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Note 5 - Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30, 2022

  

December 31, 2021

 
         

Raw materials

 $1,804,675  $1,030,955 

Work-in-process

  329,092   194,060 

Inventories

 $2,133,767  $1,225,015