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RETIREMENT PLAN BENEFIT LIABILITY - Additional Information (Details) - Supplemental Executive Retirement Plan [Member] $ in Millions | 6 Months Ended
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Jun. 30, 2025 USD ($) Participant
Defined Benefit Plan Disclosure [Line Items] |
Number of participants | Participant | 7
Benefit Payments | $ | $ 1.0

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- Definition The number of participants in the defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | oled_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of expense for employee benefit and equity-based compensation. + References No definition available. + Details
Name: | us-gaap_EmployeeBenefitsAndShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |