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Debt - Term Loans (Details)
$ in Thousands
3 Months Ended
Dec. 31, 2020
USD ($)
loan
installment
Jul. 01, 2019
loan
Debt Instrument [Line Items]    
Deferred financing costs $ 371  
Outstanding principal balance $ 50,414  
Secured Debt    
Debt Instrument [Line Items]    
Number of term loans | loan   2
Secured Debt | Five-year Term Loans Maturing 2021    
Debt Instrument [Line Items]    
Number of term loans | loan 3  
Debt instrument, term 5 years  
Face amount $ 3,300  
Number of installments | installment 8  
Installment payment, percentage of initial principal amount (as a percent) 12.50%  
Deferred financing costs $ 0  
Outstanding principal balance $ 400  
Secured Debt | Five-year Term Loans Maturing 2021 | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Debt instrument, basis spread on variable rate (as a percent) 3.10%  
Secured Debt | One-year Term Loans Maturing 2019    
Debt Instrument [Line Items]    
Number of term loans | loan 2  
Debt instrument, term 1 year  
Face amount $ 3,200  
Secured Debt | One-year Term Loans Maturing 2019, Loan One    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage (as a percentage) 4.56%  
Secured Debt | One-year Term Loans Maturing 2019, Loan Two    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage (as a percentage) 4.35%