Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

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

	September 30, 2023
	Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable (Level 3)
Executive savings plan assets	$	783	$	783	$	—
Executive savings plan liabilities	(657)		(657)		—
Contingent consideration liability	(4,465)		—		(4,465)

	September 30, 2022
	Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable (Level 3)
Executive savings plan assets	$	706	$	706	$	—
Equity securities	1,937		$	1,937	—
Executive savings plan liabilities	(585)		(585)		—
Contingent consideration liability	(4,323)		—		(4,323)

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

	Contingent Consideration Agreement
Fair value at September 30, 2021	$	(4,181)
Net adjustments to fair value	(142)
Fair value at September 30, 2022	$	(4,323)
Net adjustments to fair value	(142)
Fair value at September 30, 2023	$	(4,465)