<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>522</ContextCount>
  <ElementCount>442</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>106</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ConsolidatedBalanceSheet_Parentheticals</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Condensed Consolidated Statements of Changes in Mezzanine Equity and Stockholders’ Equity (Deficit) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ShareholdersEquityType2or3</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Mezzanine Equity and Stockholders’ Equity (Deficit) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ConsolidatedCashFlow</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Disclosure - Nature of the Business and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/NatureoftheBusinessandBasisofPresentation</Role>
      <ShortName>Nature of the Business and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/PropertyandEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/AccruedExpenses</Role>
      <ShortName>Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Product Warranty Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ProductWarrantyLiability</Role>
      <ShortName>Product Warranty Liability</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Debt (Related Party) and Interest Expense (Related Party)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedParty</Role>
      <ShortName>Debt (Related Party) and Interest Expense (Related Party)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Common Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/CommonStock</Role>
      <ShortName>Common Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Series A Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SeriesAPreferredStock</Role>
      <ShortName>Series A Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Net Loss per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/NetLossperShare</Role>
      <ShortName>Net Loss per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Operating Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/OperatingLeases</Role>
      <ShortName>Operating Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/StockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>996000 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/AccountingPoliciesByPolicy</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>996001 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>996002 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/FairValueMeasurements</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>996003 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/Inventories</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>996004 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/PropertyandEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/PropertyandEquipmentNet</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>996005 - Disclosure - Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/AccruedExpensesTables</Role>
      <ShortName>Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/AccruedExpenses</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>996006 - Disclosure - Product Warranty Liability (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ProductWarrantyLiabilityTables</Role>
      <ShortName>Product Warranty Liability (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/ProductWarrantyLiability</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>996007 - Disclosure - Debt (Related Party) and Interest Expense (Related Party) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyTables</Role>
      <ShortName>Debt (Related Party) and Interest Expense (Related Party) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedParty</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>996008 - Disclosure - Common Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/CommonStockTables</Role>
      <ShortName>Common Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/CommonStock</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>996009 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SegmentReporting</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>996010 - Disclosure - Net Loss per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/NetLossperShareTables</Role>
      <ShortName>Net Loss per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/NetLossperShare</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>996011 - Disclosure - Operating Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/OperatingLeasesTables</Role>
      <ShortName>Operating Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/OperatingLeases</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>996012 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/StockBasedCompensation</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>996013 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/IncomeTaxes</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>996014 - Disclosure - Nature of the Business and Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/NatureoftheBusinessandBasisofPresentationDetails</Role>
      <ShortName>Nature of the Business and Basis of Presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/NatureoftheBusinessandBasisofPresentation</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>996015 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SummaryofSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>996016 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/FairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>996017 - Disclosure - Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofLiabilitiesMeasuredatFairValueonaRecurringBasisTable</Role>
      <ShortName>Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>996018 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measurements of the Private Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFairValueMeasurementsofthePrivateWarrantLiabilityTable</Role>
      <ShortName>Fair Value Measurements - Schedule of Fair Value Measurements of the Private Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>996019 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measurements of the Forward Purchase Agreement Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFairValueMeasurementsoftheForwardPurchaseAgreementWarrantLiabilityTable</Role>
      <ShortName>Fair Value Measurements - Schedule of Fair Value Measurements of the Forward Purchase Agreement Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>996020 - Disclosure - Fair Value Measurements - Schedule of Instrument Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofInstrumentMeasuredatFairValueonaRecurringBasisTable</Role>
      <ShortName>Fair Value Measurements - Schedule of Instrument Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>996021 - Disclosure - Inventories - Schedule of Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofInventoriesTable</Role>
