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Equity - Stock Options - Valuation assumptions (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 22, 2021
Mar. 31, 2021
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Share-based compensation          
Exercise price (in dollars per share) $ 3.97        
Equity Incentive Plan          
Share-based compensation          
Granted (in shares)   258,618      
Non-vested stock options          
Share-based compensation          
Contractual life   10 years      
Vesting period   2 years      
Fair value of options granted (in dollars)   $ 176,000      
Compensation expense       $ 13,000 $ 13,000
Non-vested stock options | Minimum [Member]          
Share-based compensation          
Exercise price (in dollars per share)   $ 1.16      
Non-vested stock options | Maximum [Member]          
Share-based compensation          
Exercise price (in dollars per share)   $ 2.25      
Non-vested stock options | Non-Qualified Stock Option [Member]          
Share-based compensation          
Granted (in shares)   341,382      
Stock options | Chief Executive Officer [Member] | Non-vested stock options          
Share-based compensation          
Granted (in shares)     600,000