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Note 3 - Prepaid Expenses and Other Current Assets (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

September 30,

2021

  

December 31,

2020

 
         

Prepaid expenses

 $2,403  $1,030 

Tax Receivable – Canadian GST

  7,079   5,052 
  $9,482  $6,082