<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>698</ContextCount>
  <ElementCount>511</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>177</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="kfs20250930_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://kingsway-financial.com/20250930/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-balance-sheets-current-period-unaudited-</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-operations-unaudited</Role>
      <ShortName>Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Statements of Comprehensive Loss (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-comprehensive-loss-unaudited</Role>
      <ShortName>Consolidated Statements of Comprehensive Loss (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Shareholders' Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-shareholders-equity-unaudited</Role>
      <ShortName>Consolidated Statements of Shareholders' Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-shareholders-equity-unaudited-parentheticals</Role>
      <ShortName>Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Statement - Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Statement - Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-consolidated-statements-of-cash-flows-unaudited-parentheticals</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 1 - Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-1-business-</Role>
      <ShortName>Note 1 - Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 2 - Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-2-basis-of-presentation-</Role>
      <ShortName>Note 2 - Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 3 - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-3-summary-of-significant-accounting-policies-</Role>
      <ShortName>Note 3 - Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 4 - Recently Issued Accounting Standards</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-4-recently-issued-accounting-standards</Role>
      <ShortName>Note 4 - Recently Issued Accounting Standards</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 5 - Acquisitions and Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 6 - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-</Role>
      <ShortName>Note 6 - Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 7 - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill</Role>
      <ShortName>Note 7 - Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 8 - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets</Role>
      <ShortName>Note 8 - Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 9 - Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-</Role>
      <ShortName>Note 9 - Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 10 - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-</Role>
      <ShortName>Note 10 - Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 11 - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-11-leases-</Role>
      <ShortName>Note 11 - Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 12 - Revenue From Contracts With Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 13 - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-</Role>
      <ShortName>Note 13 - Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 14 - Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-14-loss-per-share</Role>
      <ShortName>Note 14 - Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 15 - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-15-stockbased-compensation</Role>
      <ShortName>Note 15 - Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Note 16 - Redeemable Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-</Role>
      <ShortName>Note 16 - Redeemable Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 17 - Redeemable Noncontrolling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest</Role>
      <ShortName>Note 17 - Redeemable Noncontrolling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 18 - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-</Role>
      <ShortName>Note 18 - Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 19 - Accumulated Other Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-19-accumulated-other-comprehensive-loss</Role>
      <ShortName>Note 19 - Accumulated Other Comprehensive Loss</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Note 20 - Segmented Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-</Role>
      <ShortName>Note 20 - Segmented Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 21 - Fair Value of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 22 - Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-22-related-parties-</Role>
      <ShortName>Note 22 - Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 23 - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-23-commitments-and-contingencies</Role>
      <ShortName>Note 23 - Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.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>33</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995478 - Disclosure - Note 5 - Acquisitions and Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-tables</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995479 - Disclosure - Note 6 - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-tables</Role>
      <ShortName>Note 6 - Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-6-investments-</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995480 - Disclosure - Note 7 - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill-tables</Role>
      <ShortName>Note 7 - Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995481 - Disclosure - Note 8 - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets-tables</Role>
      <ShortName>Note 8 - Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995482 - Disclosure - Note 9 - Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-tables</Role>
      <ShortName>Note 9 - Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995483 - Disclosure - Note 10 - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-tables</Role>
      <ShortName>Note 10 - Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-10-debt-</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995484 - Disclosure - Note 11 - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-11-leases-tables</Role>
      <ShortName>Note 11 - Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-11-leases-</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995485 - Disclosure - Note 12 - Revenue From Contracts With Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-tables</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995486 - Disclosure - Note 13 - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-tables</Role>
