Income Taxes - Income Tax Benefit from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
(Loss) before income tax benefit	$ (9,683)	$ (1,965)
Income tax (benefit) at U.S. federal statutory rates	(2,033)	(413)
Tax effect of:
Foreign rate differential	(46)	(193)
Permanent items	(1,032)	27
State and local income taxes	18	6
Federal tax credits	(157)	(145)
Valuation allowance	3,198	601
Prior year tax adjustments	0	(1,115)
Other	9	10
Income tax benefit	$ (43)	$ (1,222)