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Note 11 - Segment Data (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 04, 2021
USD ($)
Jul. 05, 2020
USD ($)
Jul. 04, 2021
USD ($)
Jul. 05, 2020
USD ($)
Number of Operating Segments     2  
Revenue from Contract with Customer, Including Assessed Tax $ 25,969 $ 17,153 $ 45,951 $ 39,578
Intersegment Eliminations [Member]        
Revenue from Contract with Customer, Including Assessed Tax $ 0 $ 0 $ 0 $ 0