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Commitments and Contingencies (Details 4)
6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]    
Risk-free interest rate 3.69% 1.40%
Expected life of options (years) 5 years 7 months 9 days 4 years 10 months 24 days
Annualized volatility 85.28% 95.88%
Dividend rate 0.00% 0.00%