Geographic and Significant Customer Information (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
Total net revenues:
Total long-lived tangible assets	$ 47,131	$ 47,439
United States [Member]
Total net revenues:
Long-lived tangible assets	44,545	44,775
Japan [Member]
Total net revenues:
Long-lived tangible assets	122	125
South Korea [Member]
Total net revenues:
Long-lived tangible assets	401	445
All Other [Member]
Total net revenues:
Long-lived tangible assets	$ 2,063	$ 2,094