<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>247</ContextCount>
  <ElementCount>620</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>80</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00205 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLossParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00300 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureDescriptionOfBusiness</Role>
      <ShortName>Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="cert-20211231x10k.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://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Public Offerings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePublicOfferings</Role>
      <ShortName>Public Offerings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Concentrations of Credit Risk</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureConcentrationsOfCreditRisk</Role>
      <ShortName>Concentrations of Credit Risk</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Business Combinations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureBusinessCombinations</Role>
      <ShortName>Business Combinations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherSupplementalAssetsInformation</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePropertyAndEquipment</Role>
      <ShortName>Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Goodwill and Other Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssets</Role>
      <ShortName>Goodwill and Other Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Accrued Expenses and Other Supplemental Liabilities Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformation</Role>
      <ShortName>Accrued Expenses and Other Supplemental Liabilities Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Long-Term Debt and Revolving Line of Credit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCredit</Role>
      <ShortName>Long-Term Debt and Revolving Line of Credit</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Employee Benefit Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEmployeeBenefitPlan</Role>
      <ShortName>Employee Benefit Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Equity-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensation</Role>
      <ShortName>Equity-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Segment Data</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSegmentData</Role>
      <ShortName>Segment Data</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Earnings per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11801 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>20202 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>30203 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Business Combinations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureBusinessCombinationsTables</Role>
      <ShortName>Business Combinations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureBusinessCombinations</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherSupplementalAssetsInformationTables</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherSupplementalAssetsInformation</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePropertyAndEquipmentTables</Role>
      <ShortName>Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosurePropertyAndEquipment</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Goodwill and Other Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Other Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssets</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Accrued Expenses and Other Supplemental Liabilities Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformationTables</Role>
      <ShortName>Accrued Expenses and Other Supplemental Liabilities Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformation</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Long-Term Debt and Revolving Line of Credit (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCreditTables</Role>
      <ShortName>Long-Term Debt and Revolving Line of Credit (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCredit</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Equity-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationTables</Role>
      <ShortName>Equity-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureEquityBasedCompensation</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureLeases</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>31503 - Disclosure - Segment Data (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSegmentDataTables</Role>
      <ShortName>Segment Data (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureSegmentData</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31603 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>31703 - Disclosure - Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureEarningsPerShare</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Summary of Significant Accounting Policies - Cash and cash equivalents &amp; Deferred offering costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsDeferredOfferingCostsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Cash and cash equivalents &amp; Deferred offering costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40202 - Disclosure - Summary of Significant Accounting Policies - Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAccountsReceivableDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40203 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40204 - Disclosure - Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesGoodwillAndOtherIntangibleAssetsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40205 - Disclosure - Summary of Significant Accounting Policies - Derivatives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDerivativesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Derivatives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40206 - Disclosure - Summary of Significant Accounting Policies - Income Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesIncomeTaxBenefitsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Income Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40207 - Disclosure - Summary of Significant Accounting Policies - Revenue and Net income (loss) per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRevenueAndNetIncomeLossPerShareDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Revenue and Net income (loss) per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40208 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition ASC 606 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRevenueRecognitionAsc606Details</Role>
      <ShortName>Summary of Significant Accounting Policies - Revenue Recognition ASC 606 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40209 - Disclosure - Summary of Significant Accounting Policies - Comprehensive (Loss) Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSummaryOfSignificantAccountingPoliciesComprehensiveLossIncomeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Comprehensive (Loss) Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Public Offerings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePublicOfferingsDetails</Role>
      <ShortName>Public Offerings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosurePublicOfferings</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Business Combinations - Other Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureBusinessCombinationsOtherInformationDetails</Role>
      <ShortName>Business Combinations - Other Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Business Combinations - Fair Value of Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureBusinessCombinationsFairValueOfAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Business Combinations - Fair Value of Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40503 - Disclosure - Business Combinations - Supplemental pro forma information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureBusinessCombinationsSupplementalProFormaInformationDetails</Role>
      <ShortName>Business Combinations - Supplemental pro forma information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information - Prepaid and other current assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherSupplementalAssetsInformationPrepaidAndOtherCurrentAssetsDetails</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information - Prepaid and other current assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40602 - Disclosure - Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information - Other long-term assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherSupplementalAssetsInformationOtherLongTermAssetsDetails</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Supplemental Assets Information - Other long-term assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosurePropertyAndEquipmentDetails</Role>
