<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>635</ContextCount>
  <ElementCount>600</ElementCount>
  <EntityCount>2</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>143</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1002 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005 - Statement - Condensed Consolidated Statements of Operations (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedStatementsOfOperationsParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Operations (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1006 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Deficit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedStatementsOfChangesInShareholdersDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Shareholders' Deficit</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1007 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Deficit  (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedStatementsOfChangesInShareholdersDeficitParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Shareholders' Deficit  (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1008 - Statement - Condensed consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>99554.2 - Disclosure - S-K 1602, SPAC Registered Offerings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602</Role>
      <ShortName>S-K 1602, SPAC Registered Offerings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>99554.2.2.6 - Disclosure - S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1602b6</Role>
      <ShortName>S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>99554.3.1 - Disclosure - S-K 1603(a) SPAC Sponsor</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/spac/role/sk1603a</Role>
      <ShortName>S-K 1603(a) SPAC Sponsor</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>999001 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>999002 - Disclosure - Description of Organization and Business Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/DescriptionOfOrganizationAndBusinessOperations</Role>
      <ShortName>Description of Organization and Business Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>999003 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>999004 - Disclosure - Business Combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombination</Role>
      <ShortName>Business Combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>999005 - Disclosure - Initial Public Offering</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/InitialPublicOffering</Role>
      <ShortName>Initial Public Offering</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>999006 - Disclosure - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IntangibleAssets</Role>
      <ShortName>Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>999007 - Disclosure - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/Goodwill</Role>
      <ShortName>Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>999008 - Disclosure - Private Placement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PrivatePlacement</Role>
      <ShortName>Private Placement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>999009 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>999010 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>999011 - Disclosure - Prepaid Expenses and Other Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PrepaidExpensesAndOtherCurrentAssets</Role>
      <ShortName>Prepaid Expenses and Other Current Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>999012 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>999013 - Disclosure - Shareholder's Deficit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ShareholderSDeficit</Role>
      <ShortName>Shareholder's Deficit</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>999014 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>999015 - Disclosure - Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/AccruedLiabilities</Role>
      <ShortName>Accrued Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>999016 - Disclosure - SAFE Notes</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ch.com/role/SafeNotes</Role>
      <ShortName>SAFE Notes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>999017 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>999018 - Disclosure - Convertible Redeemable Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ConvertibleRedeemablePreferredStock</Role>
      <ShortName>Convertible Redeemable Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>999019 - Disclosure - Common Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommonStock</Role>
      <ShortName>Common Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>999020 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>999021 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>999022 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>999023 - Disclosure - Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LossPerShare</Role>
      <ShortName>Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>999024 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>999025 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>999026 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.ch.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>999027 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>999028 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/RevenueRecognition</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>999029 - Disclosure - Business Combination (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombinationTables</Role>
      <ShortName>Business Combination (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/BusinessCombination</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>999030 - Disclosure - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IntangibleAssetsTables</Role>
