<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>304</ContextCount>
  <ElementCount>397</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>82</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - CONSOLIDATED BALANCE SHEETS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSUNAUDITED</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020 - Statement - CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSUNAUDITEDParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030 - Statement - CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFINCOMEUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUNAUDITEDParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Non-Cash Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITEDNonCashActivities</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Non-Cash Activities</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100090 - Disclosure - BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureBUSINESS</Role>
      <ShortName>BUSINESS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100100 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100110 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTS</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100120 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTS</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100130 - Disclosure - INVENTORY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINVENTORY</Role>
      <ShortName>INVENTORY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100140 - Disclosure - PROPERTY AND EQUIPMENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT</Role>
      <ShortName>PROPERTY AND EQUIPMENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100150 - Disclosure - GOODWILL AND INTANGIBLE ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETS</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100160 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100170 - Disclosure - RESEARCH AND LICENSE AGREEMENTS WITH PRINCETON UNIVERSITY, UNIVERSITY OF SOUTHERN CALIFORNIA AND THE UNIVERSITY OF MICHIGAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureRESEARCHANDLICENSEAGREEMENTSWITHPRINCETONUNIVERSITYUNIVERSITYOFSOUTHERNCALIFORNIAANDTHEUNIVERSITYOFMICHIGAN</Role>
      <ShortName>RESEARCH AND LICENSE AGREEMENTS WITH PRINCETON UNIVERSITY, UNIVERSITY OF SOUTHERN CALIFORNIA AND THE UNIVERSITY OF MICHIGAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100180 - Disclosure - EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureEQUITYANDCASHCOMPENSATIONUNDERTHEPPGAGREEMENTS</Role>
      <ShortName>EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100190 - Disclosure - SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSHAREHOLDERSEQUITY</Role>
      <ShortName>SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100200 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVELOSS</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100210 - Disclosure - STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSTOCKBASEDCOMPENSATION</Role>
      <ShortName>STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100220 - Disclosure - SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUPPLEMENTALEXECUTIVERETIREMENTPLAN</Role>
      <ShortName>SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100230 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100240 - Disclosure - CONCENTRATION OF RISK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISK</Role>
      <ShortName>CONCENTRATION OF RISK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100250 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100260 - Disclosure - REVENUE RECOGNITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITION</Role>
      <ShortName>REVENUE RECOGNITION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100270 - Disclosure - NET INCOME PER COMMON SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureNETINCOMEPERCOMMONSHARE</Role>
      <ShortName>NET INCOME PER COMMON SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100280 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100290 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTSTables</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTS</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100300 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTSTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTS</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100310 - Disclosure - INVENTORY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINVENTORYTables</Role>
      <ShortName>INVENTORY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINVENTORY</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100320 - Disclosure - PROPERTY AND EQUIPMENT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTTables</Role>
      <ShortName>PROPERTY AND EQUIPMENT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100330 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETSTables</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETS</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100340 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASES</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100350 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVELOSSTables</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVELOSS</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100360 - Disclosure - SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUPPLEMENTALEXECUTIVERETIREMENTPLANTables</Role>
      <ShortName>SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUPPLEMENTALEXECUTIVERETIREMENTPLAN</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100370 - Disclosure - CONCENTRATION OF RISK (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISKTables</Role>
      <ShortName>CONCENTRATION OF RISK (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISK</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100380 - Disclosure - REVENUE RECOGNITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITIONTables</Role>
      <ShortName>REVENUE RECOGNITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITION</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100390 - Disclosure - NET INCOME PER COMMON SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureNETINCOMEPERCOMMONSHARETables</Role>
