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Leases - Future minimum lease payments (Details) - USD ($)
Dec. 31, 2022
Sep. 30, 2022
Future minimum lease payments under operating leases    
2023 $ 14,676  
2024 13,453  
Total minimum lease payments 28,129  
Amount representing interest (2,915)  
Present value of minimum lease payments 25,214  
Current portion (13,450) $ (13,615)
Long-term portion of lease obligations $ 11,764  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other Liabilities, Noncurrent