Operating Leases - Schedule of Lease Expense and Cash Payments & Weighted-Average Remaining Lease Term and Discount Rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating lease expense	$ 3,411	$ 1,146	$ 6,844	$ 2,309
Cash payments on lease liabilities	$ 2,189	$ 1,168	$ 4,089	$ 2,281
Weighted-average remaining lease term	4 years 9 months 18 days	6 years 4 months 24 days	4 years 9 months 18 days	6 years 4 months 24 days
Weighted-average discount rate	4.93%	6.34%	4.93%	6.34%