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Promissory Note Receivable - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Mar. 10, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Proceeds from promissory note receivable $ 1,505 $ 584  
Proceeds from promissory note receivable prepayment 1,000    
Promissory note, amount outstanding $ 2,300    
Loan Agreement with Primary Financial Leader      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Debt instrument, face amount     $ 3,500
Promissory Note      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Notes receivable, interest rate 6.00%