Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	March 31, 2020
			Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable Inputs (Level 3)
Executive savings plan assets		$	673	$	673	$	—
Executive savings plan liabilities			(559)		(559)		—
Contingent consideration			(11)		—		(11)
Total		$	103	$	114	$	(11)

	September 30, 2019
			Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable Inputs (Level 3)
Executive savings plan assets		$	763	$	763	$	—
Executive savings plan liabilities			(646)		(646)		—
Contingent consideration			(11)		—		(11)
Total		$	106	$	117	$	(11)

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		Contingent Consideration Agreements
Fair value at September 30, 2019	$	11
Settlements		—
Net adjustments to fair value		—
Fair value at March 31, 2020	$	11