Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details)
9 Months Ended 12 Months Ended
Jun. 30, 2020
Sep. 30, 2019
US Treasuries and FDIC Insured    
Concentration Risk [Line Items]    
Percentage of cash balances 89.00% 79.00%
Customer One | Accounts Receivable | Customer Concentration Risk    
Concentration Risk [Line Items]    
Concentration risk, percentage 12.00% 15.00%