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Commitments and Contingencies (Details 3) - $ / shares
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average remaining contractual life (in years) 6 years 9 months 14 days 6 years 11 months 15 days
Equity Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of outstanding options 11,330,903  
Number of vested options 7,228,488  
Equity Option [Member] | Option Price 1 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of exercise prices, lower range limit $ 0.92  
Range of exercise prices, upper range limit $ 2.96  
Number of outstanding options 4,309,349  
Weighted average remaining contractual life (in years) 6 years 3 months  
Weighted average exercise price $ 2.31  
Number of vested options 3,167,682  
Weighted average exercise price $ 2.10  
Equity Option [Member] | Option Price 2 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of exercise prices, lower range limit 3.15  
Range of exercise prices, upper range limit $ 4.80  
Number of outstanding options 2,117,500  
Weighted average remaining contractual life (in years) 6 years 3 months 29 days  
Weighted average exercise price $ 3.30  
Number of vested options 1,830,836  
Weighted average exercise price $ 3.29  
Equity Option [Member] | Option Price 3 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of exercise prices, lower range limit 5.04  
Range of exercise prices, upper range limit $ 8.98  
Number of outstanding options 3,397,054  
Weighted average remaining contractual life (in years) 6 years 5 months 12 days  
Weighted average exercise price $ 6.05  
Number of vested options 2,207,054  
Weighted average exercise price $ 6.35  
Equity Option [Member] | Option Price 4 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of exercise prices, lower range limit 12.00  
Range of exercise prices, upper range limit $ 13.01  
Number of outstanding options 230,000  
Weighted average remaining contractual life (in years) 9 years 6 months 7 days  
Weighted average exercise price $ 12.44  
Number of vested options 22,916  
Weighted average exercise price $ 12.42  
Equity Option [Member] | Option Price 5 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of exercise prices, lower range limit 18.11  
Range of exercise prices, upper range limit $ 24.58  
Number of outstanding options 1,277,000  
Weighted average remaining contractual life (in years) 9 years 9 months 25 days  
Weighted average exercise price $ 19.33  
Number of vested options  
Weighted average exercise price