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Segmented Information - Schedule of Expenses and Mineral Property Carrying Values by Material Project (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]          
Exploration $ 1,318,444 $ 171,296 $ 1,855,815 $ 446,171  
Land holding costs 122,288 $ 101,591 276,900 195,237  
Mineral properties, net 46,460,386   46,460,386   $ 25,674,658
Sleeper Gold Project          
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]          
Exploration     342,951 446,171  
Land holding costs     219,280 $ 195,237  
Mineral properties, net 25,674,658   25,674,658   $ 25,674,658
Grassy Mountain Project          
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]          
Exploration     1,512,864    
Land holding costs     57,620    
Mineral properties, net $ 20,785,728   $ 20,785,728