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Supporting Financial Information - Debt Obligations (Details) - Debt obligations - USD ($)
$ in Thousands
Mar. 31, 2019
Sep. 30, 2018
Debt Instrument [Line Items]    
Bank term loan $ 0 $ 7,708
Less unamortized debt issuance costs 0 (750)
Net bank debt obligation 0 6,958
Less current portion of bank debt obligations 0 0
Long term portion of bank debt obligation $ 0 $ 6,958