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Summary of Significant Accounting Policies, Software Development and Cloud Computing Arrangement Implementation Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Software Development and Cloud Computing Arrangement Implementation Costs [Abstract]      
Estimated useful lives of assets 10 years    
Intangible asset non-current $ 306,471 $ 85,294 $ 61,304
Domain Names & Internally Developed Software [Member] | Minimum [Member]      
Software Development and Cloud Computing Arrangement Implementation Costs [Abstract]      
Estimated useful lives of assets 3 years    
Domain Names & Internally Developed Software [Member] | Maximum [Member]      
Software Development and Cloud Computing Arrangement Implementation Costs [Abstract]      
Estimated useful lives of assets 5 years    
Cloud Computing Arrangements [Member]      
Software Development and Cloud Computing Arrangement Implementation Costs [Abstract]      
Expected amortization recognition period 1 year    
Intangible asset current $ 0 0  
Intangible asset non-current $ 1,700 $ 0