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Costs Incurred (Details)
12 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Nov. 29, 2010
a
Acquisition of mineral interests $ 0 $ 0  
Exploration costs and claim rentals 14,425 492,600  
Total costs incurred $ 14,425 $ 492,600  
Native Village of Tetlin Land [Member]      
Initial and Renewal Terms of Leases and Concessions on Undeveloped Acreage 10 years    
Leasehold Interest Acreage | a     675,000