<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>221</ContextCount>
  <ElementCount>380</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>72</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Condensed Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedBalanceSheets</Role>
      <ShortName>Condensed Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Condensed Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Condensed Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedStatementsOfOperations</Role>
      <ShortName>Condensed Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - Condensed Statements of Changes in Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>Condensed Statements of Changes in Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00400 - Statement - Condensed Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedStatementsOfCashFlows</Role>
      <ShortName>Condensed Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00405 - Statement - Condensed Statements of Cash Flows (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/StatementCondensedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>Condensed Statements of Cash Flows (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10101 - Disclosure - NATURE OF BUSINESS AND BASIS OF PRESENTATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureNatureOfBusinessAndBasisOfPresentation</Role>
      <ShortName>NATURE OF BUSINESS AND BASIS OF PRESENTATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10301 - Disclosure - FACTORING OF ACCOUNTS RECEIVABLE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureFactoringOfAccountsReceivable</Role>
      <ShortName>FACTORING OF ACCOUNTS RECEIVABLE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10401 - Disclosure - PROPERTY AND EQUIPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosurePropertyAndEquipmentNet</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10501 - Disclosure - INTERNALLY DEVELOPED SOFTWARE, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureInternallyDevelopedSoftwareNet</Role>
      <ShortName>INTERNALLY DEVELOPED SOFTWARE, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10601 - Disclosure - SEVERANCE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSeverance</Role>
      <ShortName>SEVERANCE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10701 - Disclosure - DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebt</Role>
      <ShortName>DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10801 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10901 - Disclosure - STOCKHOLDERS' EQUITY (DEFICIT)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityDeficit</Role>
      <ShortName>STOCKHOLDERS' EQUITY (DEFICIT)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11001 - Disclosure - SHARE-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensation</Role>
      <ShortName>SHARE-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11101 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11201 - Disclosure - EMPLOYEE BENEFITS PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureEmployeeBenefitsPlan</Role>
      <ShortName>EMPLOYEE BENEFITS PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11301 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>30403 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosurePropertyAndEquipmentNetTables</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>30803 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>30903 - Disclosure - STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityTables</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureStockholdersEquityDeficit</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>31003 - Disclosure - SHARE-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationTables</Role>
      <ShortName>SHARE-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureShareBasedCompensation</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>31103 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>40101 - Disclosure - NATURE OF BUSINESS AND BASIS OF PRESENTATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureNatureOfBusinessAndBasisOfPresentationDetails</Role>
      <ShortName>NATURE OF BUSINESS AND BASIS OF PRESENTATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureNatureOfBusinessAndBasisOfPresentation</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>40102 - Disclosure - NATURE OF BUSINESS AND BASIS OF PRESENTATION - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureNatureOfBusinessAndBasisOfPresentationAdditionalInformationDetails</Role>
      <ShortName>NATURE OF BUSINESS AND BASIS OF PRESENTATION - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounting Standard Recently Adopted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAccountingStandardRecentlyAdoptedDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounting Standard Recently Adopted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>40203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition and Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRevenueRecognitionAndAccountsReceivableDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition and Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentNetDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Internally Developed Software, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesInternallyDevelopedSoftwareNetDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Internally Developed Software, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>40206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cost of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesCostOfRevenueDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cost of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>40207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>40208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Shares issuable upon conversion of preferred stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSummaryOfSignificantAccountingPoliciesSharesIssuableUponConversionOfPreferredStockDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Shares issuable upon conversion of preferred stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40301 - Disclosure - FACTORING OF ACCOUNTS RECEIVABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureFactoringOfAccountsReceivableDetails</Role>
      <ShortName>FACTORING OF ACCOUNTS RECEIVABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureFactoringOfAccountsReceivable</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40401 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosurePropertyAndEquipmentNetDetails</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40501 - Disclosure - INTERNALLY DEVELOPED SOFTWARE, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureInternallyDevelopedSoftwareNetDetails</Role>
      <ShortName>INTERNALLY DEVELOPED SOFTWARE, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureInternallyDevelopedSoftwareNet</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40601 - Disclosure - SEVERANCE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureSeveranceDetails</Role>
      <ShortName>SEVERANCE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureSeverance</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40701 - Disclosure - DEBT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtDetails</Role>
      <ShortName>DEBT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureDebt</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40702 - Disclosure - DEBT - Related Party Convertible Notes Payable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtRelatedPartyConvertibleNotesPayableDetails</Role>
      <ShortName>DEBT - Related Party Convertible Notes Payable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40703 - Disclosure - DEBT - Conversion of Convertible Notes Payable (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtConversionOfConvertibleNotesPayableDetails</Role>
      <ShortName>DEBT - Conversion of Convertible Notes Payable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40704 - Disclosure - DEBT - Bridge Financing (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtBridgeFinancingDetails</Role>
      <ShortName>DEBT - Bridge Financing (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40705 - Disclosure - DEBT - Bridge Financing - Automatic Conversion or Debt Extension (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtBridgeFinancingAutomaticConversionOrDebtExtensionDetails</Role>
