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Inventories, Net (Details) - USD ($)
$ in Thousands
Apr. 01, 2016
Jan. 01, 2016
Inventory [Line Items]    
Raw materials and purchased parts $ 2,190 $ 2,317
Work-in-process 2,292 1,995
Finished goods 15,116 15,058
Inventory, Gross 19,598 19,370
Less: inventory reserves 3,579 3,449
Inventory, Net $ 16,019 $ 15,921