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Note 4 - Prepaid Expenses and Other Current Assets (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   

March 31,

   

December 31,

 
   

2023

   

2022

 
                 

Prepaid expenses

  $ 12,076     $ 28,028  

Tax Receivable – Canadian GST

    1,652       2,210  
    $ 13,728     $ 30,238