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Equity Incentive plan (Tables)
3 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of stock option activity
     Number of Options      Weighted Average Exercise Price      Weighted Average Remaining Contractual Life in Years  
Outstanding June 30, 2019     1,607     $ 325.73       6.13  
   Expired     (51 )     328.00          
Outstanding September 30, 2019     1,556       325.66       6.08  
Exercisable at September 30, 2019     1,544     $ 325.64       6.08  
Schedule of restricted stock activity
     Number of Shares      Weighted Average Grant Date Fair Value      Weighted Average Remaining Contractual Life in Years  
                   
 Unvested at June 30, 2019     2,436,214     $ 1.83       9.1  
 Granted                    
 Vested                    
 Forfeited     (5,150 )   $ 2.44          
 Unvested at September 30, 2019     2,431,064     $ 1.83       7.2  
Schedule of stock-based compensation expense
     Three Months Ended September 30,  
 Selling, general and administrative:   2019     2018  
Stock options   $ 5,000     $ 66,000  
Restricted stock     160,000       86,000  
 Total stock-based compensation expense   $ 165,000     $ 152,000