      <ShortName>Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosurePropertyAndEquipmentTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Goodwill and Other Intangible Assets - Company's intangible assets (other than goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssetsCompanySIntangibleAssetsOtherThanGoodwillDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets - Company's intangible assets (other than goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Goodwill and Other Intangible Assets - Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssetsAmortizationDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets - Amortization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40803 - Disclosure - Goodwill and Other Intangible Assets - Estimated amortization expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssetsEstimatedAmortizationExpenseDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets - Estimated amortization expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40804 - Disclosure - Goodwill and Other Intangible Assets - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureGoodwillAndOtherIntangibleAssetsGoodwillDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Accrued Expenses and Other Supplemental Liabilities Information - Accrued expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformationAccruedExpensesDetails</Role>
      <ShortName>Accrued Expenses and Other Supplemental Liabilities Information - Accrued expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Accrued Expenses and Other Supplemental Liabilities Information - Other current liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformationOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Accrued Expenses and Other Supplemental Liabilities Information - Other current liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>40903 - Disclosure - Accrued Expenses and Other Supplemental Liabilities Information - Other long-term liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureAccruedExpensesAndOtherSupplementalLiabilitiesInformationOtherLongTermLiabilitiesDetails</Role>
      <ShortName>Accrued Expenses and Other Supplemental Liabilities Information - Other long-term liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Long-Term Debt and Revolving Line of Credit - Other Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCreditOtherInformationDetails</Role>
      <ShortName>Long-Term Debt and Revolving Line of Credit - Other Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Long-Term Debt and Revolving Line of Credit - Long-Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCreditLongTermDebtDetails</Role>
      <ShortName>Long-Term Debt and Revolving Line of Credit - Long-Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41003 - Disclosure - Long-Term Debt and Revolving Line of Credit - Maturity of Long Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLongTermDebtAndRevolvingLineOfCreditMaturityOfLongTermDebtDetails</Role>
      <ShortName>Long-Term Debt and Revolving Line of Credit - Maturity of Long Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Employee Benefit Plan - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEmployeeBenefitPlanNarrativeDetails</Role>
      <ShortName>Employee Benefit Plan - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Equity-Based Compensation - Class B Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationClassBPlansDetails</Role>
      <ShortName>Equity-Based Compensation - Class B Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>41302 - Disclosure - Equity-Based Compensation - Valuation Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationValuationAssumptionsDetails</Role>
      <ShortName>Equity-Based Compensation - Valuation Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>41303 - Disclosure - Equity-Based Compensation - Non Vested Performance Based Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationNonVestedPerformanceBasedActivityDetails</Role>
      <ShortName>Equity-Based Compensation - Non Vested Performance Based Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>41304 - Disclosure - Equity-Based Compensation - Restricted Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationRestrictedStockDetails</Role>
      <ShortName>Equity-Based Compensation - Restricted Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>41305 - Disclosure - Equity-Based Compensation - 2020 Incentive Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensation2020IncentivePlansDetails</Role>
      <ShortName>Equity-Based Compensation - 2020 Incentive Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>41306 - Disclosure - Equity-Based Compensation - Restricted Stock Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationRestrictedStockUnitsDetails</Role>
      <ShortName>Equity-Based Compensation - Restricted Stock Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>41307 - Disclosure - Equity-Based Compensation - 2020 Employee Stock Purchase Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensation2020EmployeeStockPurchasePlanDetails</Role>
      <ShortName>Equity-Based Compensation - 2020 Employee Stock Purchase Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>41308 - Disclosure - Equity-Based Compensation - Compensation expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEquityBasedCompensationCompensationExpenseDetails</Role>
      <ShortName>Equity-Based Compensation - Compensation expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureLeasesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>41402 - Disclosure - Leases - Lease Term and Discount Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesLeaseTermAndDiscountRatesDetails</Role>
      <ShortName>Leases - Lease Term and Discount Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>41403 - Disclosure - Leases - Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesLeaseCostsDetails</Role>
      <ShortName>Leases - Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>41404 - Disclosure - Leases - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesSupplementalCashFlowInformationDetails</Role>
      <ShortName>Leases - Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>41405 - Disclosure - Leases - Undiscounted Future Cash Flows Including Prior to Adoption of Topic 842 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureLeasesUndiscountedFutureCashFlowsIncludingPriorToAdoptionOfTopic842Details</Role>
      <ShortName>Leases - Undiscounted Future Cash Flows Including Prior to Adoption of Topic 842 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>41501 - Disclosure - Segment Data (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSegmentDataDetails</Role>
      <ShortName>Segment Data (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureSegmentDataTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>41601 - Disclosure - Income Taxes - Components of Loss Before Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesComponentsOfLossBeforeIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Components of Loss Before Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>41602 - Disclosure - Income Taxes - Income Tax Expense (Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesIncomeTaxExpenseBenefitDetails</Role>
      <ShortName>Income Taxes - Income Tax Expense (Benefit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>41603 - Disclosure - Income Taxes - Reconciliation of Income Tax Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxRatesDetails</Role>
      <ShortName>Income Taxes - Reconciliation of Income Tax Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>41604 - Disclosure - Income Taxes - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>41605 - Disclosure - Income Taxes - Temporary Differences (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesTemporaryDifferencesDetails</Role>
      <ShortName>Income Taxes - Temporary Differences (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>41606 - Disclosure - Income Taxes - Change in Valuation Allowance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesChangeInValuationAllowanceDetails</Role>
      <ShortName>Income Taxes - Change in Valuation Allowance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>41607 - Disclosure - Income Taxes - Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureIncomeTaxesReconciliationDetails</Role>
      <ShortName>Income Taxes - Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>41701 - Disclosure - Earnings per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureEarningsPerShareDetails</Role>
      <ShortName>Earnings per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureEarningsPerShareTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="cert-20211231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>41801 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.certara.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.certara.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>88</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-K" original="cert-20211231x10k.htm">cert-20211231x10k.htm</File>
    <File>cert-20211231.xsd</File>
    <File>cert-20211231_cal.xml</File>
    <File>cert-20211231_def.xml</File>
    <File>cert-20211231_lab.xml</File>
    <File>cert-20211231_pre.xml</File>
    <File>cert-20211231xex10d2.htm</File>
    <File>cert-20211231xex10d21.htm</File>
    <File>cert-20211231xex21d1.htm</File>
    <File>cert-20211231xex23d1.htm</File>
    <File>cert-20211231xex31d1.htm</File>
    <File>cert-20211231xex31d2.htm</File>
    <File>cert-20211231xex32d1.htm</File>
    <File>cert-20211231xex32d2.htm</File>
    <File>cert-20211231xex4d2.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>cert-20211231x10k005.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1097">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="37">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