      <ShortName>NET INCOME PER COMMON SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureNETINCOMEPERCOMMONSHARE</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100400 - Disclosure - BUSINESS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureBUSINESSAdditionalInformationDetails</Role>
      <ShortName>BUSINESS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100410 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100420 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Cash, Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTSScheduleOfCashCashEquivalentsDetails</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Cash, Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100430 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Short-Term Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTSScheduleOfShortTermInvestmentsDetails</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Short-Term Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100440 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCASHCASHEQUIVALENTSANDINVESTMENTSAdditionalInformationDetails</Role>
      <ShortName>CASH, CASH EQUIVALENTS AND INVESTMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100450 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTSScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100460 - Disclosure - FAIR VALUE MEASUREMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTSAdditionalInformationDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100470 - Disclosure - INVENTORY - Schedule of Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINVENTORYScheduleOfInventoryDetails</Role>
      <ShortName>INVENTORY - Schedule of Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100480 - Disclosure - INVENTORY - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINVENTORYAdditionalInformationDetails</Role>
      <ShortName>INVENTORY - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100490 - Disclosure - PROPERTY AND EQUIPMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTDetails</Role>
      <ShortName>PROPERTY AND EQUIPMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100500 - Disclosure - PROPERTY AND EQUIPMENT - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTAdditionalInformationDetails</Role>
      <ShortName>PROPERTY AND EQUIPMENT - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100510 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Acquired Technology (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETSScheduleOfAcquiredTechnologyDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Schedule of Acquired Technology (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100520 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Acquired Technology - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETSAcquiredTechnologyAdditionalInformationDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Acquired Technology - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100530 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Other Intangible Assets - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETSOtherIntangibleAssetsAdditionalInformationDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Other Intangible Assets - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100540 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureGOODWILLANDINTANGIBLEASSETSScheduleOfOtherIntangibleAssetsDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100550 - Disclosure - LEASES- Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASESAdditionalInformationDetails</Role>
      <ShortName>LEASES- Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>100560 - Disclosure - LEASES - Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASESSummaryOfOperatingLeaseCostAndSupplementalCashFlowInformationRelatedToOperatingLeasesDetails</Role>
      <ShortName>LEASES - Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>100570 - Disclosure - LEASES - Schedule of Weighted Average Assumptions Used to Compute Right-of-use Assets and Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASESScheduleOfWeightedAverageAssumptionsUsedToComputeRightOfUseAssetsAndLeaseLiabilitiesDetails</Role>
      <ShortName>LEASES - Schedule of Weighted Average Assumptions Used to Compute Right-of-use Assets and Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>100580 - Disclosure - LEASES - Schedule of Undiscounted Future Minimum Lease Payments Having Non-cancelable Lease Terms (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureLEASESScheduleOfUndiscountedFutureMinimumLeasePaymentsHavingNonCancelableLeaseTermsDetails</Role>
      <ShortName>LEASES - Schedule of Undiscounted Future Minimum Lease Payments Having Non-cancelable Lease Terms (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>100600 - Disclosure - RESEARCH AND LICENSE AGREEMENTS WITH PRINCETON UNIVERSITY, UNIVERSITY OF SOUTHERN CALIFORNIA AND THE UNIVERSITY OF MICHIGAN - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureRESEARCHANDLICENSEAGREEMENTSWITHPRINCETONUNIVERSITYUNIVERSITYOFSOUTHERNCALIFORNIAANDTHEUNIVERSITYOFMICHIGANAdditionalInformationDetails</Role>
      <ShortName>RESEARCH AND LICENSE AGREEMENTS WITH PRINCETON UNIVERSITY, UNIVERSITY OF SOUTHERN CALIFORNIA AND THE UNIVERSITY OF MICHIGAN - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.udcoled.com/20200930/taxonomy/role/DisclosureRESEARCHANDLICENSEAGREEMENTSWITHPRINCETONUNIVERSITYUNIVERSITYOFSOUTHERNCALIFORNIAANDTHEUNIVERSITYOFMICHIGAN</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>100610 - Disclosure - EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureEQUITYANDCASHCOMPENSATIONUNDERTHEPPGAGREEMENTSAdditionalInformationDetails</Role>
