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Commitments and Contingencies - Narrative (Details) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]      
Term of operating lease (in years) 3 years    
Rent expense $ 76,666 $ 80,472 $ 182,626