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Inventories, Net (Details) - USD ($)
$ in Thousands
Jan. 01, 2016
Jan. 02, 2015
Public Utilities, Inventory [Line Items]    
Raw materials and purchased parts $ 2,317 $ 2,146
Work in process 1,995 1,781
Finished goods 15,058 14,504
Inventory, Gross 19,370 18,431
Less inventory reserves 3,449 2,714
Inventory, Net $ 15,921 $ 15,717