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Warrants (Details) - Warrants
12 Months Ended
Jun. 30, 2020
Dividend yield 0.00%
Minimum  
Expected volatility 100.00%
Equivalent term (years) 1 year
Risk-free rate 0.20%
Maximum  
Expected volatility 153.00%
Equivalent term (years) 5 years
Risk-free rate 1.91%