SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES Geographic Net Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue by Geography
Total Net Revenues	$ 107,563	$ 97,571	$ 212,251	$ 185,607
United States of America
Revenue by Geography
Total Net Revenues	4,474	3,611	8,303	7,219
Hong Kong/China
Revenue by Geography
Total Net Revenues	56,547	49,355	111,392	92,697
Taiwan
Revenue by Geography
Total Net Revenues	10,762	14,021	23,796	24,420
Korea
Revenue by Geography
Total Net Revenues	9,678	9,887	19,184	19,560
Western Europe (excluding Germany)
Revenue by Geography
Total Net Revenues	12,751	9,839	24,722	20,550
Japan
Revenue by Geography
Total Net Revenues	5,837	5,535	10,485	10,343
Germany
Revenue by Geography
Total Net Revenues	2,915	1,751	5,711	3,850
Other
Revenue by Geography
Total Net Revenues	$ 4,599	$ 3,572	$ 8,658	$ 6,968