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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) |  |  |  |  | 3 Months Ended | 9 Months Ended
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Jan. 02, 2017 | Jun. 28, 2016 | Jul. 23, 2012 | Mar. 09, 2011 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
License fee agreement, term of agreement |  |  |  |  |  |  | 6 years 4 months 25 days |
Taxes, other |  |  |  |  | $ 97,000 | $ 74,000 | $ 304,000 | $ 143,000
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%. |
ASU No. 2016-09 [Member] |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Deferred tax asset and offsetting credit to retained earnings | $ 26,500,000 |  |  |  |  |  |  |
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 | FUJIFILM [Member] |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
OLED patents useful life |  |  | 10 years |  |  |  |  |
Patents | 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 |
OLED Technology License Agreement [Member] | Tianma [Member] |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Agreement effective date |  |  |  |  |  |  | Jul. 21, 2016 |
Agreement period |  |  |  |  |  |  | 5 years |
Supplemental Material Purchase Agreement [Member] | Tianma [Member] |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Agreement effective date |  |  |  |  |  |  | Jul. 21, 2016 |
Agreement period |  |  |  |  |  |  | 5 years |

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