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Note 9 - Inventory (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

March 31,

  

December 31,

 
  

2022

  

2021

 
         
         

Finished goods

 $4,854,866  $4,798,203 

Fabricated assemblies

  101,606   142,457 

Total inventory

 $4,956,472  $4,940,660