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Note 10 - Inventories (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2022

  

2021

 

Finished goods

 $28,166  $34,899 

Raw materials, equipment spares and consumables

  98,087   76,025 

Work-in-progress

  9,472   14,192 

Total

 $135,725  $125,116