Income and Other Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax benefit computed at U.S. federal statutory rate	$ (10,368)	$ (8,589)
State tax expense (benefit), net of U.S. federal effect	54	(27)
Foreign tax rate differential	355	(7)
Shortfall from stock based compensation	1,204	141
Other	20	85
Federal benefit on PPP loan forgiveness	15	0
Net operating loss carryforward expiration	12,839	11,705
Change in valuation allowance	(4,077)	(3,447)
Total income tax expense (benefit)	$ 42	$ (139)
Effective tax rate (percentage)	0.10%	(0.30%)