EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Oct. 01, 2000	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long-term Purchase Commitment [Line Items]
Services payable in cash or services, percent		50.00%
Development Arrangement [Member]
Long-term Purchase Commitment [Line Items]
Term of long-term purchase agreement	5 years
Supply Agreement [Member]
Long-term Purchase Commitment [Line Items]
Term of long-term purchase agreement	7 years
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
Issuance of common stock in connection with materials and license agreements (in shares)		0	0
Charges to expense for cash portion of reimbursement of expenses		$ 9.2	$ 7.5	$ 6.2