Income Taxes - Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Current:
Federal	$ 148	$ 1,074	$ 0
State	375	1,710	304
Foreign	(3,290)	0	3,481
Total current tax	(2,767)	2,784	3,785
Deferred:
Federal	0	0	0
State	0	0	0
Foreign	0	0	0
Total deferred tax	0	0	0
Income tax provision	$ (2,767)	$ 2,784	$ 3,785