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EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		0 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Oct. 01, 2000 Research and Development Arrangement [Member]	Oct. 01, 2000 Inventories [Member]	Jun. 30, 2014 New OLED Materials Agreement and OLED Materials Agreement [Member]	Jun. 30, 2013 New OLED Materials Agreement and OLED Materials Agreement [Member]	Jun. 30, 2014 New OLED Materials Agreement and OLED Materials Agreement [Member]	Jun. 30, 2013 New OLED Materials Agreement and OLED Materials Agreement [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Agreement Period					5 years	7 years
Percent Of Services Payable In Cash Or Shares	50.00%		50.00%
Minimum average closing price of common stock (in dollars per share)							$ 20.00		$ 20.00
Issuance of common stock in connection with materials and license agreements (in shares)	0	0	0	0
Charges to expense for cash portion of reimbursement of expenses							$ 3.7	$ 1.0	$ 7.2	$ 3.3