Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

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

	September 30, 2020
	Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable (Level 3)
Executive savings plan assets	$	766	$	766	$	—
Executive savings plan liabilities	(644)		(644)		—
Total	$	122	$	122	$	—

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

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

	Contingent Consideration Agreement
Fair Value at September 30, 2019	$	11
Issuances	—
Settlements	—
Net adjustments to fair value	(11)
Fair Value at September 30, 2020	$	—