Segment, Geographic, Product 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 Chief Executive Officer has been identified as the Chief Operating Decision Maker (“CODM”) because he has the final authority over resource allocation decisions and performance assessment. The CODM does not receive discrete financial information about individual components of the Company's business. For the years ended December 29, 2012, December 31, 2011, and January 1, 2011, the Company recorded revenue from customers primarily in the United States, Asia and Europe. The following table summarizes total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):



	Years Ended
	December 29, 2012		December 31, 2011		January 1, 2011
Total net revenues:
United States	$	44,811	$	50,447	$	65,099
Japan	16,832		34,806		19,776
South Korea	79,555		87,533		54,156
Other	41,683		57,275		49,034
Total net revenues	$	182,881	$	230,061	$	188,065

* Net revenues are attributed to countries based on the customer's deployment and service locations of systems.



Long-lived tangible assets:	December 29, 2012		December 31, 2011
United States	$	40,600	$	33,127
Japan	148		159
South Korea	520		503
All Other	1,945		1,732
Total long-lived tangible assets	$	43,213	$	35,521

The Company’s product lines differ primarily based on the environment in which the systems will be used. Automated systems are used primarily in high-volume production environments. Materials characterization products are primarily used to measure the composition, band gap, structure, and other physical and electrical properties of semiconducting materials for discrete electronic industry, high brightness LED and solar/photovoltaic structures in both development and high volume environments. Integrated systems are installed inside wafer processing equipment to provide near real-time measurements for improving process control and increasing throughput. Revenues by product type were as follows (in thousands):



	Years Ended
	December 29, 2012		December 31, 2011		January 1, 2011
Automated Systems	$	119,451	$	139,261	$	110,955
Integrated Systems	12,379		25,413		17,437
Materials Characterization Systems	11,997		30,100		26,156
Total product revenues	$	143,827	$	194,774	$	154,548

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



	At
	December 29, 2012		December 31, 2011		January 1, 2011
Samsung Electronics Co. Ltd.	***		41.1	%	19.2	%
Intel Corporation	12.3	%	***		***
Taiwan Semiconductor Manufacturing Company Limited	17.3	%	***		***

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

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



	Years Ended
	December 29, 2012		December 31, 2011		January 1, 2011
Samsung Electronics Co. Ltd.	27.8	%	30.0	%	23.0	%
SK Hynix	16.5	%	11.4	%	12.8	%
Intel Corporation	22.3	%	16.9	%	16.4	%