Segment, Geographic, Product and Significant Customer Information - Long-lived Tangible Assets (Details) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Long-lived tangible assets:
Total long-lived tangible assets	$ 44,493	$ 49,633
United States [Member]
Long-lived tangible assets:
Total long-lived tangible assets	42,581	47,729
Japan [Member]
Long-lived tangible assets:
Total long-lived tangible assets	59	71
South Korea [Member]
Long-lived tangible assets:
Total long-lived tangible assets	697	284
Taiwan [Member]
Long-lived tangible assets:
Total long-lived tangible assets	1,056	1,473
All other [Member]
Long-lived tangible assets:
Total long-lived tangible assets	$ 100	$ 76