<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.2.u1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>238</ContextCount>
  <ElementCount>282</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>70</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedBalanceSheets</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00000007 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/UnauditedCondensedConsolidatedStatementsOfShareholdersEquity</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.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>9</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995513 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995514 - Disclosure - Finance Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivables</Role>
      <ShortName>Finance Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995515 - Disclosure - Securitization Trust Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SecuritizationTrustDebt</Role>
      <ShortName>Securitization Trust Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995516 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995517 - Disclosure - Interest Income and Interest Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/InterestIncomeAndInterestExpense</Role>
      <ShortName>Interest Income and Interest Expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995518 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995519 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995520 - Disclosure - Legal Proceedings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/LegalProceedings</Role>
      <ShortName>Legal Proceedings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995521 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995522 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995523 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995524 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995525 - Disclosure - Finance Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesTables</Role>
      <ShortName>Finance Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivables</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995526 - Disclosure - Securitization Trust Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SecuritizationTrustDebtTables</Role>
      <ShortName>Securitization Trust Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SecuritizationTrustDebt</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995527 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/Debt</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995528 - Disclosure - Interest Income and Interest Expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/InterestIncomeAndInterestExpenseTables</Role>
      <ShortName>Interest Income and Interest Expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/InterestIncomeAndInterestExpense</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995529 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/EarningsPerShare</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995530 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurements</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995531 - Disclosure - Summary of Significant Accounting Policies (Details - Other income)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-OtherIncome</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Other income)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995532 - Disclosure - Summary of Significant Accounting Policies (Details - Supplemental balance sheet information related to leases)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-SupplementalBalanceSheetInformationRelatedToLeases</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Supplemental balance sheet information related to leases)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995533 - Disclosure - Summary of Significant Accounting Policies (Details - Maturities of lease liabilities)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-MaturitiesOfLeaseLiabilities</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Maturities of lease liabilities)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995534 - Disclosure - Summary of Significant Accounting Policies (Details - Lease cost)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-LeaseCost</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Lease cost)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995535 - Disclosure - Summary of Significant Accounting Policies (Details - Lease - Cash flow)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-Lease-CashFlow</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Lease - Cash flow)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995536 - Disclosure - Summary of Significant Accounting Policies (Details - Option activity)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-OptionActivity</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Option activity)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995537 - Disclosure - Summary of Significant Accounting Policies (Details - Options outstanding and exercisable)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-OptionsOutstandingAndExercisable</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Options outstanding and exercisable)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995538 - Disclosure - Summary of Significant Accounting Policies (Details - Stock purchases)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetails-StockPurchases</Role>
      <ShortName>Summary of Significant Accounting Policies (Details - Stock purchases)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995539 - Disclosure - Summary of Significant Accounting Policies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>Summary of Significant Accounting Policies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995540 - Disclosure - Finance Receivables (Details - Delinquency status)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetails-DelinquencyStatus</Role>
      <ShortName>Finance Receivables (Details - Delinquency status)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995541 - Disclosure - Finance Receivables (Details - Amortized cost basis)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetails-AmortizedCostBasis</Role>
      <ShortName>Finance Receivables (Details - Amortized cost basis)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995542 - Disclosure - Finance Receivables (Details - Summary of activity)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetails-SummaryOfActivity</Role>
      <ShortName>Finance Receivables (Details - Summary of activity)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995543 - Disclosure - Finance Receivables (Details - Charge-offs for financed receivables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetails-Charge-offsForFinancedReceivables</Role>
      <ShortName>Finance Receivables (Details - Charge-offs for financed receivables)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995544 - Disclosure - Finance Receivables (Details - Repossessed inventory)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetails-RepossessedInventory</Role>
      <ShortName>Finance Receivables (Details - Repossessed inventory)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995545 - Disclosure - Finance Receivables (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FinanceReceivablesDetailsNarrative</Role>
      <ShortName>Finance Receivables (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FinanceReceivablesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995546 - Disclosure - Securitization Trust Debt (Details - Debt components)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SecuritizationTrustDebtDetails-DebtComponents</Role>
      <ShortName>Securitization Trust Debt (Details - Debt components)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SecuritizationTrustDebtTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995547 - Disclosure - Securitization Trust Debt (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/SecuritizationTrustDebtDetailsNarrative</Role>
      <ShortName>Securitization Trust Debt (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/SecuritizationTrustDebtTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995548 - Disclosure - Debt (Details - Debt outstanding)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/DebtDetails-DebtOutstanding</Role>
      <ShortName>Debt (Details - Debt outstanding)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/DebtTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995549 - Disclosure - Debt (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/DebtDetailsNarrative</Role>
      <ShortName>Debt (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/DebtTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Interest Income and Interest Expense (Details - Interest income)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/InterestIncomeAndInterestExpenseDetails-InterestIncome</Role>
      <ShortName>Interest Income and Interest Expense (Details - Interest income)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/InterestIncomeAndInterestExpenseTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>995551 - Disclosure - Interest Income and Interest Expense (Details - Interest expense)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/InterestIncomeAndInterestExpenseDetails-InterestExpense</Role>
      <ShortName>Interest Income and Interest Expense (Details - Interest expense)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/InterestIncomeAndInterestExpenseTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>995552 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/EarningsPerShareTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>995553 - Disclosure - Earnings Per Share (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/EarningsPerShareDetailsNarrative</Role>
      <ShortName>Earnings Per Share (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/EarningsPerShareTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>995554 - Disclosure - Income Taxes (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/IncomeTaxesDetailsNarrative</Role>
      <ShortName>Income Taxes (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/IncomeTaxes</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>995555 - Disclosure - Legal Proceedings (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/LegalProceedingsDetailsNarrative</Role>
      <ShortName>Legal Proceedings (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/LegalProceedings</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>995556 - Disclosure - Fair Value Measurements (Details - Reconciliation of finance receivables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsDetails-ReconciliationOfFinanceReceivables</Role>
      <ShortName>Fair Value Measurements (Details - Reconciliation of finance receivables)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>995557 - Disclosure - Fair Value Measurements (Details - Finance receivables to their contractual balances)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsDetails-FinanceReceivablesToTheirContractualBalances</Role>
      <ShortName>Fair Value Measurements (Details - Finance receivables to their contractual balances)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>995558 - Disclosure - Fair Value Measurements (Details - Level 3 fair value measurements)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsDetails-Level3FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements (Details - Level 3 fair value measurements)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>995559 - Disclosure - Fair Value Measurements (Details - Delinquency status)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsDetails-DelinquencyStatus</Role>
      <ShortName>Fair Value Measurements (Details - Delinquency status)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="cps_i10q-063024.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>995560 - Disclosure - Fair Value Measurements (Details - Fair values)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://consumerportfolio.com/role/FairValueMeasurementsDetails-FairValues</Role>
      <ShortName>Fair Value Measurements (Details - Fair values)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://consumerportfolio.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="cps_i10q-063024.htm">cps_i10q-063024.htm</File>
    <File>cpss-20240630.xsd</File>
    <File>cpss-20240630_cal.xml</File>
    <File>cpss-20240630_def.xml</File>
    <File>cpss-20240630_lab.xml</File>
    <File>cpss-20240630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2024</BaseTaxonomy>
    <BaseTaxonomy items="746">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
