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Net Loss Per Common Share (Tables)
6 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Securities excluded from the calculation of diluted earnings per share
      Six Months Ended  
      December 31  
      2019     2018  
Warrants to purchase common stock - liability classified  (Note 15)     240,755       240,755  
Warrant to purchase common stock - equity classified  (Note 15)     26,218,908       12,065,506  
Employee stock options  (Note 14)     1,482       1,787  
Employee unvested restricted stock  (Note 14)     2,307,854       2,744,912  
Performance-based options  (Note 14)           75,000  
Convertible preferred stock  (Note 13)     10,215,845       4,532,664  
      38,984,844       19,660,624