SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)					3 Months Ended										12 Months Ended
	Jan. 01, 2019	Jun. 28, 2016	Jul. 23, 2012	Mar. 09, 2011	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	[1]	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents maturity period															three months or less
Allowance for doubtful accounts					$ 77,000				$ 0						$ 77,000	$ 0	$ 100,000
Goodwill impairment loss															$ 0
License agreement, extended option term															2 years
License fee agreement, term of agreement															5 years
Taxes, other															$ 117,000	409,000	171,000
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%.
Increase in deferred revenue															$ 130,639,000	8,402,000	3,360,000
Reduction in retained earnings									17,100,000							17,100,000
Revenues					70,143,000	$ 77,550,000	$ 56,149,000	$ 43,572,000	$ 115,867,000	[1],[2]	$ 61,683,000	$ 102,513,000		$ 55,566,000	247,414,000	335,629,000	198,886,000
Other current liabilities															5,761,000	$ (1,917,000)	$ 4,362,000
Other liabilities															23,896,000
Revenue from Contracts with Customers - ASU No. 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase in deferred revenue															21,300,000
Reduction in retained earnings					17,100,000										17,100,000
Reduction in retained earnings, tax amount															3,900,000
Unbilled receivables					$ 300,000										300,000
Revenues															$ 78,900,000
Leases - ASU No. 2016-02 [Member] | Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Reduction in retained earnings	$ 592,000,000
Reduction in retained earnings, tax amount	157,000,000
Increases in net property and equipment	7,000,000
Other current liabilities	1,300,000
Other liabilities	$ 6,500,000
Licensing Agreements [Member] | Motorola [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)				7 years 6 months											7 years 6 months
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
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
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
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)															30 years
Building Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)															15 years
Office, Lab Equipment and Furniture and Fixtures [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)															3 years
Office, Lab Equipment and Furniture and Fixtures [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)															7 years
Computer Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)															3 years

[1] Prior to the adoption of ASC 606 on January 1, 2018, the Company recorded as revenue the receipt of the semi-annual license fee payment of $45.0 million from SDC in the second and fourth quarters.

[2] The enactment of the Tax Cuts and Jobs Act in December 2017 resulted in a one-time charge of $11.5 million in the fourth quarter.