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

12 Months Ended

Dec. 27, 2014

The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands):



	Years Ended
	December 27, 2014		December 28, 2013		December 29, 2012
Total net revenues ⁽¹⁾:
United States	$	36,123	47,019		44,811
South Korea	41,381		34,873		79,555
China	28,702		13,063		5,323
Taiwan	19,790		9,645		16,757
Other	40,447		39,707		36,435
Total net revenues	$	166,443	$	144,307	$	182,881

⁽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 27, 2014		December 28, 2013
United States	$	47,729	$	44,775
Japan	71		125
South Korea	284		445
All Other	1,549		2,094
Total long-lived tangible assets	$	49,633	$	47,439

Revenues by product type

Revenues by product type were as follows (in thousands):



	Years Ended
	December 27, 2014		December 28, 2013		December 29, 2012
Automated Systems	$	108,768	$	82,924	$	119,451
Integrated Systems	15,334		11,412		12,379
Materials Characterization Systems	9,487		13,066		11,997
Total product revenues	$	133,589	$	107,402	$	143,827

Customers accounted for 10% or more of total accounts receivable

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



	At
	December 27, 2014		December 28, 2013		December 29, 2012
Samsung Electronics Co. Ltd.	10.0	%	27.4	%	***
Intel Corporation	***		14.4	%	12.3	%
Taiwan Semiconductor Manufacturing Company Limited	20.2	%	12.1	%	17.3	%
SK Hynix	***		21.8	%	***
Micron	23.7	%	***		***
GLOBALFOUNDRIES	10.2	%	***		***

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

Customers accounted for 10% or more of total revenue

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



	Years Ended
	December 27, 2014		December 28, 2013		December 29, 2012
Samsung Electronics Co. Ltd.	26.9	%	14.4	%	27.8	%
Intel Corporation	12.6	%	30.0	%	22.3	%
SK Hynix	12.2	%	18.4	%	16.5	%
Micron	10.4	%	***		***

*** The customer accounted for less than 10% of total net revenue during the period.