      <ShortName>Note 13 - Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995487 - Disclosure - Note 14 - Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-14-loss-per-share-tables</Role>
      <ShortName>Note 14 - Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-14-loss-per-share</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995488 - Disclosure - Note 16 - Redeemable Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-tables</Role>
      <ShortName>Note 16 - Redeemable Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995489 - Disclosure - Note 17 - Redeemable Noncontrolling Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest-tables</Role>
      <ShortName>Note 17 - Redeemable Noncontrolling Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995490 - Disclosure - Note 18 - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-tables</Role>
      <ShortName>Note 18 - Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995491 - Disclosure - Note 19 - Accumulated Other Comprehensive Loss (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-19-accumulated-other-comprehensive-loss-tables</Role>
      <ShortName>Note 19 - Accumulated Other Comprehensive Loss (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-19-accumulated-other-comprehensive-loss</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>995492 - Disclosure - Note 20 - Segmented Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-tables</Role>
      <ShortName>Note 20 - Segmented Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>995493 - Disclosure - Note 21 - Fair Value of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-tables</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>995494 - Disclosure - Note 5 - Acquisitions and Discontinued Operations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-details-textual</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-tables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>995495 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Roundhouse Electric &amp; Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-assets-acquired-and-liabilities-assumed-roundhouse-electric-equipment-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Roundhouse Electric &amp; Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>995496 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - AAA Advanced Plumbing and Drain (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-assets-acquired-and-liabilities-assumed-aaa-advanced-plumbing-and-drain-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - AAA Advanced Plumbing and Drain (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>995497 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Southside Plumbing (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-assets-acquired-and-liabilities-assumed-southside-plumbing-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Southside Plumbing (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>995498 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Bud's Plumbing (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-assets-acquired-and-liabilities-assumed-buds-plumbing-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Bud's Plumbing (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>995499 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Image Solutions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-assets-acquired-and-liabilities-assumed-image-solutions-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Assets Acquired and Liabilities Assumed - Image Solutions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>995500 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-pro-forma-information-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>995501 - Disclosure - Note 5 - Acquisitions and Discontinued Operations - Financial Information From Discontinued Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-5-acquisitions-and-discontinued-operations-financial-information-from-discontinued-operations-details</Role>
      <ShortName>Note 5 - Acquisitions and Discontinued Operations - Financial Information From Discontinued Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>995502 - Disclosure - Note 6 - Investments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-details-textual</Role>
      <ShortName>Note 6 - Investments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-6-investments-tables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>995503 - Disclosure - Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-amortized-cost-gross-unrealized-gains-and-losses-and-estimated-fair-value-details</Role>
      <ShortName>Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>995504 - Disclosure - Note 6 - Investments - Fixed Maturities by Contractual Maturity Periods (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-fixed-maturities-by-contractual-maturity-periods-details</Role>
      <ShortName>Note 6 - Investments - Fixed Maturities by Contractual Maturity Periods (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>995505 - Disclosure - Note 6 - Investments - Unrealized Loss Position (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-unrealized-loss-position-details</Role>
      <ShortName>Note 6 - Investments - Unrealized Loss Position (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>995506 - Disclosure - Note 6 - Investments - Net Investment Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-net-investment-income-details</Role>
      <ShortName>Note 6 - Investments - Net Investment Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>995507 - Disclosure - Note 6 - Investments - Gross Realized Gains and Losses on Available-for-sale Investments, Limited Liability Investment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-gross-realized-gains-and-losses-on-availableforsale-investments-limited-liability-investment-details</Role>
      <ShortName>Note 6 - Investments - Gross Realized Gains and Losses on Available-for-sale Investments, Limited Liability Investment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>995508 - Disclosure - Note 6 - Investments - Loss on Change in Fair Value of Equity Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-6-investments-loss-on-change-in-fair-value-of-equity-investments-details</Role>
      <ShortName>Note 6 - Investments - Loss on Change in Fair Value of Equity Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>995509 - Disclosure - Note 7 - Goodwill (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill-details-textual</Role>
