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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 3,925us-gaap_InventoryRawMaterialsNetOfReserves $ 3,966us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 1,827us-gaap_InventoryWorkInProcessNetOfReserves 1,609us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 4,102us-gaap_InventoryFinishedGoodsNetOfReserves 3,544us-gaap_InventoryFinishedGoodsNetOfReserves
Total inventories $ 9,854us-gaap_InventoryNet $ 9,119us-gaap_InventoryNet [1]
[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended January 3, 2015.