License agreement extended option term.

No definition available.

Name:	oled_LicenseAgreementExtendedOptionTerm
Namespace Prefix:	oled_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

License fee agreement, term of agreement.

+ References

No definition available.

+ Details

Name:	oled_LicenseFeeAgreementTermOfAgreement
Namespace Prefix:	oled_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Minority equity investment.

+ References

No definition available.

+ Details

Name:	oled_MinorityEquityInvestment
Namespace Prefix:	oled_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Minority interest ownership percentage cost method.

+ References

No definition available.

+ Details

Name:	oled_MinorityInterestOwnershipPercentageCostMethod
Namespace Prefix:	oled_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Recognized income tax positions measured at percentage of likelihood of realization.

+ References

No definition available.

+ Details

Name:	oled_RecognizedIncomeTaxPositionsMeasuredAtPercentageOfLikelihoodOfRealization
Namespace Prefix:	oled_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Summary of significant accounting policies.

+ References

No definition available.

+ Details

Name:	oled_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	oled_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the likelihood that an uncertainty in income taxes will not be sustained as a result of the examination by the taxing authority.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 15
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=65877542&loc=d3e27249-109313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

Name:	us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of tax expense classified as other.

+ References

No definition available.

+ Details

Name:	us-gaap_TaxesOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=oled_FujifilmMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=oled_BASFSEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OtherIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=oled_AdesisIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)			3 Months Ended
	Jun. 28, 2016	Jul. 23, 2012	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items]
Minority equity investements			$ 0
License agreement, extended option term			2 years
License fee agreement, term of agreement			5 years
Taxes, other			$ 38,000	$ 6,000
Recognized income tax positions measured at likelihood of realization description			Recognized income tax positions are measured at the largest amount of which the likelihood of realization is greater than 50%.
Operating lease, right-of-use asset			$ 8,000,000
Operating lease, liabilities			$ 7,956,000
Leases - ASU No. 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating lease, right-of-use asset					$ 8,300,000
Operating lease, liabilities					$ 8,300,000
Patents [Member] \| FUJIFILM [Member]
Summary Of Significant Accounting Policies [Line Items]
OLED patents useful life		10 years	10 years
Patents [Member] \| BASF [Member]
Summary Of Significant Accounting Policies [Line Items]
OLED patents useful life	10 years		10 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Minority interest ownership percentage cost method			20.00%
Maximum [Member] \| Other Intangible Assets [Member] \| Adesis, Inc. [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)			15 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Recognized income tax positions measured at percentage of likelihood of realization			50.00%
Minimum [Member] \| Other Intangible Assets [Member] \| Adesis, Inc. [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)			10 years