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CASH, CASH EQUIVALENTS AND INVESTMENTS - Additional Information (Details) $ in Millions	Jun. 30, 2020 USD ($) Investment
Cash And Cash Equivalents [Abstract]
Number of minority investments | Investment	1
Minority investment, carrying value | $	$ 5.0

X

- Definition

Minority investment carrying value.

+ References

No definition available.

+ Details

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

X

- Definition

Number of minority investments.

+ References

No definition available.

+ Details

Name:	oled_NumberOfMinorityInvestments
Namespace Prefix:	oled_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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