EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Long-term Purchase Commitment [Line Items]
Percent Of Services Payable In Cash Or Shares	50.00%
Issuance of common stock in connection with materials and license agreements (in shares)	0
New OLED Materials Agreement and OLED Materials Agreement [Member]
Long-term Purchase Commitment [Line Items]
Minimum average closing price of common stock (in dollars per share)	$ 20.00
Charges to expense for cash portion of reimbursement of expenses	$ 3.5	$ 2.3