      <ShortName>Note 7 - Goodwill (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill-tables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>995510 - Disclosure - Note 7 - Goodwill - Intangible Assets, Goodwill and Other (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-7-goodwill-intangible-assets-goodwill-and-other-details</Role>
      <ShortName>Note 7 - Goodwill - Intangible Assets, Goodwill and Other (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>995511 - Disclosure - Note 8 - Intangible Assets (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets-details-textual</Role>
      <ShortName>Note 8 - Intangible Assets (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets-tables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>995512 - Disclosure - Note 8 - Intangible Assets - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets-intangible-assets-details</Role>
      <ShortName>Note 8 - Intangible Assets - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>995513 - Disclosure - Note 8 - Intangible Assets- Intangible Assets Acquired (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-8-intangible-assets-intangible-assets-acquired-details</Role>
      <ShortName>Note 8 - Intangible Assets- Intangible Assets Acquired (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>995514 - Disclosure - Note 9 - Property and Equipment (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-details-textual</Role>
      <ShortName>Note 9 - Property and Equipment (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-tables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>995515 - Disclosure - Note 9 - Property and Equipment - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-9-property-and-equipment-property-and-equipment-details</Role>
      <ShortName>Note 9 - Property and Equipment - Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>995516 - Disclosure - Note 10 - Debt (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-details-textual</Role>
      <ShortName>Note 10 - Debt (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-10-debt-tables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>995517 - Disclosure - Note 10 - Debt - Component of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-component-of-debt-details</Role>
      <ShortName>Note 10 - Debt - Component of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>995518 - Disclosure - Note 10 - Debt - Subordinated Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-subordinated-borrowings-details</Role>
      <ShortName>Note 10 - Debt - Subordinated Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>995519 - Disclosure - Note 10 - Debt - Schedule of Debt Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-10-debt-schedule-of-debt-maturities-details</Role>
      <ShortName>Note 10 - Debt - Schedule of Debt Maturities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>995520 - Disclosure - Note 11 - Leases (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-11-leases-details-textual</Role>
      <ShortName>Note 11 - Leases (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-11-leases-tables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>995521 - Disclosure - Note 11 - Leases - Lease Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-11-leases-lease-cost-details</Role>
      <ShortName>Note 11 - Leases - Lease Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>995522 - Disclosure - Note 11 - Leases - Annual Maturities of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-11-leases-annual-maturities-of-lease-liabilities-details</Role>
      <ShortName>Note 11 - Leases - Annual Maturities of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>995523 - Disclosure - Note 12 - Revenue From Contracts With Customers 1 (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-1-details-textual</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers 1 (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-tables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>995524 - Disclosure - Note 12 - Revenue From Contracts With Customers 2 (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-2-details-textual</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers 2 (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-tables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>995525 - Disclosure - Note 12 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-disaggregation-of-revenue-details</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>995526 - Disclosure - Note 12 - Revenue From Contracts With Customers - Summary of Contract Assets and Contract Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-summary-of-contract-assets-and-contract-liabilities-details</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers - Summary of Contract Assets and Contract Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>995527 - Disclosure - Note 12 - Revenue From Contracts With Customers - Deferred Contract Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-12-revenue-from-contracts-with-customers-deferred-contract-costs-details</Role>
      <ShortName>Note 12 - Revenue From Contracts With Customers - Deferred Contract Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>995528 - Disclosure - Note 13 - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-details-textual</Role>
      <ShortName>Note 13 - Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-tables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>995529 - Disclosure - Note 13 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-13-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details</Role>
      <ShortName>Note 13 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>995530 - Disclosure - Note 14 - Loss Per Share - Schedule of Earnings per Share, Basic and Diluted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-14-loss-per-share-schedule-of-earnings-per-share-basic-and-diluted-details</Role>
      <ShortName>Note 14 - Loss Per Share - Schedule of Earnings per Share, Basic and Diluted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>995531 - Disclosure - Note 14 - Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-14-loss-per-share-schedule-of-antidilutive-securities-excluded-from-computation-of-earnings-per-share-details</Role>
      <ShortName>Note 14 - Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>995532 - Disclosure - Note 15 - Stock-based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-15-stockbased-compensation-details-textual</Role>
      <ShortName>Note 15 - Stock-based Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-15-stockbased-compensation</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>995533 - Disclosure - Note 16 - Redeemable Preferred Stock (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-details-textual</Role>
