GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION (Tables)

9 Months Ended

Sep. 28, 2014

Geographic and Customer Concentration Information [Abstract]

Summary of Net Sales by Geographic Area

The following table summarizes net revenue by geographic areas based on the installation locations of the systems and the location of services rendered (in thousands, except percentages):

	Three Months Ended						Nine Months Ended
	September 28, 2014			September 29, 2013			September 28, 2014			September 29, 2013
	Amount		Percent	Amount		Percent	Amount		Percent	Amount		Percent
Net revenue:
United States	$	8,188	21	$	1,045	3	$	18,763	15	$	7,380	9
South Korea	15,613		41	9,998		30	49,735		40	12,273		16
China	853		2	1,450		4	16,202		13	5,410		7
Taiwan	10,746		28	15,753		47	27,066		22	42,477		54
Other Asia	1,718		5	3,377		10	5,588		5	6,736		9
Europe and others	1,312		3	2,217		6	6,303		5	4,375		5
	$	38,430	100	$	33,840	100	$	123,657	100	$	78,651	100

Summary of Geographic Information Relating to Property and Equipment

Geographical information relating to our property and equipment, net, as of September 28, 2014 and December 31, 2013 was as follows (in thousands):

	September 28, 2014		December 31, 2013
Property and equipment, net:
United States	$	4,555	$	4,949
Germany	3,491		4,129
Others	227		138
	$	8,273	$	9,216