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Supporting Financial Information - Maturities of Debt Obligations (Details) - Debt obligations - USD ($)
$ in Thousands
Dec. 31, 2018
Sep. 30, 2018
Debt Instrument [Line Items]    
Fiscal 2019 $ 0  
Fiscal 2020 1,562  
Fiscal 2021 5,833  
Total bank debt obligation $ 7,395 $ 7,708