Income Taxes - Income Tax Benefit from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Loss before income tax provision (benefit)	$ (8,533)	$ (9,683)
Income tax provision (benefit) at U.S. federal statutory rates	(1,792)	(2,033)
Tax effect of:
Foreign rate differential	(331)	(46)
Permanent items	83	(1,032)
State and local income taxes	5	18
Federal tax credits	(179)	(157)
Valuation allowance	2,363	3,198
Other	10	9
Income tax provision (benefit)	$ 159	$ (43)