      <ShortName>Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/IntangibleAssets</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>999031 - Disclosure - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/GoodwillTables</Role>
      <ShortName>Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/Goodwill</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>999032 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/Inventories</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>999033 - Disclosure - Prepaid Expenses and Other Current Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PrepaidExpensesAndOtherCurrentAssetsTables</Role>
      <ShortName>Prepaid Expenses and Other Current Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/PrepaidExpensesAndOtherCurrentAssets</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>999034 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/PropertyAndEquipmentNet</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>999035 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/FairValueMeasurements</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>999036 - Disclosure - Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/AccruedLiabilitiesTables</Role>
      <ShortName>Accrued Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/AccruedLiabilities</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>999037 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>999038 - Disclosure - Convertible Redeemable Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ConvertibleRedeemablePreferredStockTables</Role>
      <ShortName>Convertible Redeemable Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/ConvertibleRedeemablePreferredStock</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>999039 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/StockBasedCompensation</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>999040 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/IncomeTaxes</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>999041 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/Leases</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>999042 - Disclosure - Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LossPerShareTables</Role>
      <ShortName>Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/LossPerShare</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>999043 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ch.com/role/SegmentInformation</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>999044 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>999045 - Disclosure - Summary of Significant Accounting Policies - Schedule of Class A ordinary shares subject to possible redemption (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfClassAOrdinarySharesSubjectToPossibleRedemptionDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Class A ordinary shares subject to possible redemption (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>999046 - Disclosure - Summary of Significant Accounting Policies - Schedule of calculation of basic and diluted net income (loss)  per ordinary share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfCalculationOfBasicAndDilutedNetIncomeLossPerOrdinaryShareDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of calculation of basic and diluted net income (loss)  per ordinary share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>999047 - Disclosure - Summary of Significant Accounting Policies - Schedule of depreciation and amortization expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfDepreciationAndAmortizationExpenseDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of depreciation and amortization expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>999048 - Disclosure - Summary of Significant Accounting Policies - Schedule of fair value of financial instruments that were measured at fair value on a recurring basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfFairValueOfFinancialInstrumentsThatWereMeasuredAtFairValueOnARecurringBasisDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of fair value of financial instruments that were measured at fair value on a recurring basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>999049 - Disclosure - Summary of Operations and Significant Accounting Policies - Consolidated Balance Sheet (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfOperationsAndSignificantAccountingPoliciesConsolidatedBalanceSheetDetail</Role>
      <ShortName>Summary of Operations and Significant Accounting Policies - Consolidated Balance Sheet (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>999050 - Disclosure - Summary of Operations and Significant Accounting Policies - Consolidated Statements of Operations and Comprehensive Loss (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfOperationsAndSignificantAccountingPoliciesConsolidatedStatementsOfOperationsAndComprehensiveLossDetail</Role>
      <ShortName>Summary of Operations and Significant Accounting Policies - Consolidated Statements of Operations and Comprehensive Loss (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>999051 - Disclosure - Summary of Operations and Significant Accounting Policies - Consolidated Statements of Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SummaryOfOperationsAndSignificantAccountingPoliciesConsolidatedStatementsOfCashFlowsDetail</Role>
      <ShortName>Summary of Operations and Significant Accounting Policies - Consolidated Statements of Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>999052 - Disclosure - Description of Organization and Business Operations - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/DescriptionOfOrganizationAndBusinessOperationsAdditionalInformationDetail</Role>
      <ShortName>Description of Organization and Business Operations - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>999053 - Disclosure - Revenue Recognition - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RevenueRecognitionAdditionalInformationDetail</Role>
