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Stock Options and Warrants - Stock Warrants (Details) - USD ($)
12 Months Ended
Jul. 19, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Shares, Granted 300,000        
Stock Warrants [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Shares, Outstanding   6,969,588 6,673,860 6,616,700  
Number of Shares, Granted   6,990,174 295,728 57,160  
Number of Shares, Exercised   0 0 0  
Number of Shares, Expired   5,996,649 0 0  
Number of Shares, Canceled   0 0 0  
Number of Shares, Outstanding   7,963,113 6,969,588 6,673,860 6,616,700
Weighted Average Exercise Price per share, Outstanding (dollars per share)   $ 4.80 $ 4.93 $ 4.96  
Weighted Average Exercise Price per share, Granted (dollars per share)   0.61 1.87 1.71  
Weighted Average Exercise Price per share, Exercised (dollars per share)   0 0 0  
Weighted Average Exercise Price per share, Expired (dollars per share)   5.08 0 0  
Weighted Average Exercise Price per share, Canceled (dollars per share)   0 0 0  
Weighted Average Exercise Price per share, Outstanding (dollars per share)   $ 0.91 $ 4.80 $ 4.93 $ 4.96
Weighted Average Remaining Contractual Term (years), Granted   0 years 0 years 0 years  
Weighted Average Remaining Contractual Term (years), Exercised   0 years 0 years 0 years  
Weighted Average Remaining Contractual Term (years), Expired   0 years 0 years 0 years  
Weighted Average Remaining Contractual Term (years), Canceled   0 years 0 years 0 years  
Weighted Average Remaining Contractual Term (years), Outstanding   4 years 8 months 9 days 6 months 11 days 1 year 4 months 10 days 2 years 6 months 18 days
Aggregate Intrinsic Value, Outstanding (in dollars)   $ 0 $ 0 $ 0 $ 4,459
Aggregate Intrinsic Value, Granted (in dollars)   0 0 0  
Aggregate Intrinsic Value, Exercised (in dollars)   0 0 0  
Aggregate Intrinsic Value, Expired (in dollars)   0 0 0  
Aggregate Intrinsic Value, Cancelled (in dollars)   $ 0 $ 0 $ 0