      <ShortName>Inventories - Schedule of Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>996022 - Disclosure - Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/PropertyandEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>996023 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofPropertyandEquipmentNetTable</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>996024 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofAccruedExpensesTable</Role>
      <ShortName>Accrued Expenses - Schedule of Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>996025 - Disclosure - Product Warranty Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ProductWarrantyLiabilityDetails</Role>
      <ShortName>Product Warranty Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/ProductWarrantyLiabilityTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>996026 - Disclosure - Product Warranty Liability - Schedule of Changes in Product Warranty Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofChangesinProductWarrantyLiabilityTable</Role>
      <ShortName>Product Warranty Liability - Schedule of Changes in Product Warranty Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>996027 - Disclosure - Debt (Related Party) and Interest Expense (Related Party) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyDetails</Role>
      <ShortName>Debt (Related Party) and Interest Expense (Related Party) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>996028 - Disclosure - Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/CommonStockDetails</Role>
      <ShortName>Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/CommonStockTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>996029 - Disclosure - Common Stock - Schedule of Outstanding Warrant Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofOutstandingWarrantActivityTable</Role>
      <ShortName>Common Stock - Schedule of Outstanding Warrant Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>996030 - Disclosure - Series A Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SeriesAPreferredStockDetails</Role>
      <ShortName>Series A Preferred Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SeriesAPreferredStock</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>996031 - Disclosure - Segment Reporting (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SegmentReportingDetails</Role>
      <ShortName>Segment Reporting (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SegmentReportingTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>996032 - Disclosure - Segment Reporting - Schedule of Significant Expense Categories Regularly Reviewed by the CODM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofSignificantExpenseCategoriesRegularlyReviewedbytheCODMTable</Role>
      <ShortName>Segment Reporting - Schedule of Significant Expense Categories Regularly Reviewed by the CODM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996033 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/RelatedPartyTransactions</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996034 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/CommitmentsandContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/CommitmentsandContingencies</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996035 - Disclosure - Net Loss per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/NetLossperShareDetails</Role>
      <ShortName>Net Loss per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/NetLossperShareTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996036 - Disclosure - Net Loss per Share - ​Schedule of Basic and Diluted Loss Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofBasicandDilutedLossPerShareTable</Role>
      <ShortName>Net Loss per Share - ​Schedule of Basic and Diluted Loss Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996037 - Disclosure - Net Loss per Share - Schedule of Diluted Net Loss Per Share Attributable to Stockholders (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofDilutedNetLossPerShareAttributabletoStockholdersTable</Role>
      <ShortName>Net Loss per Share - Schedule of Diluted Net Loss Per Share Attributable to Stockholders (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996038 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/SubsequentEvents</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996039 - Disclosure - Summary of Significant Accounting Policies - Schedule of Consolidated Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofConsolidatedBalanceSheetTable</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Consolidated Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996040 - Disclosure - Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofLiabilitiesMeasuredatFairValueonaRecurringBasisTable0</Role>
      <ShortName>Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>996041 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measurements of the Private Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFairValueMeasurementsofthePrivateWarrantLiabilityTable0</Role>
      <ShortName>Fair Value Measurements - Schedule of Fair Value Measurements of the Private Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>996042 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measurements of the Forward Purchase Agreement Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFairValueMeasurementsoftheForwardPurchaseAgreementWarrantLiabilityTable0</Role>
      <ShortName>Fair Value Measurements - Schedule of Fair Value Measurements of the Forward Purchase Agreement Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996043 - Disclosure - Fair Value Measurements - Schedule of Instruments Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofInstrumentsMeasuredatFairValueonaRecurringBasisTable</Role>
      <ShortName>Fair Value Measurements - Schedule of Instruments Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996044 - Disclosure - Inventories - Schedule of Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofInventoriesTable0</Role>
      <ShortName>Inventories - Schedule of Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996045 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofPropertyandEquipmentTable</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996046 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofAccruedExpensesTable0</Role>
      <ShortName>Accrued Expenses - Schedule of Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996047 - Disclosure - Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/OperatingLeasesDetails</Role>
      <ShortName>Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/OperatingLeasesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996048 - Disclosure - Operating Leases - Schedule of Components of Leases and Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofComponentsofLeasesandLeaseCostsTable</Role>
