<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.7.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>306</ContextCount>
  <ElementCount>529</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>94</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Consolidated Statements of Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedStatementsOfIncomeLoss</Role>
      <ShortName>Consolidated Statements of Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002501 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1003501 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1004000 - Statement - Consolidated Statements of Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedStatementsOfShareholdersEquity</Role>
      <ShortName>Consolidated Statements of Shareholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1005000 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Effect of New Accounting Standards</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EffectOfNewAccountingStandards</Role>
      <ShortName>Effect of New Accounting Standards</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Marketable Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/MarketableSecurities</Role>
      <ShortName>Marketable Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Inventory</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/Inventory</Role>
      <ShortName>Inventory</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Property and Equipment, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PropertyAndEquipmentNet</Role>
      <ShortName>Property and Equipment, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/Acquisitions</Role>
      <ShortName>Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Goodwill and Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/GoodwillAndIntangibleAssets</Role>
      <ShortName>Goodwill and Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Long-Term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermDebt</Role>
      <ShortName>Long-Term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Long-Term Related Party Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayable</Role>
      <ShortName>Long-Term Related Party Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Post-Retirement Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlans</Role>
      <ShortName>Post-Retirement Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Other Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilities</Role>
      <ShortName>Other Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - Contingent Liabilities and Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitments</Role>
      <ShortName>Contingent Liabilities and Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Equity Instruments and Stock Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensation</Role>
      <ShortName>Equity Instruments and Stock Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Earnings (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EarningsLossPerShare</Role>
      <ShortName>Earnings (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2117100 - Disclosure - Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ComprehensiveIncomeLoss</Role>
      <ShortName>Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2118100 - Disclosure - Company Operations by Product, Customer and Geographic Area</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicArea</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperations</Role>
      <ShortName>Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2120100 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2121100 - Disclosure - Subsequent Event</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SubsequentEvent</Role>
      <ShortName>Subsequent Event</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2122100 - Schedule - Schedule II - Valuation and Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ScheduleIiValuationAndQualifyingAccounts</Role>
      <ShortName>Schedule II - Valuation and Qualifying Accounts</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Marketable Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/MarketableSecuritiesTables</Role>
      <ShortName>Marketable Securities (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Inventory (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/InventoryTables</Role>
      <ShortName>Inventory (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Property and Equipment, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PropertyAndEquipmentNetTables</Role>
      <ShortName>Property and Equipment, net (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/AcquisitionsTables</Role>
      <ShortName>Acquisitions (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Goodwill and Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/GoodwillAndIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Intangible Assets (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Long-Term Related Party Payable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayableTables</Role>
      <ShortName>Long-Term Related Party Payable (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Post-Retirement Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlansTables</Role>
      <ShortName>Post-Retirement Benefit Plans (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - Other Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilitiesTables</Role>
      <ShortName>Other Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2314301 - Disclosure - Contingent Liabilities and Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitmentsTables</Role>
      <ShortName>Contingent Liabilities and Commitments (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2315301 - Disclosure - Equity Instruments and Stock Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationTables</Role>
      <ShortName>Equity Instruments and Stock Based Compensation (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Earnings (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EarningsLossPerShareTables</Role>
      <ShortName>Earnings (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2317301 - Disclosure - Comprehensive Income (Loss) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ComprehensiveIncomeLossTables</Role>
      <ShortName>Comprehensive Income (Loss) (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2318301 - Disclosure - Company Operations by Product, Customer and Geographic Area (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicAreaTables</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2319301 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperationsTables</Role>
      <ShortName>Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - Summary of Significant Accounting Policies - Income Statement Restatements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesIncomeStatementRestatementsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Income Statement Restatements (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - Summary of Significant Accounting Policies - Balance Sheet Restatements and Reclassifications (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesBalanceSheetRestatementsAndReclassificationsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Balance Sheet Restatements and Reclassifications (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2401405 - Disclosure - Summary of Significant Accounting Policies - Restatement and Reclassification Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesRestatementAndReclassificationNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Restatement and Reclassification Narrative (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2401406 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment Useful Lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentUsefulLivesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Property and Equipment Useful Lives (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2401407 - Disclosure - Summary of Significant Accounting Policies - Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesRevenueDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Revenue (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2401408 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Narrative (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2402401 - Disclosure - Effect of New Accounting Standards (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EffectOfNewAccountingStandardsDetailsTextual</Role>
