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Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Capitalized Contract Cost [Line Items]    
Current contract assets $ 4,400,000 $ 2,700,000
Non-current contract assets 0  
Current contract liabilities 1,900,000 900,000
Non-current contract liabilities   400,000
Revenue recognized included in contract liabilities $ 1,700,000  
Practical Expedient, Incremental Costs true  
Current capitalized costs $ 128,000 137,000
Non-current capitalized costs 0  
Incremental costs amortized 366,000 442,000
Impairment related to costs capitalized $ 0 0
Payment terms 30 days  
Remaining Performance Obligation, Optional Exemption true  
Minimum    
Capitalized Contract Cost [Line Items]    
Amortization Period 3 years  
Maximum    
Capitalized Contract Cost [Line Items]    
Amortization Period 6 years  
TS    
Capitalized Contract Cost [Line Items]    
Current capitalized costs $ 9,000 13,000
Non-current capitalized costs 0 9,000
Incremental costs amortized 13,000 13,000
Impairment related to costs capitalized $ 0 $ 0
Europe | Maximum    
Capitalized Contract Cost [Line Items]    
Payment terms 90 days