      <ShortName>Operating Leases - Schedule of Components of Leases and Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996049 - Disclosure - Operating Leases - Schedule of Future Minimum Lease Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFutureMinimumLeasePaymentsTable</Role>
      <ShortName>Operating Leases - Schedule of Future Minimum Lease Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996050 - Disclosure - Product Warranty Liability - Schedule of Changes in Warranty Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofChangesinWarrantyLiabilityTable</Role>
      <ShortName>Product Warranty Liability - Schedule of Changes in Warranty Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996051 - Disclosure - Debt (Related Party) and Interest Expense (Related Party) - Schedule of Black-Scholes Option Model (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofBlackScholesOptionModelTable</Role>
      <ShortName>Debt (Related Party) and Interest Expense (Related Party) - Schedule of Black-Scholes Option Model (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996052 - Disclosure - Debt (Related Party) and Interest Expense (Related Party) - Schedule of Valuation of Term Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyDetailsScheduleofValuationofTermLoans</Role>
      <ShortName>Debt (Related Party) and Interest Expense (Related Party) - Schedule of Valuation of Term Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/DebtRelatedPartyandInterestExpenseRelatedPartyTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996053 - Disclosure - Common Stock - Schedule of Outstanding Warrant Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofOutstandingWarrantActivityTable0</Role>
      <ShortName>Common Stock - Schedule of Outstanding Warrant Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>996054 - Disclosure - Common Stock - Schedule of Fair Value Measurements of Forward Purchase Agreement Warrant Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofFairValueMeasurementsofForwardPurchaseAgreementWarrantLiabilityTable</Role>
      <ShortName>Common Stock - Schedule of Fair Value Measurements of Forward Purchase Agreement Warrant Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>996055 - Disclosure - Stock-Based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/StockBasedCompensationDetails</Role>
      <ShortName>Stock-Based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>996056 - Disclosure - Stock-Based Compensation - Schedule of Black-Scholes Option Model to Estimate the Fair Value of Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofBlackScholesOptionModeltoEstimatetheFairValueofStockOptionsTable</Role>
      <ShortName>Stock-Based Compensation - Schedule of Black-Scholes Option Model to Estimate the Fair Value of Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>996057 - Disclosure - Stock-Based Compensation - Schedule of Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofStockOptionActivityTable</Role>
      <ShortName>Stock-Based Compensation - Schedule of Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>996058 - Disclosure - Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofStockBasedCompensationExpenseTable</Role>
      <ShortName>Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>996059 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.anzuspac.com/role/IncomeTaxesTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>996060 - Disclosure - Income Taxes - Schedule of Provision for (Benefit from) Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofProvisionforBenefitfromIncomeTaxesTable</Role>
      <ShortName>Income Taxes - Schedule of Provision for (Benefit from) Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>996061 - Disclosure - Income Taxes - Schedule of Components of the Benefit from Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofComponentsoftheBenefitfromIncomeTaxesTable</Role>
      <ShortName>Income Taxes - Schedule of Components of the Benefit from Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>996062 - Disclosure - Income Taxes - Schedule of Effective Tax Rates and the U.S. Federal Statutory Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofEffectiveTaxRatesandtheUSFederalStatutoryTaxRateTable</Role>
      <ShortName>Income Taxes - Schedule of Effective Tax Rates and the U.S. Federal Statutory Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>996063 - Disclosure - Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofComponentsofDeferredTaxAssetsandLiabilitiesTable</Role>
      <ShortName>Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>996064 - Disclosure - Income Taxes - Schedule of Reconciliation of Tax Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofReconciliationofTaxContingenciesTable</Role>
      <ShortName>Income Taxes - Schedule of Reconciliation of Tax Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>996065 - Disclosure - Segment Reporting - Schedule of Significant Expense Categories Regularly Reviewed by the CODM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofSignificantExpenseCategoriesRegularlyReviewedbytheCODMTable0</Role>
      <ShortName>Segment Reporting - Schedule of Significant Expense Categories Regularly Reviewed by the CODM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>996066 - Disclosure - Net Loss per Share - ​Schedule of Basic and Diluted Loss Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofBasicandDilutedLossPerShareTable0</Role>
      <ShortName>Net Loss per Share - ​Schedule of Basic and Diluted Loss Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ea0293367-posam_envoy.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>996067 - Disclosure - Net Loss per Share - Schedule of Diluted Net Loss Per Share Attributable to Stockholders (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.anzuspac.com/role/ScheduleofDilutedNetLossPerShareAttributabletoStockholdersTable0</Role>
      <ShortName>Net Loss per Share - Schedule of Diluted Net Loss Per Share Attributable to Stockholders (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>coch-20260331.xsd</File>
    <File>coch-20260331_cal.xml</File>
    <File>coch-20260331_def.xml</File>
    <File>coch-20260331_lab.xml</File>
    <File>coch-20260331_pre.xml</File>
    <File doctype="POS AM" isDefinitelyFs="true" isUsgaap="true" original="ea0293367-posam_envoy.htm">ea0293367-posam_envoy.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ea029336701_img1.jpg</File>
    <File>ea029336701_img2.jpg</File>
    <File>ea029336701_img3.jpg</File>
    <File>ea029336701_img4.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2026</BaseTaxonomy>
    <BaseTaxonomy items="1701">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="10">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
