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Note 9 - Prepaid Expenses and Other (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

June 30,

  

December 31,

 
  

2021

  

2020

 
         
         

Deposit for inventory

 $1,446,471  $66,995 

Other prepaid expenses

  107,786   64,178 

Insurance

  16,428   45,468 

Software licenses

  41,414   24,866 

Total prepayments

 $1,612,099  $201,507