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Note 10 - Inventory (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

June 30,

  

December 31,

 
  

2021

  

2020

 
         

Finished goods

 $2,092,622  $221,130 

Fabricated assemblies

  198,006   109,817 

Total inventory

 $2,290,628  $330,947