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Stockholders' Equity - Restricted common stock activity (Details) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Non-vested, Ending balance 50,000  
Restricted common stock    
Non-vested, Beginning balance 191,855 311,535
Granted Number of shares 195,810 110,817
Vested, Number of shares (142,413) (230,497)
Non-vested, Ending balance 245,252 191,855
Non-vested, Beginning balance $ 394,297 $ 412,383
Granted, Fair Value 463,994 322,875
Vested, Fair Value (376,338) (340,961)
Non-vested, Ending balance $ 481,953 $ 394,297
Non-vested, Beginning Balance Weighted Average Grant Date Fair Value $ 2.51 $ 1.66
Granted Weighted Average Grant Date Fair Value 2.37 2.91
Vested Weighted Average Grant Date Fair Value 2.37 1.56
Non-vested, Ending Balance Weighted Average Grant Date Fair Value $ 2.47 $ 2.51