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Segment, Geographic, Product and Significant Customer Information (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2013
Dec. 29, 2012
Long-lived tangible assets:    
Total long-lived tangible assets $ 47,439 $ 43,213
United States [Member]
   
Long-lived tangible assets:    
Long-lived tangible assets 44,775 40,600
Japan [Member]
   
Long-lived tangible assets:    
Long-lived tangible assets 125 148
South Korea [Member]
   
Long-lived tangible assets:    
Long-lived tangible assets 445 520
All other [Member]
   
Long-lived tangible assets:    
Long-lived tangible assets $ 2,094 $ 1,945