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Summary of Operations and Significant Accounting Policies - Revenue Recognition - Additional Information (Details)
12 Months Ended
Sep. 30, 2021
Disaggregation of Revenue [Line Items]  
Performance obligation remaining, original duration 1 year
Revenue remaining performance obligation true
Practical expedient, incremental cost of obtaining contract true
Amortization period 1 year
Minimum | Equipment Sales  
Disaggregation of Revenue [Line Items]  
Warranty period 12 months
Maximum | Equipment Sales  
Disaggregation of Revenue [Line Items]  
Warranty period 24 months