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Stockholders' Equity (Details 1)
9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Expected dividend yield 0.00% 0.00%
Maximum [Member]    
Risk-free interest rate 3.00% 2.60%
Expected life (in years) 6 years 6 years
Expected volatility 69.00% 76.00%
Minimum [Member]    
Risk-free interest rate 2.82% 1.45%
Expected life (in years) 5 years 2 years 7 months 6 days
Expected volatility 68.00% 70.00%