Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details)

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Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details)
6 Months Ended 12 Months Ended
Mar. 31, 2022
Sep. 30, 2021
US Treasuries and FDIC Insured    
Concentration Risk [Line Items]    
Percentage of cash balances 77.00% 83.00%
Accounts Receivable | Customer Concentration Risk | Customer One    
Concentration Risk [Line Items]    
Concentration risk, percentage 28.00% 14.00%