CONCENTRATION OF RISK, Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Concentration Risk [Line Items]
Revenues	$ 58,092	$ 64,127	$ 89,315	$ 101,965
South Korea [Member]
Concentration Risk [Line Items]
Revenues	53,842	49,262	76,064	72,218
Japan [Member]
Concentration Risk [Line Items]
Revenues	2,866	10,903	10,626	24,961
Other [Member]
Concentration Risk [Line Items]
Revenues	867	3,798	1,883	4,456
All Countries [Domain]
Concentration Risk [Line Items]
Revenues	57,575	63,963	88,573	101,635
UNITED STATES
Concentration Risk [Line Items]
Revenues	$ 517	$ 164	$ 742	$ 330
Geographic Concentration Risk [Member] | Total Revenue [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	99.00%	99.00%	99.00%	99.00%