CONCENTRATION OF RISK, Revenues by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]
Revenues	$ 49,478	[1]	$ 32,826	$ 49,359	$ 14,976	$ 28,133	$ 12,504	$ 29,987	$ 12,620	$ 146,639	$ 83,244	$ 61,289
UNITED STATES
Concentration Risk [Line Items]
Revenues										1,552	3,893	6,842
South Korea [Member]
Concentration Risk [Line Items]
Revenues										102,948	61,960	38,582
Japan [Member]
Concentration Risk [Line Items]
Revenues										40,539	13,666	15,005
Taiwan [Member]
Concentration Risk [Line Items]
Revenues										904	3,074	643
Other [Member]
Concentration Risk [Line Items]
Revenues										696	651	217
All Countries [Domain]
Concentration Risk [Line Items]
Revenues										$ 145,087	$ 79,351	$ 54,447

[1] ncludes $1.5 million of revenue that was recognized relating to cash payments received in a prior year that were creditable against license fees and/or royalties for which the Company determined there was no appreciable likelihood of executing a commercial license agreement with the customer (see Note 2).