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Reclamation and Environmental Obligation - Changes to Asset Retirement Obligation (Details) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]    
Balance at beginning of year $ 615,170 $ 965,677
Accretion (Note 8) 60,040 94,591
Change in reclamation and environmental obligation 1,498,950 278,181
Settlements (324,516) (723,279)
Balance at end of year $ 1,849,644 $ 615,170