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

3 Months Ended

Mar. 28, 2015

Segment Reporting [Abstract]

Total net revenue

	Three Months Ended
	March 28, 2015		March 29, 2014
Total net revenues:
United States	$	9,078	6,741
South Korea	14,643		15,889
China	4,001		15,488
Taiwan	14,428		4,416
Other	8,226		9,042
Total net revenues	$	50,376	$	51,576

Long-lived tangible assets

Long-lived tangible assets:	March 28, 2015		December 27, 2014
United States	$	46,011	$	47,729
Japan	65		71
South Korea	249		284
All Other	1,475		1,549
Total long-lived tangible assets	$	47,800	$	49,633

Customers accounted for 10% or more of total accounts receivable

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

	At
	March 28, 2015		December 27, 2014
Samsung Electronics Co. Ltd.	17.3	%	10.0	%
Taiwan Semiconductor Manufacturing Company Limited	27.8	%	20.2	%
SK Hynix	17.5	%	***
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 revenues:

	March 28, 2015		March 29, 2014
Samsung Electronics Co. Ltd.	30.3	%	51.7	%
Intel Corporation	***		13.1	%
SK Hynix	13.4	%	***
Taiwan Semiconductor Manufacturing Company Limited	22.3	%	***

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