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Note 6 - Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

June 30,

  

December 31,

 
  

2021

  

2020

 

Raw materials

 $53,211  $40,846 

Work in progress

  29,580   25,916 

Finished goods

  33,379   33,371 

Inventories

 $116,170  $100,133