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

12 Months Ended

Dec. 29, 2012

Geographic and Significant Customer Information [Abstract]

Total net revenue

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

Long-lived tangible assets

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

Revenues by product type

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

Customers accounted for 10% or more of total accounts receivable

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	%	***		***

Customers accounted for 10% or more of total revenue

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	%