GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION (Tables)

12 Months Ended

Dec. 31, 2013

Geographic and Customer Concentration Information [Abstract]

Summary of Net Sales by Geographic Area

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

	For the Years Ended December 31,
	2013			2012			2011
	Amount		Percent	Amount		Percent	Amount		Percent
Net revenues:
United States	$	12,350	10	$	17,476	14	$	10,311	6
Korea	22,173		19	47,611		38	84,623		46
Taiwan	50,782		43	28,577		23	37,507		20
China	20,250		17	8,562		7	12,110		7
Other Asia	8,740		7	13,615		10	21,002		11
Europe and others	5,139		4	10,685		8	19,394		10
	$	119,434	100	$	126,526	100	$	184,947	100

Summary of Geographic Information Relating to Property and Equipment

Geographical information relating to our property and equipment, net, as of December 31, 2013 and December 31, 2012 was as follows (in thousands):

	December 31,
	2013		2012
Property and equipment, net:
United States	$	4,949	$	3,824
Germany	4,129		3,131
Others	138		432
	$	9,216	$	7,387