      <ShortName>Revenue Recognition - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>999054 - Disclosure - Revenue Recognition - Schedule of disaggregation of revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RevenueRecognitionScheduleOfDisaggregationOfRevenueDetails</Role>
      <ShortName>Revenue Recognition - Schedule of disaggregation of revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>999055 - Disclosure - Revenue Recognition - Schedule of reconciliation of beginning and ending balances of unbilled receivables and contract liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RevenueRecognitionScheduleOfReconciliationOfBeginningAndEndingBalancesOfUnbilledReceivablesAndContractLiabilitiesDetail</Role>
      <ShortName>Revenue Recognition - Schedule of reconciliation of beginning and ending balances of unbilled receivables and contract liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>999056 - Disclosure - Business Combination - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombinationAdditionalInformationDetails</Role>
      <ShortName>Business Combination - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>999057 - Disclosure - Business Combination - Schedule of business combination recognized identifiable intangiable assets acquired (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombinationScheduleOfBusinessCombinationRecognizedIdentifiableIntangiableAssetsAcquiredDetails</Role>
      <ShortName>Business Combination - Schedule of business combination recognized identifiable intangiable assets acquired (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>999058 - Disclosure - Business Combination - Schedule of business combination recognized identifiable non current assets acquired (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombinationScheduleOfBusinessCombinationRecognizedIdentifiableNonCurrentAssetsAcquiredDetails</Role>
      <ShortName>Business Combination - Schedule of business combination recognized identifiable non current assets acquired (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>999059 - Disclosure - Business Combination - Schedule of business combination recognized identifiable assets acquired and liabilities assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/BusinessCombinationScheduleOfBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Business Combination - Schedule of business combination recognized identifiable assets acquired and liabilities assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>999060 - Disclosure - Initial Public Offering - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/InitialPublicOfferingAdditionalInformationDetail</Role>
      <ShortName>Initial Public Offering - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>999061 - Disclosure - Intangible Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IntangibleAssetsAdditionalInformationDetail</Role>
      <ShortName>Intangible Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>999062 - Disclosure - Intangible Assets - Schedule of Intangible asset balances and accumulated amortization (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IntangibleAssetsScheduleOfIntangibleAssetBalancesAndAccumulatedAmortizationDetail</Role>
      <ShortName>Intangible Assets - Schedule of Intangible asset balances and accumulated amortization (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>999063 - Disclosure - Intangible Assets - Schedule of Estimated amortization expense on intangible assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IntangibleAssetsScheduleOfEstimatedAmortizationExpenseOnIntangibleAssetsDetail</Role>
      <ShortName>Intangible Assets - Schedule of Estimated amortization expense on intangible assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>999064 - Disclosure - Goodwill - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/GoodwillAdditionalInformationDetails</Role>
      <ShortName>Goodwill - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>999065 - Disclosure - Goodwill - Schedule of Changes in the carrying amount of goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/GoodwillScheduleOfChangesInTheCarryingAmountOfGoodwillDetails</Role>
      <ShortName>Goodwill - Schedule of Changes in the carrying amount of goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>999066 - Disclosure - Private Placement - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PrivatePlacementAdditionalInformationDetail</Role>
      <ShortName>Private Placement - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>999067 - Disclosure - Inventories - Schedule of Major classifications of inventories (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/InventoriesScheduleOfMajorClassificationsOfInventoriesDetail</Role>
      <ShortName>Inventories - Schedule of Major classifications of inventories (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>999068 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/RelatedPartyTransactionsAdditionalInformationDetail</Role>
      <ShortName>Related Party Transactions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>999069 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetail</Role>
      <ShortName>Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>999070 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetail</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>999071 - Disclosure - Property and Equipment, Net - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNetAdditionalInformationDetail</Role>
      <ShortName>Property and Equipment, Net - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>999072 - Disclosure - Property and Equipment, Net - Schedule of Accumulated Depreciation Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNetScheduleOfAccumulatedDepreciationExpenseDetail</Role>
      <ShortName>Property and Equipment, Net - Schedule of Accumulated Depreciation Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>999073 - Disclosure - Property and Equipment, Net - Schedule of Schedule of Long-lived assets by geographic area (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/PropertyAndEquipmentNetScheduleOfScheduleOfLongLivedAssetsByGeographicAreaDetail</Role>
