Income Taxes - Schedule of Income Taxes from Continuing Operations Before Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Current income tax provision (benefit):
U.S. federal	$ 0	$ 70
U.S. state and local	9	1
Non-U.S.	167	(46)
Total current tax provision	176	25
Deferred income tax provision:
U.S. federal	9	10
U.S. state and local	0	2
Total deferred tax provision	9	12
Income tax provision	$ 185	$ 37