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Indebtedness - Schedule of Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Debt Instrument [Line Items]    
Total loans $ 48,118  
Less unamortized issuance costs (2,577)  
Less current maturities of long-term debt 0 $ (1,972)
Total long-term debt, net of current portion 45,541  
Revolving loan    
Debt Instrument [Line Items]    
Total loans $ 48,118