      <ShortName>Property and Equipment, Net - Schedule of Schedule of Long-lived assets by geographic area (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>999074 - Disclosure - Shareholder's Deficit - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ShareholderSDeficitAdditionalInformationDetail</Role>
      <ShortName>Shareholder's Deficit - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>999075 - Disclosure - Fair Value Measurements - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsAdditionalInformationDetails</Role>
      <ShortName>Fair Value Measurements - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>999076 - Disclosure - Fair Value Measurements - Schedule of assets held in the Trust Account (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsScheduleOfAssetsHeldInTheTrustAccountDetail</Role>
      <ShortName>Fair Value Measurements - Schedule of assets held in the Trust Account (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>999077 - Disclosure - Fair Value Measurements - Schedule of liabilities held in the Trust Account (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsScheduleOfLiabilitiesHeldInTheTrustAccountDetail</Role>
      <ShortName>Fair Value Measurements - Schedule of liabilities held in the Trust Account (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>999078 - Disclosure - Fair Value Measurements - Summary of the key inputs into the PWERM model (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsSummaryOfTheKeyInputsIntoThePwermModelDetail</Role>
      <ShortName>Fair Value Measurements - Summary of the key inputs into the PWERM model (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>999079 - Disclosure - Fair Value Measurements - Schedule of quantitative information regarding market assumptions (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsScheduleOfQuantitativeInformationRegardingMarketAssumptionsDetail</Role>
      <ShortName>Fair Value Measurements - Schedule of quantitative information regarding market assumptions (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>999080 - Disclosure - Fair Value Measurements - Summary of the Subscription Agreement Liability (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/FairValueMeasurementsSummaryOfTheSubscriptionAgreementLiabilityDetail</Role>
      <ShortName>Fair Value Measurements - Summary of the Subscription Agreement Liability (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>999081 - Disclosure - Accrued Liabilities - Schedule of Accrued Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/AccruedLiabilitiesScheduleOfAccruedLiabilitiesDetail</Role>
      <ShortName>Accrued Liabilities - Schedule of Accrued Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>999082 - Disclosure - SAFE Notes -  Additional Information (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ch.com/role/SafeNotesAdditionalInformationDetail</Role>
      <ShortName>SAFE Notes -  Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>999083 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommitmentsAndContingenciesAdditionalInformationDetail</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>999084 - Disclosure - Commitments and Contingencies -  Summary of the fair value of the BTIG founder shares (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommitmentsAndContingenciesSummaryOfTheFairValueOfTheBtigFounderSharesDetail</Role>
      <ShortName>Commitments and Contingencies -  Summary of the fair value of the BTIG founder shares (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>999085 - Disclosure - Convertible Redeemable Preferred Stock - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ConvertibleRedeemablePreferredStockAdditionalInformationDetail</Role>
      <ShortName>Convertible Redeemable Preferred Stock - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>999086 - Disclosure - Convertible Redeemable Preferred Stock - Schedule of Company's convertible redeemable preferred stock (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/ConvertibleRedeemablePreferredStockScheduleOfCompanySConvertibleRedeemablePreferredStockDetail</Role>
      <ShortName>Convertible Redeemable Preferred Stock - Schedule of Company's convertible redeemable preferred stock (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>999087 - Disclosure - Common Stock - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/CommonStockAdditionalInformationDetail</Role>
      <ShortName>Common Stock - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>999088 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationAdditionalInformationDetail</Role>
      <ShortName>Stock-Based Compensation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>999089 - Disclosure - Stock-Based Compensation - Summary of Company's stock option activity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationSummaryOfCompanySStockOptionActivityDetail</Role>
      <ShortName>Stock-Based Compensation - Summary of Company's stock option activity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>999090 - Disclosure - Stock-Based Compensation - Summary of Estimate the fair value of stock options granted (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationSummaryOfEstimateTheFairValueOfStockOptionsGrantedDetail</Role>
      <ShortName>Stock-Based Compensation - Summary of Estimate the fair value of stock options granted (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>999091 - Disclosure - Stock-Based Compensation - Summary of the restricted stock awards (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationSummaryOfTheRestrictedStockAwardsDetail</Role>
      <ShortName>Stock-Based Compensation - Summary of the restricted stock awards (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>999092 - Disclosure - Stock-Based Compensation - Summary of Total stock-based compensation expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/StockBasedCompensationSummaryOfTotalStockBasedCompensationExpenseDetail</Role>
