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Summary of Significant Accounting Policies - Net Loss Per Common Share (Details) - shares
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 3,422,389 2,807,759
Liability Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 24,105 24,105
Equity Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 1,254,952 2,288,454
Employee stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 109,588 76,594
Restricted Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 1,955,426 418,606
Employee unvested restricted stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Antidilutive securities 78,318