Supporting Financial Information - Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense	$ 14,153	$ 1,574
Interest income	(64)	(23)
Amortization of deferred financing costs	2,182	664
Interest expense	$ 16,271	$ 2,215