Financing Agreement - Interest Expense Recognized Related to Credit Facility (Details) - Secured Debt - Financing Agreement - Line of Credit - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Line of Credit Facility [Line Items]
Amortization of debt discount and issuance costs	$ 1,906	$ 317	$ 0
Accretion of the MOIC Payment	3,478	0	0
Contractual interest expense	57,941	9,000	0
Total interest expense	$ 63,325	$ 9,317	$ 0