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
	March 31, 2012		April 2, 2011
Total net revenues:
United States	$	11,577	$	14,565
Israel	6,316		7,736
Japan	4,339		7,890
South Korea	27,471		25,144
All other	5,789		6,808
Total net revenues	$	55,492	$	62,143



	At
	March 31, 2012		December 31, 2011
Long-lived tangible assets:
United States	$	35,976	$	33,127
Israel	112		115
Japan	161		159
South Korea	586		503
All other	1,420		1,617
Total long-lived tangible assets	$	38,255	$	35,521

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



	At
	March 31, 2012		December 31, 2011
Samsung Electronics Co. Ltd.	35.3	%	30.0	%
Intel Corporation	19.7	%	16.9	%
Hynix	12.6	%	11.4	%

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



	Three Months Ended
	March 31, 2012		April 2, 2011
Intel Corporation	29.9	%	28.7	%
Samsung Electronics Co. Ltd.	40.5	%	27.5	%
Hynix Semiconductor, Inc.	***		11.7	%

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