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Note 5 - Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

December 31,

 
  

2020

  

2019

 

Raw materials

 $12,229  $10,540 

Work in process

  1,991   2,279 

Finished goods

  4,422   5,457 

Total Inventory

 $18,642  $18,276