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Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Sep. 30, 2018
Debt [Abstract]    
Long-term Debt, Excluding Current Maturities $ 19,672 $ 29,564
Revolving Credit Facility [Member]    
Line Of Credit Facility [Line Items]    
Line Of Credit Facility Interest Rate At Period End 4.52% 3.86%
Letters of Credit Outstanding, Amount $ 6,551  
Excess Availability $ 71,698