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Note 9 - Inventory (Details) - Inventory (USD $)
In Thousands, unless otherwise specified
Apr. 05, 2015
Dec. 31, 2014
Inventory [Abstract]    
Raw materials $ 16,797us-gaap_InventoryRawMaterials $ 16,687us-gaap_InventoryRawMaterials
Work in process 13,564us-gaap_InventoryWorkInProcess 11,702us-gaap_InventoryWorkInProcess
Finished goods 6,051us-gaap_InventoryFinishedGoods 6,991us-gaap_InventoryFinishedGoods
Reserve for excess and obsolete inventory (6,420)us-gaap_InventoryValuationReserves (6,349)us-gaap_InventoryValuationReserves
$ 29,992us-gaap_InventoryNet $ 29,031us-gaap_InventoryNet