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Note 14 - Segment Data (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 02, 2017
USD ($)
Jul. 03, 2016
USD ($)
Jul. 02, 2017
USD ($)
Jul. 03, 2016
USD ($)
Number of Operating Segments     2  
Revenues $ 21,249 $ 23,504 $ 39,434 $ 50,442
Intersegment Eliminations [Member]        
Revenues     $ 0 $ 0