<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>164</ContextCount>
  <ElementCount>297</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>49</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - Condensed Consolidated Balance sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100040 - Statement - Condensed Consolidated Balance sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100060 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100080 - Statement - Condensed Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100090 - Statement - Condensed Consolidated Statements of Comprehensive Loss (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedStatementsOfComprehensiveLossParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100100 - Statement - Condensed Consolidated Statements of Preferred Units and Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedStatementsOfPreferredUnitsAndStockholdersEquityDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Preferred Units and Stockholders' Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100110 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100120 - Disclosure - Nature of Business and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NatureOfBusinessAndBasisOfPresentation</Role>
      <ShortName>Nature of Business and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100130 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100140 - Disclosure - Fair Value Measurements and Marketable Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/FairValueMeasurementsAndMarketableSecurities</Role>
      <ShortName>Fair Value Measurements and Marketable Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100150 - Disclosure - Collaboration Agreement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CollaborationAgreement</Role>
      <ShortName>Collaboration Agreement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100160 - Disclosure - Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/AccruedExpenses</Role>
      <ShortName>Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100170 - Disclosure - Short-term borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DisclosureShorttermBorrowings1</Role>
      <ShortName>Short-term borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100180 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100190 - Disclosure - Stock/Equity-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensation</Role>
      <ShortName>Stock/Equity-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100200 - Disclosure - Net Loss per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NetLossPerShare</Role>
      <ShortName>Net Loss per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100210 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100220 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100230 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100240 - Disclosure - Fair Value Measurements and Marketable Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/FairValueMeasurementsAndMarketableSecuritiesTables</Role>
      <ShortName>Fair Value Measurements and Marketable Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/FairValueMeasurementsAndMarketableSecurities</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100250 - Disclosure - Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/AccruedExpensesTables</Role>
      <ShortName>Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/AccruedExpenses</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100260 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/Debt</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100270 - Disclosure - Stock/Equity-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensationTables</Role>
      <ShortName>Stock/Equity-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensation</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100280 - Disclosure - Net Loss per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NetLossPerShareTables</Role>
      <ShortName>Net Loss per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/NetLossPerShare</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100290 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/Leases</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100300 - Disclosure - Nature of Business and Basis of Presentation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NatureOfBusinessAndBasisOfPresentationAdditionalInformationDetail</Role>
      <ShortName>Nature of Business and Basis of Presentation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100310 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100320 - Disclosure - Fair Value Measurements and Marketable Securities - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/FairValueMeasurementsAndMarketableSecuritiesSummaryOfAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail</Role>
      <ShortName>Fair Value Measurements and Marketable Securities - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100350 - Disclosure - Collaboration Agreement - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CollaborationAgreementAdditionalInformationDetail</Role>
      <ShortName>Collaboration Agreement - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100360 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/AccruedExpensesScheduleOfAccruedExpensesDetail</Role>
      <ShortName>Accrued Expenses - Schedule of Accrued Expenses (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100370 - Disclosure - Accrued Expenses (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DisclosureAccruedExpensesAdditionalInformationDetails</Role>
