<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>185</ContextCount>
  <ElementCount>342</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>54</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>11</UnitCount>
  <MyReports>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000100 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>010000 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>010100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>020000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>030000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME / (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME / (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>040000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY / (DEFICIT)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedStatementsOfChangesInStockholdersEquityDeficit</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY / (DEFICIT)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>050000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>060100 - Disclosure - Basis of presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BasisOfPresentation</Role>
      <ShortName>Basis of presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>060200 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>060300 - Disclosure - Business Combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BusinessCombination</Role>
      <ShortName>Business Combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>060400 - Disclosure - Related party disclosures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RelatedPartyDisclosures</Role>
      <ShortName>Related party disclosures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>060500 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>060600 - Disclosure - Prepaid expenses and Other current assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PrepaidExpensesAndOtherCurrentAssets</Role>
      <ShortName>Prepaid expenses and Other current assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>060700 - Disclosure - Property and equipment, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PropertyAndEquipmentNet</Role>
      <ShortName>Property and equipment, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>060800 - Disclosure - Other non-current assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherNoncurrentAssets</Role>
      <ShortName>Other non-current assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>060900 - Disclosure - Trade and other payables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/TradeAndOtherPayables</Role>
      <ShortName>Trade and other payables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>061000 - Disclosure - Other current liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherCurrentLiabilities</Role>
      <ShortName>Other current liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>061100 - Disclosure - Other long-term liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherLongtermLiabilities</Role>
      <ShortName>Other long-term liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>061200 - Disclosure - Private Placement Warrants and Working Capital Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PrivatePlacementWarrantsAndWorkingCapitalWarrants</Role>
      <ShortName>Private Placement Warrants and Working Capital Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>061300 - Disclosure - Stockholders' Equity / (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficit</Role>
      <ShortName>Stockholders' Equity / (Deficit)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>061400 - Disclosure - Revenue, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RevenueNet</Role>
      <ShortName>Revenue, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>061500 - Disclosure - Fair value measurement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/FairValueMeasurement</Role>
      <ShortName>Fair value measurement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>061600 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>061700 - Disclosure - Commitments and contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>061800 - Disclosure - Net income / (loss) per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/NetIncomeLossPerShare</Role>
      <ShortName>Net income / (loss) per share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>061900 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>070100 - Disclosure - Basis of presentation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BasisOfPresentationPolicies</Role>
      <ShortName>Basis of presentation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://amcigroup.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>070200 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://amcigroup.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>080200 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>080300 - Disclosure - Business Combination (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BusinessCombinationTables</Role>
      <ShortName>Business Combination (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/BusinessCombination</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>080400 - Disclosure - Related party disclosures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RelatedPartyDisclosuresTables</Role>
      <ShortName>Related party disclosures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/RelatedPartyDisclosures</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>080500 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/Inventories</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>080600 - Disclosure - Prepaid expenses and Other current assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PrepaidExpensesAndOtherCurrentAssetsTables</Role>
      <ShortName>Prepaid expenses and Other current assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/PrepaidExpensesAndOtherCurrentAssets</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>080900 - Disclosure - Trade and other payables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/TradeAndOtherPayablesTables</Role>
      <ShortName>Trade and other payables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/TradeAndOtherPayables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>081000 - Disclosure - Other current liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherCurrentLiabilitiesTables</Role>
      <ShortName>Other current liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/OtherCurrentLiabilities</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>081300 - Disclosure - Stockholders' Equity / (Deficit) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficitTables</Role>
      <ShortName>Stockholders' Equity / (Deficit) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/StockholdersEquityDeficit</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>081400 - Disclosure - Revenue, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RevenueNetTables</Role>
