GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION (Tables)

3 Months Ended

Mar. 29, 2015

Geographic and Customer Concentration Information [Abstract]

Summary of Net Revenue 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
	March 29, 2015			March 30, 2014
	Amount		Percent	Amount		Percent
Net revenue:
United States	$	8,568	15	$	4,183	10
South Korea	33,998		58	10,259		24
China	3,599		6	13,081		30
Taiwan	5,520		10	10,822		25
Other Asia	5,365		9	2,281		5
Europe and others	1,204		2	2,572		6
	$	58,254	100	$	43,198	100

Summary of Geographic Information Relating to Property and Equipment

Geographical information relating to our property and equipment, net, as of March 29, 2015 and December 31, 2014 was as follows (in thousands):

	March 29, 2015		December 31, 2014
Property and equipment, net:
United States	$	4,582	$	4,140
Germany	4,456		3,185
Others	210		209
	$	9,248	$	7,534