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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Oct. 04, 2014
Dec. 28, 2013
Oct. 05, 2013
Inventory [Line Items]      
Raw materials $ 6,125 $ 3,317 $ 4,477
Work in progress 5,269 3,357 4,299
Finished goods 21,788 12,267 20,891
Total Inventory $ 33,182 $ 18,941 $ 29,667