      <ShortName>Effect of New Accounting Standards (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Fair Value Measurements - Measured on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/FairValueMeasurementsMeasuredOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements - Measured on Recurring Basis (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Marketable Securities - Summary of Marketable Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/MarketableSecuritiesSummaryOfMarketableSecuritiesDetails</Role>
      <ShortName>Marketable Securities - Summary of Marketable Securities (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - Marketable Securities - Schedule of Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/MarketableSecuritiesScheduleOfMaturitiesDetails</Role>
      <ShortName>Marketable Securities - Schedule of Maturities (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/InventoryDetails</Role>
      <ShortName>Inventory (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Property and Equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PropertyAndEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, net (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - Acquisitions - Purchase Price Allocation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/AcquisitionsPurchasePriceAllocationDetails</Role>
      <ShortName>Acquisitions - Purchase Price Allocation (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Acquisitions - Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/AcquisitionsProFormaInformationDetails</Role>
      <ShortName>Acquisitions - Pro Forma Information (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2407404 - Disclosure - Acquisitions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/AcquisitionsDetailsTextual</Role>
      <ShortName>Acquisitions (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Goodwill and Intangible Assets - Net Book Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/GoodwillAndIntangibleAssetsNetBookValueDetails</Role>
      <ShortName>Goodwill and Intangible Assets - Net Book Value (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - Goodwill and Intangible Assets - Estimate Future Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/GoodwillAndIntangibleAssetsEstimateFutureAmortizationDetails</Role>
      <ShortName>Goodwill and Intangible Assets - Estimate Future Amortization (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Goodwill and Intangible Assets (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/GoodwillAndIntangibleAssetsDetailsTextual</Role>
      <ShortName>Goodwill and Intangible Assets (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2409401 - Disclosure - Long-Term Debt (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermDebtDetailsTextual</Role>
      <ShortName>Long-Term Debt (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Long-Term Related Party Payable - Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayableActivityDetails</Role>
      <ShortName>Long-Term Related Party Payable - Activity (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Long-Term Related Party Payable - Warrant Fair Value Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayableWarrantFairValueAssumptionsDetails</Role>
      <ShortName>Long-Term Related Party Payable - Warrant Fair Value Assumptions (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Long-Term Related Party Payable - Payable Balance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayablePayableBalanceDetails</Role>
      <ShortName>Long-Term Related Party Payable - Payable Balance (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2410405 - Disclosure - Long-Term Related Party Payable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/LongTermRelatedPartyPayableDetailsTextual</Role>
      <ShortName>Long-Term Related Party Payable (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Income Taxes - Income (Loss) Before Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesIncomeLossBeforeIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Income (Loss) Before Income Taxes (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Income Taxes - Income Tax Provision (Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesIncomeTaxProvisionBenefitDetails</Role>
      <ShortName>Income Taxes - Income Tax Provision (Benefit) (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2411404 - Disclosure - Income Taxes - Reconciliation of Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesReconciliationOfTaxRateDetails</Role>
      <ShortName>Income Taxes - Reconciliation of Tax Rate (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2411405 - Disclosure - Income Taxes - Unrecognized Tax Benefit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesUnrecognizedTaxBenefitDetails</Role>
      <ShortName>Income Taxes - Unrecognized Tax Benefit (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2411406 - Disclosure - Income Taxes - Deferred Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesDeferredTaxesDetails</Role>
      <ShortName>Income Taxes - Deferred Taxes (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/IncomeTaxesDetailsTextual</Role>
      <ShortName>Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Post-Retirement Benefit Plans - Benefit Obligation Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlansBenefitObligationAssumptionsDetails</Role>
      <ShortName>Post-Retirement Benefit Plans - Benefit Obligation Assumptions (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Post-Retirement Benefit Plans - Benefit Obligation Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlansBenefitObligationActivityDetails</Role>
      <ShortName>Post-Retirement Benefit Plans - Benefit Obligation Activity (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - Post-Retirement Benefit Plans - Future Obligation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlansFutureObligationDetails</Role>
      <ShortName>Post-Retirement Benefit Plans - Future Obligation (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2412405 - Disclosure - Post-Retirement Benefit Plans (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/PostRetirementBenefitPlansDetailsTextual</Role>
      <ShortName>Post-Retirement Benefit Plans (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - Other Assets and Liabilities - Prepaid Expenses and Other Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilitiesPrepaidExpensesAndOtherCurrentAssetsDetails</Role>
      <ShortName>Other Assets and Liabilities - Prepaid Expenses and Other Current Assets (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - Other Assets and Liabilities - Other Non-Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilitiesOtherNonCurrentAssetsDetails</Role>
      <ShortName>Other Assets and Liabilities - Other Non-Current Assets (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2413404 - Disclosure - Other Assets and Liabilities - Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilitiesAccruedExpensesDetails</Role>
      <ShortName>Other Assets and Liabilities - Accrued Expenses (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2413405 - Disclosure - Other Assets and Liabilities - Other Non-Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/OtherAssetsAndLiabilitiesOtherNonCurrentLiabilitiesDetails</Role>