      <ShortName>DEBT - Bridge Financing - Automatic Conversion or Debt Extension (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40706 - Disclosure - DEBT - Bridge Financing - Debt Extinguishment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtBridgeFinancingDebtExtinguishmentDetails</Role>
      <ShortName>DEBT - Bridge Financing - Debt Extinguishment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40707 - Disclosure - DEBT - Bridge Financing - Components of non-cash transaction (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtBridgeFinancingComponentsOfNonCashTransactionDetails</Role>
      <ShortName>DEBT - Bridge Financing - Components of non-cash transaction (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40708 - Disclosure - DEBT - Term Loan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureDebtTermLoanDetails</Role>
      <ShortName>DEBT - Term Loan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40801 - Disclosure - COMMITMENTS AND CONTINGENCIES - Lease costs related to operating lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesLeaseCostsRelatedToOperatingLeaseDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Lease costs related to operating lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40802 - Disclosure - COMMITMENTS AND CONTINGENCIES - Lease positions in Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesLeasePositionsInBalanceSheetsDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Lease positions in Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40803 - Disclosure - COMMITMENTS AND CONTINGENCIES - Lease Terms and Discount Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesLeaseTermsAndDiscountRateDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Lease Terms and Discount Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40804 - Disclosure - COMMITMENTS AND CONTINGENCIES - Future lease payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesFutureLeasePaymentsDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Future lease payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40805 - Disclosure - COMMITMENTS AND CONTINGENCIES - Cash Flows - Operating lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureCommitmentsAndContingenciesCashFlowsOperatingLeaseDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Cash Flows - Operating lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40901 - Disclosure - STOCKHOLDERS' EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40902 - Disclosure - STOCKHOLDERS' EQUITY - Common Stock - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityCommonStockDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Common Stock - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40903 - Disclosure - STOCKHOLDERS' EQUITY - Underwriter Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityUnderwriterWarrantsDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Underwriter Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40904 - Disclosure - STOCKHOLDERS' EQUITY - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityWarrantsDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>40905 - Disclosure - STOCKHOLDERS' EQUITY - Estimate the fair value of warrants granted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityEstimateFairValueOfWarrantsGrantedDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Estimate the fair value of warrants granted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>40906 - Disclosure - STOCKHOLDERS' EQUITY - Warrant activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureStockholdersEquityWarrantActivityDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Warrant activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41001 - Disclosure - SHARE-BASED COMPENSATION - 2021 Stock Incentive Plan - shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensation2021StockIncentivePlanSharesDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - 2021 Stock Incentive Plan - shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41002 - Disclosure - SHARE-BASED COMPENSATION - Estimate the fair value of stock options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationEstimateFairValueOfStockOptionsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Estimate the fair value of stock options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41003 - Disclosure - SHARE-BASED COMPENSATION - Stock option activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationStockOptionActivityDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Stock option activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41004 - Disclosure - SHARE-BASED COMPENSATION - Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationCompensationExpenseDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41005 - Disclosure - SHARE-BASED COMPENSATION - Restricted Stock Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationRestrictedStockUnitsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Restricted Stock Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>41006 - Disclosure - SHARE-BASED COMPENSATION - Restricted Stock Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationRestrictedStockAdditionalInformationDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Restricted Stock Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>41007 - Disclosure - SHARE-BASED COMPENSATION - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureShareBasedCompensationAdditionalInformationDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>41101 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>41102 - Disclosure - INCOME TAXES - Significant components of the Company's deferred tax assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureIncomeTaxesSignificantComponentsOfCompanySDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>INCOME TAXES - Significant components of the Company's deferred tax assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>41103 - Disclosure - INCOME TAXES - Reconciliation of the statutory income tax rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureIncomeTaxesReconciliationOfStatutoryIncomeTaxRatesDetails</Role>
      <ShortName>INCOME TAXES - Reconciliation of the statutory income tax rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ispc-20221231x10ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>41201 - Disclosure - EMPLOYEE BENEFITS PLAN (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://ispecimen.com/role/DisclosureEmployeeBenefitsPlanDetails</Role>
      <ShortName>EMPLOYEE BENEFITS PLAN (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://ispecimen.com/role/DisclosureEmployeeBenefitsPlan</ParentRole>
      <Position>71</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept TreasuryStockShares in us-gaap/2022 used in 5 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. ispc-20221231x10ka.htm 68, 70</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept InterestExpenseRelatedParty in us-gaap/2022 used in 1 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. ispc-20221231x10ka.htm 85</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 13 fact(s) appearing in ix:hidden were eligible for transformation: ispc:DebtInstrumentPrincipalPayableDayOfEachMonthDuringTermLoan, us-gaap:EarningsPerShareDiluted, us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1, us-gaap:NumberOfOperatingSegments, us-gaap:StockholdersEquityNoteStockSplitConversionRatio1, us-gaap:WarrantsAndRightsOutstandingTerm, us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding -  ispc-20221231x10ka.htm 9</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-K/A" original="ispc-20221231x10ka.htm">ispc-20221231x10ka.htm</File>
    <File>ispc-20221231.xsd</File>
    <File>ispc-20221231_cal.xml</File>
    <File>ispc-20221231_def.xml</File>
    <File>ispc-20221231_lab.xml</File>
    <File>ispc-20221231_pre.xml</File>
    <File>ispc-20221231xex23d1.htm</File>
    <File>ispc-20221231xex31d1.htm</File>
    <File>ispc-20221231xex31d2.htm</File>
    <File>ispc-20221231xex32d1.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ispc-20221231x10ka001.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="655">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="37">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
