SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)				3 Months Ended		6 Months Ended
	Jun. 28, 2016	Jul. 23, 2012	Mar. 09, 2011	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
License agreement, extended option term						2 years
License fee agreement, term of agreement						5 years
Taxes, other				$ 23,000	$ 151,000	$ 29,000	$ 207,000
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						$ 64,423,000	505,000
Deferred revenue offset by reduction of retained earnings								$ (17,894,000)
Revenues				56,149,000	$ 102,513,000	99,721,000	$ 158,079,000
Revenue from Contracts with Customers - ASU No. 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase in deferred revenue						21,300,000
Deferred revenue offset by reduction of retained earnings				17,900,000		17,900,000
Deferred revenue offset by reduction of retained earnings, tax amount						3,100,000
Unbilled receivables				300,000		300,000
Revenues				$ 17,500,000		$ 42,100,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Recognized income tax positions measured at percentage of likelihood of realization						50.00%
Licensing Agreements [Member] | Motorola [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)			7 years 6 months
Patents [Member] | FUJIFILM [Member]
Summary Of Significant Accounting Policies [Line Items]
OLED patents useful life		10 years
Patents [Member] | BASF [Member]
Summary Of Significant Accounting Policies [Line Items]
OLED patents useful life	10 years
Other Intangible Assets [Member] | Adesis, Inc. [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)						10 years
Other Intangible Assets [Member] | Adesis, Inc. [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period of acquired intangible assets (in years)						15 years