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Inventories, Net (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 03, 2014
Dec. 28, 2012
Public Utilities, Inventory [Line Items]    
Raw materials and purchased parts $ 1,367 $ 1,946
Work-in-process 913 1,318
Finished goods 11,029 8,945
Inventory, Gross 13,309 12,209
Less inventory reserves 795 536
Inventory, Net $ 12,514 $ 11,673