed Consolidated Statements of Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-statements-of-income-unaudited</Role>
      <ShortName>Condensed Consolidated Statements of Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-statements-of-comprehensive-income-unaudited</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited</Role>
      <ShortName>Condensed Consolidated Statements of Shareholders' Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 1 - The Company</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-1-the-company</Role>
      <ShortName>Note 1 - The Company</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 2 - Basis of Presentation and Revenue Recognition Policy</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-2-basis-of-presentation-and-revenue-recognition-policy</Role>
      <ShortName>Note 2 - Basis of Presentation and Revenue Recognition Policy</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 3 - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity</Role>
      <ShortName>Note 3 - Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 4 - Recent Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-4-recent-accounting-pronouncements</Role>
      <ShortName>Note 4 - Recent Accounting Pronouncements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 5 - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-5-inventories</Role>
      <ShortName>Note 5 - Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 6 - Equity Investment in Unconsolidated Affiliate</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-6-equity-investment-in-unconsolidated-affiliate</Role>
      <ShortName>Note 6 - Equity Investment in Unconsolidated Affiliate</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 7 - Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-7-accrued-liabilities</Role>
      <ShortName>Note 7 - Accrued Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 8 - Basic and Diluted Earnings Per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-8-basic-and-diluted-earnings-per-common-share</Role>
      <ShortName>Note 8 - Basic and Diluted Earnings Per Common Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 9 - Accumulated Other Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-9-accumulated-other-comprehensive-loss</Role>
      <ShortName>Note 9 - Accumulated Other Comprehensive Loss</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 10 - Activity of Business Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments</Role>
      <ShortName>Note 10 - Activity of Business Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 11 - Financial Information About Geographic Areas</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-11-financial-information-about-geographic-areas</Role>
      <ShortName>Note 11 - Financial Information About Geographic Areas</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 12 - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-12-related-party-transactions</Role>
      <ShortName>Note 12 - Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 13 - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-</Role>
      <ShortName>Note 13 - Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 14 - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-14-income-taxes</Role>
      <ShortName>Note 14 - Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 15 - Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-15-contingencies</Role>
      <ShortName>Note 15 - Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 16 - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-16-subsequent-events</Role>
      <ShortName>Note 16 - Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.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>24</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995468 - Disclosure - Note 3 - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity-tables</Role>
      <ShortName>Note 3 - Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995469 - Disclosure - Note 5 - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-5-inventories-tables</Role>
      <ShortName>Note 5 - Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-5-inventories</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995470 - Disclosure - Note 7 - Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-7-accrued-liabilities-tables</Role>
      <ShortName>Note 7 - Accrued Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-7-accrued-liabilities</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995471 - Disclosure - Note 8 - Basic and Diluted Earnings Per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-8-basic-and-diluted-earnings-per-common-share-tables</Role>
      <ShortName>Note 8 - Basic and Diluted Earnings Per Common Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-8-basic-and-diluted-earnings-per-common-share</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995472 - Disclosure - Note 10 - Activity of Business Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-tables</Role>
      <ShortName>Note 10 - Activity of Business Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995473 - Disclosure - Note 11 - Financial Information About Geographic Areas (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-11-financial-information-about-geographic-areas-tables</Role>
      <ShortName>Note 11 - Financial Information About Geographic Areas (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-11-financial-information-about-geographic-areas</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995474 - Disclosure - Note 13 - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-tables</Role>
      <ShortName>Note 13 - Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995475 - Disclosure - Note 3 - Shareholders' Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity-details-textual</Role>
      <ShortName>Note 3 - Shareholders' Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity-tables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995476 - Disclosure - Note 3 - Shareholders' Equity - Restricted Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity-restricted-stock-activity-details</Role>
      <ShortName>Note 3 - Shareholders' Equity - Restricted Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995477 - Disclosure - Note 3 - Shareholders' Equity - Information About Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-3-shareholders-equity-information-about-stock-options-details</Role>
      <ShortName>Note 3 - Shareholders' Equity - Information About Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995478 - Disclosure - Note 5 - Inventories - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-5-inventories-inventories-details</Role>
      <ShortName>Note 5 - Inventories - Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995479 - Disclosure - Note 6 - Equity Investment in Unconsolidated Affiliate (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-6-equity-investment-in-unconsolidated-affiliate-details-textual</Role>
      <ShortName>Note 6 - Equity Investment in Unconsolidated Affiliate (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-6-equity-investment-in-unconsolidated-affiliate</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995480 - Disclosure - Note 7 - Accrued Liabilities - Accrued Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-7-accrued-liabilities-accrued-liabilities-details</Role>
      <ShortName>Note 7 - Accrued Liabilities - Accrued Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995481 - Disclosure - Note 8 - Basic and Diluted Earnings Per Common Share - Reconciliation of Net Income and Number of Shares Used in Computations of Basic and Diluted EPS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-8-basic-and-diluted-earnings-per-common-share-reconciliation-of-net-income-and-number-of-shares-used-in-computations-of-basic-and-diluted-eps-details</Role>
      <ShortName>Note 8 - Basic and Diluted Earnings Per Common Share - Reconciliation of Net Income and Number of Shares Used in Computations of Basic and Diluted EPS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995482 - Disclosure - Note 9 - Accumulated Other Comprehensive Loss (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-9-accumulated-other-comprehensive-loss-details-textual</Role>
      <ShortName>Note 9 - Accumulated Other Comprehensive Loss (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-9-accumulated-other-comprehensive-loss</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995483 - Disclosure - Note 10 - Activity of Business Segments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-details-textual</Role>
      <ShortName>Note 10 - Activity of Business Segments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-tables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995484 - Disclosure - Note 10 - Activity of Business Segments - Consolidated Net Sales (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-consolidated-net-sales-details</Role>
      <ShortName>Note 10 - Activity of Business Segments - Consolidated Net Sales (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995485 - Disclosure - Note 10 - Activity of Business Segments - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-reconciliation-of-total-segment-income-to-total-consolidated-net-income-details</Role>
      <ShortName>Note 10 - Activity of Business Segments - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995486 - Disclosure - Note 10 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-10-activity-of-business-segments-consolidated-net-property-and-equipment-goodwill-and-intangible-assets-details</Role>
      <ShortName>Note 10 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995487 - Disclosure - Note 11 - Financial Information About Geographic Areas - Consolidated Net Sales and Long-lived Asset Information by Geographic Area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-11-financial-information-about-geographic-areas-consolidated-net-sales-and-longlived-asset-information-by-geographic-area-details</Role>
      <ShortName>Note 11 - Financial Information About Geographic Areas - Consolidated Net Sales and Long-lived Asset Information by Geographic Area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995488 - Disclosure - Note 13 - Leases (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-details-textual</Role>
      <ShortName>Note 13 - Leases (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-tables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995489 - Disclosure - Note 13 - Leases - Future Minimum Lease Payment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-13-leases-future-minimum-lease-payment-details</Role>
      <ShortName>Note 13 - Leases - Future Minimum Lease Payment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="apt20240630_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995490 - Disclosure - Note 15 - Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alphaprotech.com/20240630/role/statement-note-15-contingencies-details-textual</Role>
      <ShortName>Note 15 - Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.alphaprotech.com/20240630/role/statement-note-15-contingencies</ParentRole>
      <Position>47</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>apt-20240630.xsd</File>
    <File>apt-20240630_cal.xml</File>
    <File>apt-20240630_def.xml</File>
    <File>apt-20240630_lab.xml</File>
    <File>apt-20240630_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="apt20240630_10q.htm">apt20240630_10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="491">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
