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Income Taxes - Reconciliation of Income tax expense (benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Taxes
Computed "expected" tax expense (benefit) (in Dollars)	$ 407	$ 240
Computed "expected" tax expense (benefit)	21.00%	21.00%
Increases (reductions) in taxes resulting from:
State income taxes, net of federal tax benefit (in Dollars)	$ 27	$ (38)
State income taxes, net of federal tax benefit	1.50%	(3.30%)
Foreign rate differential (in Dollars)	$ (30)	$ 13
Foreign rate differential	(1.50%)	1.10%
Exclusion of PPP Loan Forgiveness Income (in Dollars)	$ 0	$ (458)
Exclusion of PPP Loan Forgiveness Income	0.00%	(40.10%)
Exclusion of the UK's Gain on Sale of Disc Ops Entity (in Dollars	$ 0	$ (98)
Exclusion of the UK's Gain on Sale of Disc Ops Entity	0.00%	(8.60%)
Permanent differences (in Dollars)	$ (19)	$ (22)
Permanent differences	(1.00%)	(1.90%)
Change in valuation allowance (in Dollars)	$ (226)	$ 1,598
Change in valuation allowance	(11.50%)	139.80%
Research and development credit (in Dollars)	$ (131)	$ (116)
Research & development credit	(6.80%)	(10.10%)
Benefit of US Federal NOL carryback (in Dollars)	$ 0	$ (359)
Benefit of US Federal NOL carryback	0.00%	(31.40%)
Return to Provision Adjustments (in Dollars)	$ 14	$ (394)
Return to Provision Adjustments	0.70%	(34.50%)
Other items (in Dollars)	$ 8	$ 78
Other items	0.20%	6.80%
Income tax (benefit) expense (in Dollars)	$ 50	$ 444
Income tax (benefit) expense	2.60%	38.80%

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