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Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 30, 2016
Jan. 01, 2016
Property, Plant and Equipment [Line Items]    
Machinery and equipment $ 19,807 $ 17,094
Furniture and fixtures 8,025 6,980
Leasehold improvements 9,179 8,611
Property, Plant and Equipment, Gross 37,011 32,685
Less: accumulated depreciation 25,221 22,590
Property, plant and equipment, net $ 11,790 $ 10,095