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Capital Stock - Summary of Warrant Activity (Details) - Warrants - $ / shares
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Class Of Warrant Or Right [Line Items]    
Warrants, Outstanding, Beginning Balance 1,045,000  
Warrants, Outstanding, Ending Balance 1,045,000 1,045,000
Weighted Average Exercise Price, Outstanding, Beginning Balance $ 2.13  
Weighted Average Exercise Price, Outstanding, Ending Balance $ 2.13 $ 2.13
Weighted-Average Remaining Contractual Term (Years), Outstanding 8 months 1 day 1 year 8 months 1 day