Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Fair Value of Options Granted using the Black-Scholes option pricing model (Details)

v3.19.2
Share-Based Compensation - Fair Value of Options Granted using the Black-Scholes option pricing model (Details)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Risk-free interest rate 2.45%  
Dividend yield 0.00% 0.00%
Volatility, Minimum   103.00%
Volatility, Maximum 97.50% 103.72%
Expected term (in years) 9 years 9 years
Minimum [Member]    
Risk-free interest rate   2.15%
Maximum [Member]    
Risk-free interest rate   2.94%