Employee stock purchase plan ESPP compensation expense.

No definition available.

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Namespace Prefix:	oled_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The maximum percentage of employees' base compensation that can be allocated under the plan.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The maximum number of shares that may be purchased on a given purchase date, under the plan.

+ References

No definition available.

+ Details

Name:	oled_EmployeeStockPurchasePlanESPPMaximumSharesOnPurchaseDate
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Balance Type:	na
Period Type:	duration

- Definition

The maximum value of shares that may be purchased by a single employee during a given calendar year, under the plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of the lesser of the price per share of common stock on the first day of the purchase period, or the last day of the purchase period, at which eligible employees may purchase shares under the plan.

+ References

No definition available.

+ Details

Name:	oled_EmployeeStockPurchasePlanESPPPercentageOfMarketValue
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The duration (in consecutive months) of purchase periods as defined by the the plan.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Employee stock purchase plan ESPP shares in ESPP.

+ References

No definition available.

+ Details

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Namespace Prefix:	oled_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section S99
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+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

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- Details

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- Details

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STOCK-BASED COMPENSATION - Employee Stock Purchase Plan - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 25, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from common stock issued	$ 441,000	$ 364,000	$ 1,440,000	$ 1,142,000
Employee Stock Purchase Plan (ESPP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for issuance (in shares)					1,000,000
Purchase period (in months)			three-month
Percentage of market value (in hundredths)			85.00%
Maximum allocation of base compensation (in hundredths)			10.00%
Maximum shares per purchase date (in shares)			12,500
Maximum value per calendar year, per employee			$ 25,000
Common stock issued (in shares)			6,508	7,702
Proceeds from common stock issued			$ 1,100,000	$ 869,000
Employee Stock Purchase Plan (ESPP) [Member] \| Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	20,000	21,000	78,000	81,000
Employee Stock Purchase Plan (ESPP) [Member] \| Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	46,000	34,000	140,000	107,000
Employee Stock Purchase Plan (ESPP) [Member] \| Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Charges to expense	$ 25,000	$ 29,000	$ 86,000	$ 85,000