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Note 13 - Segment Data (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 04, 2020
USD ($)
Sep. 29, 2019
USD ($)
Oct. 04, 2020
USD ($)
Sep. 29, 2019
USD ($)
Number of Operating Segments     2  
Revenue from Contract with Customer, Including Assessed Tax $ 22,154 $ 22,259 $ 61,732 $ 66,267
Intersegment Eliminations [Member]        
Revenue from Contract with Customer, Including Assessed Tax $ 0 $ 0 $ 0 $ 0