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EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Oct. 01, 2011 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Long-term Purchase Commitment [Line Items] |  |  |  |  |
Percent Of Services Payable In Cash Or Shares |  | 50.00% |  | 50.00% |
Issuance of common stock in connection with materials and license agreements (in shares) |  | 0 | 0 | 0 | 0
New OLED Materials Agreement and OLED Materials Agreement [Member] |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |
New OLED Materials Agreement, automatic renewal term | 1 year |  |  |  |
New OLED Materials Agreement, termination notice period | 1 year |  |  |  |
Minimum average closing price of common stock (in dollars per share) |  | $ 20.00 |  | $ 20.00 |
Charges to expense for cash portion of reimbursement of expenses |  | $ 1.5 | $ 3.7 | $ 3.0 | $ 7.2
PPG Industries [Member] | New OLED Materials Agreement and OLED Materials Agreement [Member] |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |
New OLED Materials Agreement, termination notice period | 2 years |  |  |  |

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- Definition The minimum average closing price of the Company's common stock during a specified number of days prior to the end of each calendar half-year period ending on March 31 and September 30. If the average closing price is less than this amount, the Company is required to compensate PPG Industries in cash. + References No definition available. + Details
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