EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENTS (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 01, 2000	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Long-term Purchase Commitment [Line Items]
Services payable in cash or services, percent		50.00%
Research and development		$ 44,641	$ 41,154	$ 34,215
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
Research and development		$ 7,900	$ 9,200	$ 7,500