      <ShortName>Other Assets and Liabilities - Other Non-Current Liabilities (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - Contingent Liabilities and Commitments - Purchase Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitmentsPurchaseCommitmentsDetails</Role>
      <ShortName>Contingent Liabilities and Commitments - Purchase Commitments (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2414403 - Disclosure - Contingent Liabilities and Commitments - Lease Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitmentsLeaseCommitmentsDetails</Role>
      <ShortName>Contingent Liabilities and Commitments - Lease Commitments (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2414404 - Disclosure - Contingent Liabilities and Commitments Contingent Liabilities and Commitments - Contractual Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitmentsContingentLiabilitiesAndCommitmentsContractualObligationsDetails</Role>
      <ShortName>Contingent Liabilities and Commitments Contingent Liabilities and Commitments - Contractual Obligations (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2414405 - Disclosure - Contingent Liabilities and Commitments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ContingentLiabilitiesAndCommitmentsDetailsTextual</Role>
      <ShortName>Contingent Liabilities and Commitments (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2415402 - Disclosure - Equity Instruments and Stock Based Compensation - Stock-based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationStockBasedCompensationExpenseDetails</Role>
      <ShortName>Equity Instruments and Stock Based Compensation - Stock-based Compensation Expense (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2415403 - Disclosure - Equity Instruments and Stock Based Compensation - Fair Value Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationFairValueAssumptionsDetails</Role>
      <ShortName>Equity Instruments and Stock Based Compensation - Fair Value Assumptions (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2415404 - Disclosure - Equity Instruments and Stock Based Compensation - Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationStockOptionsDetails</Role>
      <ShortName>Equity Instruments and Stock Based Compensation - Stock Options (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2415405 - Disclosure - Equity Instruments and Stock Based Compensation - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationWarrantsDetails</Role>
      <ShortName>Equity Instruments and Stock Based Compensation - Warrants (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2415406 - Disclosure - Equity Instruments and Stock Based Compensation - Free Share Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationFreeShareAwardsDetails</Role>
      <ShortName>Equity Instruments and Stock Based Compensation - Free Share Awards (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2415407 - Disclosure - Equity Instruments and Stock Based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EquityInstrumentsAndStockBasedCompensationDetailsTextual</Role>
      <ShortName>Equity Instruments and Stock Based Compensation (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2416402 - Disclosure - Earnings (Loss) Per Share - Reconciliation of basic and diluted EPS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EarningsLossPerShareReconciliationOfBasicAndDilutedEpsDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Reconciliation of basic and diluted EPS (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2416403 - Disclosure - Earnings (Loss) Per Share (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/EarningsLossPerShareDetailsTextual</Role>
      <ShortName>Earnings (Loss) Per Share (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2417402 - Disclosure - Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ComprehensiveIncomeLossDetails</Role>
      <ShortName>Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>2417403 - Disclosure - Comprehensive Income (Loss) (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ComprehensiveIncomeLossDetailsTextual</Role>
      <ShortName>Comprehensive Income (Loss) (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>2418402 - Disclosure - Company Operations by Product, Customer and Geographic Area - Revenue by Product (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicAreaRevenueByProductDetails</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area - Revenue by Product (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>2418403 - Disclosure - Company Operations by Product, Customer and Geographic Area - Revenue by Significant Customer (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicAreaRevenueBySignificantCustomerDetails</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area - Revenue by Significant Customer (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>2418404 - Disclosure - Company Operations by Product, Customer and Geographic Area - Data by Geographic Region (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicAreaDataByGeographicRegionDetails</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area - Data by Geographic Region (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>2418405 - Disclosure - Company Operations by Product, Customer and Geographic Area (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/CompanyOperationsByProductCustomerAndGeographicAreaDetailsTextual</Role>
      <ShortName>Company Operations by Product, Customer and Geographic Area (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>2419402 - Disclosure - Discontinued Operations - Master Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperationsMasterAgreementDetails</Role>
      <ShortName>Discontinued Operations - Master Agreement (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>2419403 - Disclosure - Discontinued Operations - Option Agreement Net Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperationsOptionAgreementNetIncomeDetails</Role>
      <ShortName>Discontinued Operations - Option Agreement Net Income (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>2419404 - Disclosure - Discontinued Operations - Option Agreement Cash Flow (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperationsOptionAgreementCashFlowDetails</Role>
      <ShortName>Discontinued Operations - Option Agreement Cash Flow (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>2419405 - Disclosure - Discontinued Operations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/DiscontinuedOperationsDetailsTextual</Role>
      <ShortName>Discontinued Operations (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>2420401 - Disclosure - Related Party Transactions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/RelatedPartyTransactionsDetailsTextual</Role>
      <ShortName>Related Party Transactions (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>2421401 - Disclosure - Subsequent Event (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/SubsequentEventDetailsTextual</Role>
      <ShortName>Subsequent Event (Details Textual)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="avdl-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>2422401 - Schedule - Schedule II - Valuation and Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avadel.com/role/ScheduleIiValuationAndQualifyingAccountsDetails</Role>
      <ShortName>Schedule II - Valuation and Qualifying Accounts (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>avdl-20161231.xml</File>
    <File>avdl-20161231.xsd</File>
    <File>avdl-20161231_cal.xml</File>
    <File>avdl-20161231_def.xml</File>
    <File>avdl-20161231_lab.xml</File>
    <File>avdl-20161231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