      <ShortName>EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>100620 - Disclosure - SHAREHOLDERS' EQUITY - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSHAREHOLDERSEQUITYAdditionalInformationDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>100630 - Disclosure - SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSHAREHOLDERSEQUITYDeferredCompensationArrangementAdditionalInformationDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>100640 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVELOSSScheduleOfAccumulatedOtherComprehensiveLossDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>100650 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVELOSSScheduleOfAccumulatedOtherComprehensiveLossParentheticalDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>100660 - Disclosure - STOCK-BASED COMPENSATION - Equity Compensation Plan - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSTOCKBASEDCOMPENSATIONEquityCompensationPlanAdditionalInformationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Equity Compensation Plan - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>100670 - Disclosure - STOCK-BASED COMPENSATION - Equity Instruments Other Than Options - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSTOCKBASEDCOMPENSATIONEquityInstrumentsOtherThanOptionsAdditionalInformationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Equity Instruments Other Than Options - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>100680 - Disclosure - STOCK-BASED COMPENSATION - Board of Directors Compensation - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSTOCKBASEDCOMPENSATIONBoardOfDirectorsCompensationAdditionalInformationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Board of Directors Compensation - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>100690 - Disclosure - STOCK-BASED COMPENSATION - Employee Stock Purchase Plan - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSTOCKBASEDCOMPENSATIONEmployeeStockPurchasePlanAdditionalInformationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Employee Stock Purchase Plan - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>100700 - Disclosure - SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUPPLEMENTALEXECUTIVERETIREMENTPLANAdditionalInformationDetails</Role>
      <ShortName>SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>100710 - Disclosure - SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Components of Net Periodic Pension Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureSUPPLEMENTALEXECUTIVERETIREMENTPLANComponentsOfNetPeriodicPensionCostDetails</Role>
      <ShortName>SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Components of Net Periodic Pension Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>100720 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIESAdditionalInformationDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>100730 - Disclosure - CONCENTRATION OF RISK - Revenues and Accounts Receivable From Our Largest Customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISKRevenuesAndAccountsReceivableFromOurLargestCustomersDetails</Role>
      <ShortName>CONCENTRATION OF RISK - Revenues and Accounts Receivable From Our Largest Customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>100740 - Disclosure - CONCENTRATION OF RISK - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISKAdditionalInformationDetails</Role>
      <ShortName>CONCENTRATION OF RISK - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>100750 - Disclosure - CONCENTRATION OF RISK - Revenues by Geographic Area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISKRevenuesByGeographicAreaDetails</Role>
      <ShortName>CONCENTRATION OF RISK - Revenues by Geographic Area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>100760 - Disclosure - CONCENTRATION OF RISK - Long-Lived Assets (Net) by Geographic Area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureCONCENTRATIONOFRISKLongLivedAssetsNetByGeographicAreaDetails</Role>
      <ShortName>CONCENTRATION OF RISK - Long-Lived Assets (Net) by Geographic Area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>100770 - Disclosure - INCOME TAXES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureINCOMETAXESAdditionalInformationDetails</Role>
      <ShortName>INCOME TAXES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>100780 - Disclosure - REVENUE RECOGNITION - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITIONAdditionalInformationDetails</Role>
      <ShortName>REVENUE RECOGNITION - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>100790 - Disclosure - REVENUE RECOGNITION - Schedule of Assets and Liabilities Associated with Contracts from Customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITIONScheduleOfAssetsAndLiabilitiesAssociatedWithContractsFromCustomersDetails</Role>
      <ShortName>REVENUE RECOGNITION - Schedule of Assets and Liabilities Associated with Contracts from Customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>100800 - Disclosure - REVENUE RECOGNITION - Summary of Significant Changes in Unbilled Receivables and Deferred Liabilities Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureREVENUERECOGNITIONSummaryOfSignificantChangesInUnbilledReceivablesAndDeferredLiabilitiesBalancesDetails</Role>
      <ShortName>REVENUE RECOGNITION - Summary of Significant Changes in Unbilled Receivables and Deferred Liabilities Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>100810 - Disclosure - NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureNETINCOMEPERCOMMONSHAREScheduleOfEarningsPerShareDetails</Role>
      <ShortName>NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="oled-10q_20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>100820 - Disclosure - NET INCOME PER COMMON SHARE - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.udcoled.com/20200930/taxonomy/role/DisclosureNETINCOMEPERCOMMONSHAREAdditionalInformationDetails</Role>
      <ShortName>NET INCOME PER COMMON SHARE - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</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="oled-10q_20200930.htm">oled-10q_20200930.htm</File>
    <File>oled-20200930.xsd</File>
    <File>oled-20200930_cal.xml</File>
    <File>oled-20200930_def.xml</File>
    <File>oled-20200930_lab.xml</File>
    <File>oled-20200930_pre.xml</File>
    <File>oled-ex311_6.htm</File>
    <File>oled-ex312_8.htm</File>
    <File>oled-ex321_9.htm</File>
    <File>oled-ex322_7.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>gvwvh24xbfnx000001.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
