Inventories, Net (Details) (USD $) In Thousands, unless otherwise specified	Oct. 03, 2014	Jan. 03, 2014
Public Utilities, Inventory [Line Items]
Raw materials and purchased parts	$ 2,077	$ 1,367
Work-in-process	2,147	913
Finished goods	12,861	11,029
Inventory, Gross	17,085	13,309
Less: inventory reserves	1,354	795
Inventory, Net	$ 15,731	$ 12,514