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Segment, Geographic, Product and Significant Customer Information (Tables)

12 Months Ended

Dec. 28, 2013

Geographic and Significant Customer Information [Abstract]

Total net revenue

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

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

Revenues by product type

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

Customers accounted for 10% or more of total accounts receivable

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.

Customers accounted for 10% or more of total revenue

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	%

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Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

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