<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>135</ContextCount>
  <ElementCount>317</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>44</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="crvs-20221231x10k.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.corvuspharma.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="crvs-20221231x10k.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.corvuspharma.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="crvs-20221231x10k.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.corvuspharma.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00405 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/StatementConsolidatedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureOrganization</Role>
      <ShortName>Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="crvs-20221231x10k.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.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Net Loss per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureNetLossPerShare</Role>
      <ShortName>Net Loss per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Equity Method Investment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestment</Role>
      <ShortName>Equity Method Investment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10601 - Disclosure - License and Collaboration Agreements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureLicenseAndCollaborationAgreements</Role>
      <ShortName>License and Collaboration Agreements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Balance Sheet Components</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponents</Role>
      <ShortName>Balance Sheet Components</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Common Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureCommonStock</Role>
      <ShortName>Common Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Stock Option Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockOptionPlans</Role>
      <ShortName>Stock Option Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Facility Lease</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLease</Role>
      <ShortName>Facility Lease</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>20202 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>30203 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Net Loss per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureNetLossPerShareTables</Role>
      <ShortName>Net Loss per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureNetLossPerShare</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>30403 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Equity Method Investment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestmentTables</Role>
      <ShortName>Equity Method Investment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestment</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Balance Sheet Components (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponentsTables</Role>
      <ShortName>Balance Sheet Components (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponents</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Common Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureCommonStockTables</Role>
      <ShortName>Common Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureCommonStock</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Stock Option Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockOptionPlansTables</Role>
      <ShortName>Stock Option Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureStockOptionPlans</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Facility Lease (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLeaseTables</Role>
      <ShortName>Facility Lease (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureFacilityLease</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureRelatedPartyTransactions</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>40101 - Disclosure - Organization - Public Offerings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureOrganizationPublicOfferingsDetails</Role>
      <ShortName>Organization - Public Offerings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Net Loss per Share - Net Loss per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureNetLossPerShareNetLossPerShareDetails</Role>
      <ShortName>Net Loss per Share - Net Loss per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Net Loss per Share - Anti-Dilutive Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureNetLossPerShareAntiDilutiveSecuritiesDetails</Role>
      <ShortName>Net Loss per Share - Anti-Dilutive Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Fair Value Measurements - Recurring (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFairValueMeasurementsRecurringDetails</Role>
      <ShortName>Fair Value Measurements - Recurring (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40402 - Disclosure - Fair Value Measurements - Available For Sale (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFairValueMeasurementsAvailableForSaleDetails</Role>
      <ShortName>Fair Value Measurements - Available For Sale (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Equity Method Investment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestmentDetails</Role>
      <ShortName>Equity Method Investment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestmentTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Equity Method Investment - Summary Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureEquityMethodInvestmentSummaryFinancialInformationDetails</Role>
      <ShortName>Equity Method Investment - Summary Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40601 - Disclosure - License and Collaboration Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureLicenseAndCollaborationAgreementsDetails</Role>
      <ShortName>License and Collaboration Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureLicenseAndCollaborationAgreements</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Balance Sheet Components - Prepaid and Other Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponentsPrepaidAndOtherCurrentAssetsDetails</Role>
      <ShortName>Balance Sheet Components - Prepaid and Other Current Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40702 - Disclosure - Balance Sheet Components - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponentsPropertyAndEquipmentDetails</Role>
