Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Executive savings plan assets	$ 713	$ 641
Executive savings plan liabilities	(599)	(529)
Contingent consideration	(795)	(786)
Total fair value net asset (liability)	(681)	(674)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Executive savings plan assets	713	641
Executive savings plan liabilities	(599)	(529)
Total 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	(795)	(786)
Total fair value net asset (liability)	$ (795)	$ (786)