GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION (Tables)

6 Months Ended

Jun. 29, 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						Six Months Ended
	June 29, 2014			June 30, 2013			June 29, 2014			June 30, 2013
	Amount		Percent	Amount		Percent	Amount		Percent	Amount		Percent
Net revenue:
United States	$	6,392	15	$	3,252	13	$	10,575	12	$	6,336	14
South Korea	23,863		57	1,407		6	34,122		40	2,275		5
China	2,268		5	2,008		8	15,349		18	3,960		9
Taiwan	5,498		13	14,659		60	16,320		19	26,724		60
Other Asia	1,589		4	2,292		9	3,870		5	3,358		7
Europe and others	2,419		6	956		4	4,991		6	2,158		5
	$	42,029	100	$	24,574	100	$	85,227	100	$	44,811	100

Summary of Geographic Information Relating to Property and Equipment

Geographical information relating to our property and equipment, net, as of June 29, 2014 and December 31, 2013 was as follows (in thousands):

	June 29, 2014		December 31, 2013
Property and equipment, net:
United States	$	4,728	$	4,949
Germany	3,885		4,129
Others	250		138
	$	8,863	$	9,216