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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) |  |  |  |  | 3 Months Ended | 12 Months Ended
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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.

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