      <ShortName>Accrued Expenses (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/AccruedExpensesTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100380 - Disclosure - Accrued Expenses - Summary of restructuring balance accrued expenses and other current liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DisclosureAccruedExpensesSummaryOfRestructuringBalanceAccruedExpensesAndOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Accrued Expenses - Summary of restructuring balance accrued expenses and other current liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100390 - Disclosure - Short-term borrowing (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DisclosureShorttermBorrowingAdditionalInformationDetails</Role>
      <ShortName>Short-term borrowing (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://yumanity.com/20220630/taxonomy/role/DisclosureShorttermBorrowings1</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100400 - Disclosure - Debt - Summary of Long-term Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DebtSummaryOfLongTermDebtDetail</Role>
      <ShortName>Debt - Summary of Long-term Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100410 - Disclosure - Debt - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/DebtAdditionalInformationDetail</Role>
      <ShortName>Debt - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100420 - Disclosure - Stock/Equity-Based Compensation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensationAdditionalInformationDetail</Role>
      <ShortName>Stock/Equity-Based Compensation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100430 - Disclosure - Stock/Equity-Based Compensation - Summary of Restricted Stock Unit Activity and Related Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensationSummaryOfRestrictedStockUnitActivityAndRelatedInformationDetail</Role>
      <ShortName>Stock/Equity-Based Compensation - Summary of Restricted Stock Unit Activity and Related Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100440 - Disclosure - Stock/Equity-Based Compensation - Summary of Stock Option Activity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensationSummaryOfStockOptionActivityDetail</Role>
      <ShortName>Stock/Equity-Based Compensation - Summary of Stock Option Activity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100450 - Disclosure - Stock/Equity-Based Compensation - Summary of Stock-Based Compensation Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/StockEquityBasedCompensationSummaryOfStockBasedCompensationExpenseDetail</Role>
      <ShortName>Stock/Equity-Based Compensation - Summary of Stock-Based Compensation Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100460 - Disclosure - Net Loss per Share - Schedule of Basic and Diluted Net Loss per Share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NetLossPerShareScheduleOfBasicAndDilutedNetLossPerShareDetail</Role>
      <ShortName>Net Loss per Share - Schedule of Basic and Diluted Net Loss per Share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100470 - Disclosure - Net Loss per Share - Schedule of Antidilutive Securities Excluded from Computation of Diluted Weighted-average Shares Outstanding (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/NetLossPerShareScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfDilutedWeightedAverageSharesOutstandingDetail</Role>
      <ShortName>Net Loss per Share - Schedule of Antidilutive Securities Excluded from Computation of Diluted Weighted-average Shares Outstanding (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100480 - Disclosure - Leases - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesAdditionalInformationDetail</Role>
      <ShortName>Leases - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100490 - Disclosure - Leases - Summary of lease cost (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesSummaryOfLeaseCostDetail</Role>
      <ShortName>Leases - Summary of lease cost (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100500 - Disclosure - Leases - Summary of supplemental disclosure of cash flow information related to leases (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesSummaryOfSupplementalDisclosureOfCashFlowInformationRelatedToLeasesDetail</Role>
      <ShortName>Leases - Summary of supplemental disclosure of cash flow information related to leases (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100510 - Disclosure - Leases - Schedule of weighted-average remaining lease term and discount rate (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRateDetail</Role>
      <ShortName>Leases - Schedule of weighted-average remaining lease term and discount rate (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100520 - Disclosure - Leases - Summary of future annual Operating lease payments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesSummaryOfFutureAnnualOperatingLeasePaymentsDetail</Role>
      <ShortName>Leases - Summary of future annual Operating lease payments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100530 - Disclosure - Leases - Summary of  table presents lease assets and liabilities and their classification on the condensed consolidated balance sheet  (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/LeasesSummaryOfTablePresentsLeaseAssetsAndLiabilitiesAndTheirClassificationOnTheCondensedConsolidatedBalanceSheetDetail</Role>
      <ShortName>Leases - Summary of  table presents lease assets and liabilities and their classification on the condensed consolidated balance sheet  (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ymtx-20220630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100540 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://yumanity.com/20220630/taxonomy/role/CommitmentsAndContingenciesAdditionalInformationDetail</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" original="ymtx-20220630.htm">ymtx-20220630.htm</File>
    <File>ymtx-20220630.xsd</File>
    <File>ymtx-20220630_cal.xml</File>
    <File>ymtx-20220630_def.xml</File>
    <File>ymtx-20220630_lab.xml</File>
    <File>ymtx-20220630_pre.xml</File>
    <File>ymtx-ex31_1.htm</File>
    <File>ymtx-ex31_2.htm</File>
    <File>ymtx-ex32_1.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="557">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
