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Note 4 - Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

December 31,

 
  

2020

  

2019

 

Finished goods

 $73,979  $65,413 

Work in process

  1,634   652 

Raw materials

  14,153   7,314 

Inventories

 $89,766  $73,379