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Note 18 - Commitments (Details Textual)
 1 Months Ended 12 Months Ended
Dec. 07, 2022
CAD ($)
Dec. 14, 2012
USD ($)
Nov. 15, 2011
Dec. 31, 2022
USD ($)
Dec. 31, 2022
BRL (R$)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
May 31, 2019
BRL (R$)
Sep. 30, 2018
BRL (R$)
Dec. 31, 2022
USD ($)
Nov. 30, 2021
CAD ($)
Statement Line Items [Line Items]                      
Low-value assets                     $ 3,023
Short-term leases assets                     $ 75,710
Jarbas agreement, exploration licenses [member]                      
Statement Line Items [Line Items]                      
Purchase of intangible assets                   $ 628,660  
Altoro agreement, exploration licenses [member]                      
Statement Line Items [Line Items]                      
Purchase of intangible assets   $ 850,000                  
Payments to counterparty upon ANM granting mining license over exploration concession   $ 650,000                  
Surfacec rights lease payment [member]                      
Statement Line Items [Line Items]                      
Surface rights lease agreement, payment       $ 55,000   $ 25,000 $ 25,000        
Option agreement, option payment $ 650,000                    
Boa Vista Gold Inc. [member]                      
Statement Line Items [Line Items]                      
Payments to counterparty | R$               R$ 400,000 R$ 3,620,000    
Boa Vista Gold Inc. [member] | Mineral rights agreement [member]                      
Statement Line Items [Line Items]                      
Payments to counterparty | R$         R$ 3,220,000            
D'Gold [member]                      
Statement Line Items [Line Items]                      
Net smelter return royalty, percentage     1.50%                
D'Gold [member] | Additional payable if holdings drop below 10% [member]                      
Statement Line Items [Line Items]                      
Net smelter return royalty, percentage     1.50%