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Note 10 - Inventory (Tables)
6 Months Ended
Jul. 05, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
July 5,
   
December 31,
 
   
2020
   
2019
 
   
(Unaudited)
   
 
 
 
Raw materials
  $
12,562
    $
15,139
 
Work in process
   
6,340
     
5,889
 
Finished goods
   
1,491
     
1,675
 
Reserve for excess and obsolete inventory
   
(1,908
)    
(1,919
)
Total
  $
18,485
    $
20,784