CONCENTRATION OF RISK, Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Concentration Risk [Line Items]
Revenues	$ 29,703	$ 31,223
South Korea [Member]
Concentration Risk [Line Items]
Revenues	25,963	22,222
Japan [Member]
Concentration Risk [Line Items]
Revenues	1,287	7,760
Other [Member]
Concentration Risk [Line Items]
Revenues	2,370	1,016
Total Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Revenues	29,620	$ 30,998
UNITED STATES
Concentration Risk [Line Items]
Revenues	$ 83		$ 225