      <ShortName>Note 16 - Redeemable Preferred Stock (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-tables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>995534 - Disclosure - Note 16 - Redeemable Preferred Stock - Schedule of Redeemable Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-schedule-of-redeemable-preferred-stock-details</Role>
      <ShortName>Note 16 - Redeemable Preferred Stock - Schedule of Redeemable Preferred Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>995535 - Disclosure - Note 16 - Redeemable Preferred Stock - Schedule of Preferred Stock Dividends (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-16-redeemable-preferred-stock-schedule-of-preferred-stock-dividends-details</Role>
      <ShortName>Note 16 - Redeemable Preferred Stock - Schedule of Preferred Stock Dividends (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>995536 - Disclosure - Note 17 - Redeemable Noncontrolling Interest (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest-details-textual</Role>
      <ShortName>Note 17 - Redeemable Noncontrolling Interest (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest-tables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>995537 - Disclosure - Note 17 - Redeemable Noncontrolling Interest - Schedule of Redeemable Noncontrolling Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-17-redeemable-noncontrolling-interest-schedule-of-redeemable-noncontrolling-interest-details</Role>
      <ShortName>Note 17 - Redeemable Noncontrolling Interest - Schedule of Redeemable Noncontrolling Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>995538 - Disclosure - Note 18 - Shareholders' Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-details-textual</Role>
      <ShortName>Note 18 - Shareholders' Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-tables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>995539 - Disclosure - Note 18 - Shareholders' Equity - Schedule of Dividends to be Paid (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-18-shareholders-equity-schedule-of-dividends-to-be-paid-details</Role>
      <ShortName>Note 18 - Shareholders' Equity - Schedule of Dividends to be Paid (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>995540 - Disclosure - Note 19 - Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive (Loss) Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-19-accumulated-other-comprehensive-loss-schedule-of-accumulated-other-comprehensive-loss-income-details</Role>
      <ShortName>Note 19 - Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive (Loss) Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>995541 - Disclosure - Note 19 - Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive (Loss) Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-19-accumulated-other-comprehensive-loss-components-of-accumulated-other-comprehensive-loss-income-details</Role>
      <ShortName>Note 19 - Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive (Loss) Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>995542 - Disclosure - Note 20 - Segmented Information (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-details-textual</Role>
      <ShortName>Note 20 - Segmented Information (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-tables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>995543 - Disclosure - Note 20 - Segmented Information - Reconciliation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-reconciliation-of-revenue-details</Role>
      <ShortName>Note 20 - Segmented Information - Reconciliation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>995544 - Disclosure - Note 20 - Segmented Information - Reconciliation of Operating Profit (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-20-segmented-information-reconciliation-of-operating-profit-loss-details</Role>
      <ShortName>Note 20 - Segmented Information - Reconciliation of Operating Profit (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>995545 - Disclosure - Note 21 - Fair Value of Financial Instruments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-details-textual</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-tables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>995546 - Disclosure - Note 21 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-assets-and-liabilities-measured-at-fair-value-details</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>995547 - Disclosure - Note 21 - Fair Value of Financial Instruments - Reconciliation of the Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-reconciliation-of-the-fair-value-details</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments - Reconciliation of the Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>995548 - Disclosure - Note 21 - Fair Value of Financial Instruments - Fair Value Measurement Inputs and Valuation Techniques (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-fair-value-measurement-inputs-and-valuation-techniques-details</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments - Fair Value Measurement Inputs and Valuation Techniques (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>995549 - Disclosure - Note 21 - Fair Value of Financial Instruments - Fair Values for Level 3 Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-21-fair-value-of-financial-instruments-fair-values-for-level-3-measurements-details</Role>
      <ShortName>Note 21 - Fair Value of Financial Instruments - Fair Values for Level 3 Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Note 22 - Related Parties (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-22-related-parties-details-textual</Role>
      <ShortName>Note 22 - Related Parties (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-22-related-parties-</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="kfs20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>995551 - Disclosure - Note 23 - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://kingsway-financial.com/20250930/role/statement-note-23-commitments-and-contingencies-details-textual</Role>
      <ShortName>Note 23 - Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://kingsway-financial.com/20250930/role/statement-note-23-commitments-and-contingencies</ParentRole>
      <Position>107</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>kfs-20250930.xsd</File>
    <File>kfs-20250930_cal.xml</File>
    <File>kfs-20250930_def.xml</File>
    <File>kfs-20250930_lab.xml</File>
    <File>kfs-20250930_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="kfs20250930_10q.htm">kfs20250930_10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="2381">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>