      <ShortName>Balance Sheet Components - Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40703 - Disclosure - Balance Sheet Components - Accrued and Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureBalanceSheetComponentsAccruedAndOtherLiabilitiesDetails</Role>
      <ShortName>Balance Sheet Components - Accrued and Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureCommonStockDetails</Role>
      <ShortName>Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureCommonStockTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Stock Option Plans - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockOptionPlansStockOptionActivityDetails</Role>
      <ShortName>Stock Option Plans - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Stock Option Plan - Vested or Expected to Vest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockOptionPlanVestedOrExpectedToVestDetails</Role>
      <ShortName>Stock Option Plan - Vested or Expected to Vest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Stock-Based Compensation - Expense Allocation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockBasedCompensationExpenseAllocationDetails</Role>
      <ShortName>Stock-Based Compensation - Expense Allocation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Stock Based Compensation -Valuation Assumptions Employees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureStockBasedCompensationValuationAssumptionsEmployeesDetails</Role>
      <ShortName>Stock Based Compensation -Valuation Assumptions Employees (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Income Taxes - Components of loss before income tax and Income tax benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesComponentsOfLossBeforeIncomeTaxAndIncomeTaxBenefitsDetails</Role>
      <ShortName>Income Taxes - Components of loss before income tax and Income tax benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>41102 - Disclosure - Income Taxes - Reconciliation of effective tax rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesReconciliationOfEffectiveTaxRateDetails</Role>
      <ShortName>Income Taxes - Reconciliation of effective tax rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>41103 - Disclosure - Income Taxes - Deferred tax assets net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesDeferredTaxAssetsNetDetails</Role>
      <ShortName>Income Taxes - Deferred tax assets net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>41104 - Disclosure - Income Taxes - Operating loss carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesOperatingLossCarryforwardsDetails</Role>
      <ShortName>Income Taxes - Operating loss carryforwards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>41105 - Disclosure - Income Taxes - Tax credit carry forwards and of Investments in Foreign Subsidiaries (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesTaxCreditCarryForwardsAndOfInvestmentsInForeignSubsidiariesDetails</Role>
      <ShortName>Income Taxes - Tax credit carry forwards and of Investments in Foreign Subsidiaries (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>41106 - Disclosure - Income Taxes - Unrecognized tax benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureIncomeTaxesUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Income Taxes - Unrecognized tax benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Facility Lease - Lessee information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLeaseLesseeInformationDetails</Role>
      <ShortName>Facility Lease - Lessee information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>41202 - Disclosure - Facility Lease - Lease cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLeaseLeaseCostDetails</Role>
      <ShortName>Facility Lease - Lease cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>41203 - Disclosure - Facility Lease - Minimum rental commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLeaseMinimumRentalCommitmentsDetails</Role>
      <ShortName>Facility Lease - Minimum rental commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41204 - Disclosure - Facility Lease - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureFacilityLeaseAdditionalInformationDetails</Role>
      <ShortName>Facility Lease - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Commitments and Contingencies - Line of Credit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureCommitmentsAndContingenciesLineOfCreditDetails</Role>
      <ShortName>Commitments and Contingencies - Line of Credit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="crvs-20221231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.corvuspharma.com/role/DisclosureRelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.corvuspharma.com/role/DisclosureRelatedPartyTransactionsTables</ParentRole>
      <Position>63</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 AccountsReceivableRelatedPartiesCurrent in us-gaap/2022 used in 2 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. crvs-20221231x10k.htm 107</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 17 fact(s) appearing in ix:hidden were eligible for transformation: crvs:IncreaseDecreaseInOperatingLeaseLiabilities, crvs:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingAndExercisableAggregateIntrinsicValue, us-gaap:CommonStockSharesOutstanding, us-gaap:EarningsPerShareDiluted, us-gaap:PreferredStockSharesOutstanding, us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding -  crvs-20221231x10k.htm 9</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Not-Referenced] WARN: 2 fact(s) appearing in ix:hidden were not referenced by any -sec-ix-hidden style property: us-gaap:CommitmentsAndContingencies -  crvs-20221231x10k.htm 9</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-K" original="crvs-20221231x10k.htm">crvs-20221231x10k.htm</File>
    <File>crvs-20221231.xsd</File>
    <File>crvs-20221231_cal.xml</File>
    <File>crvs-20221231_def.xml</File>
    <File>crvs-20221231_lab.xml</File>
    <File>crvs-20221231_pre.xml</File>
    <File>crvs-20221231xex21d1.htm</File>
    <File>crvs-20221231xex23d1.htm</File>
    <File>crvs-20221231xex31d1.htm</File>
    <File>crvs-20221231xex31d2.htm</File>
    <File>crvs-20221231xex32d1.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>crvs-20221231x10k007.jpg</File>
    <File>crvs-20221231x10k008.jpg</File>
    <File>crvs-20221231x10k009.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2022</BaseTaxonomy>
    <BaseTaxonomy items="596">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="36">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
