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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Executive Savings Plan - Assets $ 686 $ 641
Executive Savings Plan - Liabilities (572) (529)
Contingent Consideration Fair Value 467 786
Fair Value Net Asset (Liability) (353) (674)
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Executive Savings Plan - Assets 686 641
Executive Savings Plan - Liabilities (572) (529)
Fair Value Net Asset (Liability) 114 112
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent Consideration Fair Value 467 786
Fair Value Net Asset (Liability) $ 467 $ 786