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Note 10 - Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

December 31,

 
   

2021

   

2020

 

Finished goods

  $ 34,899     $ -  

Raw materials, equipment spares and consumables

    76,025       42,995  

Work-in progress

    14,192       10,364  

Total

  $ 125,116     $ 53,359