      <ShortName>Stock-Based Compensation - Summary of Total stock-based compensation expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>999093 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxesAdditionalInformationDetail</Role>
      <ShortName>Income Taxes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>999094 - Disclosure - Income Taxes - Schedule of income (loss) before taxes and the expense (benefit) for income taxes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxesScheduleOfIncomeLossBeforeTaxesAndTheExpenseBenefitForIncomeTaxesDetail</Role>
      <ShortName>Income Taxes - Schedule of income (loss) before taxes and the expense (benefit) for income taxes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>999095 - Disclosure - Income Taxes - Schedule of statutory income tax rate to the pre-tax loss before income taxes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxesScheduleOfStatutoryIncomeTaxRateToThePreTaxLossBeforeIncomeTaxesDetail</Role>
      <ShortName>Income Taxes - Schedule of statutory income tax rate to the pre-tax loss before income taxes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>999096 - Disclosure - Income Taxes - Schedule of Significant components of the Company's deferred tax assets and liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/IncomeTaxesScheduleOfSignificantComponentsOfTheCompanySDeferredTaxAssetsAndLiabilitiesDetail</Role>
      <ShortName>Income Taxes - Schedule of Significant components of the Company's deferred tax assets and liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>999097 - Disclosure - Leases - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LeasesAdditionalInformationDetail</Role>
      <ShortName>Leases - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>999098 - Disclosure - Leases - Schedule of Weighted average remaining lease terms and discount rates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LeasesScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesDetail</Role>
      <ShortName>Leases - Schedule of Weighted average remaining lease terms and discount rates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>999099 - Disclosure - Leases - Schedule of undiscounted future minimum lease payments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LeasesScheduleOfUndiscountedFutureMinimumLeasePaymentsDetail</Role>
      <ShortName>Leases - Schedule of undiscounted future minimum lease payments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>999100 - Disclosure - Loss Per Share - Schedule of outstanding shares of potentially dilutive securities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LossPerShareScheduleOfOutstandingSharesOfPotentiallyDilutiveSecuritiesDetail</Role>
      <ShortName>Loss Per Share - Schedule of outstanding shares of potentially dilutive securities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>999101 - Disclosure - Loss Per Share - Schedule of computation of basic net loss per share attributable to common stockholders (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/LossPerShareScheduleOfComputationOfBasicNetLossPerShareAttributableToCommonStockholdersDetail</Role>
      <ShortName>Loss Per Share - Schedule of computation of basic net loss per share attributable to common stockholders (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>999102 - Disclosure - Segment Information - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SegmentInformationAdditionalInformationDetail</Role>
      <ShortName>Segment Information - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>999103 - Disclosure - Segment Information - Schedule of Segment Reporting Information used by CODM (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SegmentInformationScheduleOfSegmentReportingInformationUsedByCodmDetail</Role>
      <ShortName>Segment Information - Schedule of Segment Reporting Information used by CODM (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="d22517ds4.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>999104 - Disclosure - Subsequent Events - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ch.com/role/SubsequentEventsAdditionalInformationDetail</Role>
      <ShortName>Subsequent Events - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="d22517dexfilingfees.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>995210 - Document - Submission</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/submissionTable</Role>
      <ShortName>Submission</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="d22517dexfilingfees.htm">
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>995211 - Document - Offerings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/feesOfferingTable</Role>
      <ShortName>Offerings</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="d22517dexfilingfees.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>995215 - Document - Fees Summary</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ffd/role/document/feesSummaryTable</Role>
      <ShortName>Fees Summary</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>cccxu-20250930.xsd</File>
    <File doctype="S-4" isDefinitelyFs="true" isUsgaap="true" original="d22517ds4.htm">d22517ds4.htm</File>
    <File doctype="EX-FILING FEES" original="d22517dexfilingfees.htm">d22517dexfilingfees.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g22517g00t01.jpg</File>
    <File>g22517g00t02.jpg</File>
    <File>g22517g00v01.jpg</File>
    <File>g22517g00v02.jpg</File>
    <File>g22517g10w91.jpg</File>
    <File>g22517g82v61.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2246">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="68">http://xbrl.sec.gov/ffd/2025</BaseTaxonomy>
    <BaseTaxonomy items="12">http://xbrl.sec.gov/spac/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
