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Stockholders' Equity (Details 1)
9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Expected dividend yield 0.00% 0.00%
Maximum [Member]    
Risk-free interest rate 2.60% 2.06%
Expected life (in years) 6 years 6 years
Expected volatility 76.00% 81.00%
Minimum [Member]    
Risk-free interest rate 1.45% 1.27%
Expected life (in years) 2 years 7 months 6 days 5 years
Expected volatility 70.00% 78.00%