Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jul. 03, 2015	Jan. 02, 2015
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 16,388	$ 15,674
Furniture and fixtures	6,589	6,535
Leasehold improvements	8,420	8,400
Property, Plant and Equipment, Gross	31,397	30,609
Less: accumulated depreciation	21,466	20,543
Property, Plant and Equipment, Net	$ 9,931	$ 10,066