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Note 5 - Accounts Payable and Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

March 31,

2023

  

December 31,

2022

 
         

Accounts payable

 $265,114  $224,716 

Accrued fees and expenses

  37,092   51,869 
  $302,206  $276,585