Geographic and Significant Customer Information

The Company has one operating segment, which is the sale, design, manufacture, marketing and support of thin film and optical critical dimension systems. The following tables summarize 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 29, 2014		March 30, 2013
Total net revenues:
United States	$	6,741	$	9,433
Japan	3,684		5,212
Taiwan	4,416		2,310
China	15,488		644
South Korea	15,889		3,547
Other	5,358		3,406
Total net revenues	$	51,576	$	24,552



	At
	March 29, 2014		December 28, 2013
Long-lived tangible assets:
United States	$	44,545	$	44,775
Japan	122		125
South Korea	401		445
All Other	2,063		2,094
Total long-lived tangible assets	$	47,131	$	47,439

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



	At
	March 29, 2014		December 28, 2013
Intel Corporation	19.0	%	14.4	%
SK Hynix	10.9	%	21.8	%
Samsung Electronics Co. Ltd.	21.9	%	27.4	%
Taiwan Semiconductor Mfg. Co.	18.1	%	12.1	%

The following customers accounted for 10% or more of total net revenues:



	Three Months Ended
	March 29, 2014		March 30, 2013
Intel Corporation	13.1	%	29.3	%
Samsung Electronics Co. Ltd.	51.7	%	***

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