Note 17. 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 30, 2013		March 31, 2012
Total net revenues:
United States	$	9,433	$	11,577
Japan	5,212		4,339
South Korea	3,547		27,471
Israel	255		6,316
All Other	6,105		5,789
Total net revenues	$	24,552	$	55,492



	At
	March 30, 2013		December 29, 2012
Long-lived tangible assets:
United States	$	40,399	$	40,600
Japan	125		148
South Korea	465		520
Israel	10		13
All Other	1,939		1,932
Total long-lived tangible assets	$	42,938	$	43,213

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



	At
	March 30, 2013		December 29, 2012
Intel Corporation	20.2	%	12.3	%
Taiwan Semiconductor Mfg. Co.	***		17.3	%

*** 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
	March 30, 2013		March 31, 2012
Intel Corporation	29.3	%	29.9	%
Samsung Electronics Co. Ltd.	***		40.5	%

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