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Commitments and Contingencies - Lease cost (Details) - USD ($)
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2021
Leases      
Operating lease term     3 years
Lease cost      
Interest on lease liabilities $ 3,141 $ 5,093  
Total finance lease cost 3,141 5,093  
Operating lease cost 44,867 106,879  
Total lease cost $ 48,008 $ 111,972  
Minimum      
Leases      
Finance lease term 12 months    
Finance lease interest (as a percent) 4.00%    
Maximum      
Leases      
Finance lease term 36 months    
Finance lease interest (as a percent) 13.00%