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MINERAL PROPERTY INTERESTS (Narrative) (Details)
1 Months Ended
May 14, 2018
USD ($)
Jun. 07, 2017
USD ($)
Apr. 03, 2017
USD ($)
Jan. 06, 2017
USD ($)
Jan. 25, 2017
USD ($)
shares
Aug. 30, 2016
USD ($)
Apr. 30, 2022
$ / shares
Apr. 30, 2022
USD ($)
Jul. 31, 2021
$ / shares
Jul. 31, 2021
USD ($)
Jul. 31, 2020
$ / shares
Jul. 31, 2020
USD ($)
Jul. 31, 2019
$ / shares
Jan. 25, 2017
$ / shares
Jan. 25, 2017
USD ($)
Mineral Property Interests [Line Items]                              
Warrant exercise price | $ / shares             $ 0.95   $ 1.14   $ 1.27   $ 1.57    
Idaho Maryland Gold Mine Property [Member]                              
Mineral Property Interests [Line Items]                              
Percentage of interest acquired           100.00%                 100.00%
Payments for non-refundable cash deposit           $ 25,000                  
Purchase price         $ 1,950,000                    
Payments for commissions         $ 140,000                    
Commission percentage on purchase price         7.00%                    
Number of units issued | shares         92,000                    
Issuance price per unit | $ / shares                           $ 2  
Warrant exercise price | $ / shares                           $ 4  
Transaction costs                             $ 109,053
Cumulative exploration expenditures               $ 7,507,353   $ 7,169,662   $ 6,387,402      
Idaho Maryland Gold Mine Property [Member] | Series of Individually Immaterial Asset Acquisitions [Member]                              
Mineral Property Interests [Line Items]                              
Purchase price for acquisition of assets           $ 2,000,000                  
Sierra Pacific Industries Inc [Member]                              
Mineral Property Interests [Line Items]                              
Percentage of interest acquired                             100.00%
Payments for non-refundable cash deposit       $ 100,000                      
Cash payment $ 1,300,000 $ 300,000 $ 200,000                        
Payment due in order to exercise option   $ 1,300,000 $ 1,600,000                        
Sierra Pacific Industries Inc [Member] | Series of Individually Immaterial Asset Acquisitions [Member]                              
Mineral Property Interests [Line Items]                              
Purchase price for acquisition of assets       $ 1,900,000