CONCENTRATION OF RISK, Revenues by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Concentration Risk [Line Items]
Revenues	$ 32,892	$ 32,826	$ 134,857	$ 97,161
UNITED STATES
Concentration Risk [Line Items]
Revenues	118	269	448	1,353
South Korea [Member]
Concentration Risk [Line Items]
Revenues	22,511	18,707	94,729	66,509
Japan [Member]
Concentration Risk [Line Items]
Revenues	8,579	13,160	33,541	28,257
Other [Member]
Concentration Risk [Line Items]
Revenues	1,684	690	6,139	1,042
All Countries [Domain]
Concentration Risk [Line Items]
Revenues	$ 32,774	$ 32,557	$ 134,409	$ 95,808
Geographic Concentration Risk [Member] | Total Revenue [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	100.00%	99.00%	100.00%	99.00%