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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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