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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

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