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Note 10 - Inventory (Tables)
9 Months Ended
Oct. 04, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
October 4,
   
December 31,
 
   
2020
   
2019
 
   
(Unaudited)
     
Raw materials
  $
11,644
    $
15,139
 
Work in process
   
6,875
     
5,889
 
Finished goods
   
1,272
     
1,675
 
Reserve for excess and obsolete inventory
   
(1,947
)    
(1,919
)
Total
  $
17,844
    $
20,784