Note 16. Geographic and Significant Customer Information

The Company has one operating segment, which is the sale, design, manufacture, marketing and support of thin film, optical critical dimension and overlay dimension metrology systems. The following table summarizes total net revenues (based on the deployments and service location of the systems) and long-lived assets (excluding intangible assets) attributed to significant geographic regions (in thousands):



	Three Months Ended				Nine Months Ended
	September 29, 2012		October 1, 2011		September 29, 2012		October 1, 2011
Total net revenues:
United States	$	6,888	$	13,309	$	32,337	$	36,548
Europe	4,087		3,054		12,670		20,996
Japan	5,896		10,912		12,746		27,173
South Korea	18,554		22,986		75,663		70,603
Taiwan	6,233		2,775		12,105		9,556
Other	2,280		5,233		7,090		19,908
Total net revenues	$	43,938	$	58,269	$	152,611	$	184,784



Long-lived tangible assets:	September 29, 2012		December 31, 2011
United States	$	40,361	$	33,127
Europe	1,739		1,415
Japan	177		159
South Korea	538		503
Taiwan	91		113
All Other	174		204
Total long-lived tangible assets	$	43,080	$	35,521

The following customers accounted for 10% or more of total accounts receivable:



	At
	September 29, 2012		December 31, 2011
SK Hynix	18.0	%	11.4	%
Taiwan Semiconductor Mfg. Co.	15.0	%	***
Samsung Electronics Co. Ltd.	15.4	%	30.0	%
Intel Corporation	13.7	%	16.9	%

*** The customer accounted for less than 10% of total accounts receivable for that period.

The following customers accounted for 10% or more of total revenue



	Three Months Ended				Nine Months Ended
	September 29, 2012		October 1, 2011		September 29, 2012		October 1, 2011
SK Hynix	24.1	%	***		18.9	%	12.1	%
Samsung Electronics Co. Ltd.	17.4	%	31.8	%	31.6	%	28.2	%
Intel Corporation	15.3	%	14.3	%	20.1	%	18.6	%
Taiwan Semiconductor Mfg. Co.	12.8	%	***		***		***

*** The customer accounted for less than 10% of total revenue for that period.