      <ShortName>Revenue, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/RevenueNet</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>081800 - Disclosure - Net income / (loss) per share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/NetIncomeLossPerShareTables</Role>
      <ShortName>Net income / (loss) per share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://amcigroup.com/role/NetIncomeLossPerShare</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>090100 - Disclosure - Basis of presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BasisOfPresentationDetails</Role>
      <ShortName>Basis of presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/BasisOfPresentationPolicies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>090200 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>090300 - Disclosure - Business Combination, AMCI Acquisition Corp (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BusinessCombinationAmciAcquisitionCorpDetails</Role>
      <ShortName>Business Combination, AMCI Acquisition Corp (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>090302 - Disclosure - Business Combination, UltraCell LLC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BusinessCombinationUltracellLlcDetails</Role>
      <ShortName>Business Combination, UltraCell LLC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>090304 - Disclosure - Business Combination, SerEnergy and FES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/BusinessCombinationSerenergyAndFesDetails</Role>
      <ShortName>Business Combination, SerEnergy and FES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>090400 - Disclosure - Related party disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RelatedPartyDisclosuresDetails</Role>
      <ShortName>Related party disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/RelatedPartyDisclosuresTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>090500 - Disclosure - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/InventoriesDetails</Role>
      <ShortName>Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/InventoriesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>090600 - Disclosure - Prepaid expenses and Other current assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PrepaidExpensesAndOtherCurrentAssetsDetails</Role>
      <ShortName>Prepaid expenses and Other current assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/PrepaidExpensesAndOtherCurrentAssetsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>090700 - Disclosure - Property and equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PropertyAndEquipmentNetDetails</Role>
      <ShortName>Property and equipment, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/PropertyAndEquipmentNet</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>090800 - Disclosure - Other non-current assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherNoncurrentAssetsDetails</Role>
      <ShortName>Other non-current assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/OtherNoncurrentAssets</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>090900 - Disclosure - Trade and other payables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/TradeAndOtherPayablesDetails</Role>
      <ShortName>Trade and other payables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/TradeAndOtherPayablesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>091000 - Disclosure - Other current liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherCurrentLiabilitiesDetails</Role>
      <ShortName>Other current liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/OtherCurrentLiabilitiesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>091100 - Disclosure - Other long-term liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/OtherLongtermLiabilitiesDetails</Role>
      <ShortName>Other long-term liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/OtherLongtermLiabilities</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>091200 - Disclosure - Private Placement Warrants and Working Capital Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/PrivatePlacementWarrantsAndWorkingCapitalWarrantsDetails</Role>
      <ShortName>Private Placement Warrants and Working Capital Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/PrivatePlacementWarrantsAndWorkingCapitalWarrants</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>091300 - Disclosure - Stockholders' Equity / (Deficit), Shares Authorized and Common Stock, Public Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficitSharesAuthorizedAndCommonStockPublicWarrantsDetails</Role>
      <ShortName>Stockholders' Equity / (Deficit), Shares Authorized and Common Stock, Public Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/StockholdersEquityDeficitTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>091302 - Disclosure - Stockholders' Equity / (Deficit), Compensation Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficitCompensationPlansDetails</Role>
      <ShortName>Stockholders' Equity / (Deficit), Compensation Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/StockholdersEquityDeficitTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>091304 - Disclosure - Stockholders' Equity / (Deficit), Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficitStockOptionsDetails</Role>
      <ShortName>Stockholders' Equity / (Deficit), Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/StockholdersEquityDeficitTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>091306 - Disclosure - Stockholders' Equity / (Deficit), Restricted Stock Units and Stock Grant Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/StockholdersEquityDeficitRestrictedStockUnitsAndStockGrantPlansDetails</Role>
      <ShortName>Stockholders' Equity / (Deficit), Restricted Stock Units and Stock Grant Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/StockholdersEquityDeficitTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>091400 - Disclosure - Revenue, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/RevenueNetDetails</Role>
      <ShortName>Revenue, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/RevenueNetTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>091700 - Disclosure - Commitments and contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="brhc10030800_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>091800 - Disclosure - Net income / (loss) per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://amcigroup.com/role/NetIncomeLossPerShareDetails</Role>
      <ShortName>Net income / (loss) per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://amcigroup.com/role/NetIncomeLossPerShareTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" original="brhc10030800_10q.htm">brhc10030800_10q.htm</File>
    <File>adn-20210930.xsd</File>
    <File>adn-20210930_cal.xml</File>
    <File>adn-20210930_def.xml</File>
    <File>adn-20210930_lab.xml</File>
    <File>adn-20210930_pre.xml</File>
    <File>brhc10030800_ex31-1.htm</File>
    <File>brhc10030800_ex31-2.htm</File>
    <File>brhc10030800_ex32-1.htm</File>
    <File>brhc10030800_ex32-2.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2021-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
