<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>158</ContextCount>
  <ElementCount>308</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>46</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="tmb-20210930x10q.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.cvrx.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveLoss</Role>
      <ShortName>Condensed Consolidated Statements of Operations and Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/StatementCondensedConsolidatedStatementsOfConvertiblePreferredStockAndStockholdersEquityDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00400 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/StatementCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Business Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureBusinessOrganization</Role>
      <ShortName>Business Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Selected Balance Sheet Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformation</Role>
      <ShortName>Selected Balance Sheet Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureDebt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Stockholders Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockholdersEquity</Role>
      <ShortName>Stockholders Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10901 - Disclosure - (Loss) Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureLossEarningsPerShare</Role>
      <ShortName>(Loss) Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Employee Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureEmployeeBenefitPlans</Role>
      <ShortName>Employee Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Segment, Geographic Information and Revenue Disaggregation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSegmentGeographicInformationAndRevenueDisaggregation</Role>
      <ShortName>Segment, Geographic Information and Revenue Disaggregation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>20202 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Selected Balance Sheet Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationTables</Role>
      <ShortName>Selected Balance Sheet Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformation</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>30403 - Disclosure - Fair value measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair value measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureDebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureDebt</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>30903 - Disclosure - (Loss) Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureLossEarningsPerShareTables</Role>
      <ShortName>(Loss) Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureLossEarningsPerShare</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Segment, Geographic Information and Revenue Disaggregation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSegmentGeographicInformationAndRevenueDisaggregationTables</Role>
      <ShortName>Segment, Geographic Information and Revenue Disaggregation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSegmentGeographicInformationAndRevenueDisaggregation</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Selected Balance Sheet Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationNarrativeDetails</Role>
      <ShortName>Selected Balance Sheet Information (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationTables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Selected Balance Sheet Information (Schedule of Inventory) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationScheduleOfInventoryDetails</Role>
      <ShortName>Selected Balance Sheet Information (Schedule of Inventory) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>40303 - Disclosure - Selected Balance Sheet Information (Schedule of Property and Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationScheduleOfPropertyAndEquipmentDetails</Role>
      <ShortName>Selected Balance Sheet Information (Schedule of Property and Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>40304 - Disclosure - Selected Balance Sheet Information (Schedule of Accrued Expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationScheduleOfAccruedExpensesDetails</Role>
      <ShortName>Selected Balance Sheet Information (Schedule of Accrued Expenses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSelectedBalanceSheetInformationTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Fair value measurements (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureFairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair value measurements (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>40402 - Disclosure - Fair Value Measurements (Liabilities Measured at Fair Value on a Recurring Basis) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureFairValueMeasurementsLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Liabilities Measured at Fair Value on a Recurring Basis) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>40403 - Disclosure - Fair Value Measurements (Fair Value of Convertible Preferred Stock Warrants) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureFairValueMeasurementsFairValueOfConvertiblePreferredStockWarrantsDetails</Role>
      <ShortName>Fair Value Measurements (Fair Value of Convertible Preferred Stock Warrants) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Debt (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureDebtNarrativeDetails</Role>
      <ShortName>Debt (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureDebtTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Debt (Annual Principal Maturities of Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureDebtAnnualPrincipalMaturitiesOfDebtDetails</Role>
      <ShortName>Debt (Annual Principal Maturities of Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureDebtTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Stockholders Equity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockholdersEquityNarrativeDetails</Role>
      <ShortName>Stockholders Equity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockholdersEquity</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Stock-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensationNarrativeDetails</Role>
      <ShortName>Stock-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40702 - Disclosure - Stock-Based Compensation (Summary of Stock Option Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetails</Role>
      <ShortName>Stock-Based Compensation (Summary of Stock Option Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40703 - Disclosure - Stock-Based Compensation (Assumptions Used in Determine the Grant Date Fair Value of Stock Options) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensationAssumptionsUsedInDetermineGrantDateFairValueOfStockOptionsDetails</Role>
      <ShortName>Stock-Based Compensation (Assumptions Used in Determine the Grant Date Fair Value of Stock Options) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40704 - Disclosure - Stock-Based Compensation (Recognized Stock-Based Compensation Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureStockBasedCompensationRecognizedStockBasedCompensationExpenseDetails</Role>
      <ShortName>Stock-Based Compensation (Recognized Stock-Based Compensation Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40901 - Disclosure - (Loss) Earnings Per Share (Basic and Diluted Net Loss per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureLossEarningsPerShareBasicAndDilutedNetLossPerShareDetails</Role>
      <ShortName>(Loss) Earnings Per Share (Basic and Diluted Net Loss per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureLossEarningsPerShareTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40902 - Disclosure - (Loss) Earnings Per Share (Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureLossEarningsPerShareAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails</Role>
      <ShortName>(Loss) Earnings Per Share (Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureLossEarningsPerShareTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Commitments and Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureCommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments and Contingencies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureCommitmentsAndContingenciesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Commitments and Contingencies (Future Minimum Lease Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureCommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails</Role>
      <ShortName>Commitments and Contingencies (Future Minimum Lease Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureCommitmentsAndContingenciesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Segment, Geographic Information and Revenue Disaggregation (Schedule of Segment Reporting) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSegmentGeographicInformationAndRevenueDisaggregationScheduleOfSegmentReportingDetails</Role>
      <ShortName>Segment, Geographic Information and Revenue Disaggregation (Schedule of Segment Reporting) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSegmentGeographicInformationAndRevenueDisaggregationTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="tmb-20210930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Subsequent Events (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cvrx.com/role/DisclosureSubsequentEventsNarrativeDetails</Role>
      <ShortName>Subsequent Events (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cvrx.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>48</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="tmb-20210930x10q.htm">tmb-20210930x10q.htm</File>
    <File>tmb-20210930.xsd</File>
    <File>tmb-20210930_cal.xml</File>
    <File>tmb-20210930_def.xml</File>
    <File>tmb-20210930_lab.xml</File>
    <File>tmb-20210930_pre.xml</File>
    <File>tmb-20210930xex31d1.htm</File>
    <File>tmb-20210930xex31d2.htm</File>
    <File>tmb-20210930xex32d1.htm</File>
    <File>tmb-20210930xex32d2.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2021</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
