Segment, Geographic, Product and Significant Customer Information - Long-lived Tangible Assets (Details) - USD ($) $ in Thousands	Mar. 26, 2016	Dec. 26, 2015
Long-lived tangible assets:
Total long-lived tangible assets	$ 43,068	$ 44,493
United States [Member]
Long-lived tangible assets:
Total long-lived tangible assets	41,281	42,581
Japan [Member]
Long-lived tangible assets:
Total long-lived tangible assets	63	59
South Korea [Member]
Long-lived tangible assets:
Total long-lived tangible assets	664	697
All other [Member]
Long-lived tangible assets:
Total long-lived tangible assets	$ 1,060	$ 1,156