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Income Taxes - Reconciliation of Income tax expense (benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Taxes
Computed "expected" tax expense (benefit) (in Dollars)	$ 240	$ (225)
Computed "expected" tax expense (benefit)	21.00%	21.20%
Increases (reductions) in taxes resulting from:
State income taxes, net of federal tax benefit (in Dollars)	$ (38)	$ (7)
State income taxes, net of federal tax benefit	(3.30%)	0.70%
Foreign rate differential (in Dollars)	$ 13	$ 2
Foreign rate differential	1.10%	(0.20%)
Exclusion of PPP Loan Forgiveness Income (in Dollars)	$ (458)
Exclusion of PPP Loan Forgiveness Income	(40.10%)
Exclusion of the UK's Gain on Sale of Disc Ops Entity (in Dollars	$ (98)
Exclusion of the UK's Gain on Sale of Disc Ops Entity	(8.60%)
Permanent differences (in Dollars)	$ (22)	$ (3)
Permanent differences	(1.90%)	0.30%
Change in valuation allowance (in Dollars)	$ 1,598	$ 1,005
Change in valuation allowance	139.80%	(94.70%)
Research and development credit (in Dollars)	$ (116)	$ (107)
Research & development credit	(10.10%)	10.10%
Benefit of US Federal NOL carryback (in Dollars)	$ (359)	$ (222)
Benefit of US Federal NOL carryback	(31.40%)	20.90%
Return to Provision Adjustments (in Dollars)	$ (394)
Return to Provision Adjustments	(34.50%)
Other items (in Dollars)	$ 78	$ (59)
Other items	6.80%	5.50%
Income tax (benefit) expense (in Dollars)	$ 444	$ 384
Income tax (benefit) expense	38.80%	(36.20%)

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