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 and optical critical dimension 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 28, 2013, December 29, 2012, and December 31, 2011, the Company recorded revenue from customers primarily in the United States, Asia and Europe. The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):



	Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Total net revenues (1):
United States	$	47,019	44,811		50,447
Japan	11,629		16,832		34,806
South Korea	34,873		79,555		87,533
Other	50,786		41,683		57,275
Total net revenues	$	144,307	$	182,881	$	230,061

⁽¹⁾ Net revenues are attributed to countries based on the customer's deployment and service locations of systems.



Long-lived tangible assets:	December 28, 2013		December 29, 2012
United States	44,775		40,600
Japan	125		148
South Korea	445		520
All Other	2,094		1,945
Total long-lived tangible assets	$	47,439	$	43,213

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 28, 2013		December 29, 2012		December 31, 2011
Automated Systems	$	82,924	119,451		139,261
Integrated Systems	11,412		12,379		25,413
Materials Characterization Systems	13,066		11,997		30,100
Total product revenues	$	107,402	$	143,827	$	194,774

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



	At
	December 28, 2013		December 29, 2012		December 31, 2011
Samsung Electronics Co. Ltd.	27.4	%	***		41.1	%
Intel Corporation	14.4	%	12.3	%	***
Taiwan Semiconductor Manufacturing Company Limited	12.1	%	17.3	%	***
SK Hynix	21.8	%	***		***

*** 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 28, 2013		December 29, 2012		December 31, 2011
Samsung Electronics Co. Ltd.	14.4	%	27.8	%	30.0	%
SK Hynix	18.4	%	16.5	%	11.4	%
Intel Corporation	30.0	%	22.3	%	16.9	%