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Property, Plant and Equipment, Net (Details Textual) - USD ($)
12 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Jan. 01, 2016
Property, Plant and Equipment [Line Items]      
Depreciation, Total $ 3,133,000 $ 2,664,000 $ 2,196,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property (623,000) $ (222,000) $ 0
Gain (Loss) on Sale of Assets and Asset Impairment Charges $ 599,000