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Reconciliation of Actual Income Tax Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
Income Tax Disclosure [Abstract] |  |
Expense (benefit) for U.S federal income tax at statutory rate | $ (4,763) | $ (2,834)
Effect of foreign income taxes | 3 | 1
Research and experimentation tax credit | 6 | (223)
State income taxes, net of federal income tax benefit | (265) | 153
Nondeductible expenses | 927 | 44
Change in valuation allowance | 3,768 | 2,893
Impact on deferred taxes due to change in tax rate |  | 563
Change in fair value of contingent consideration | (278) | (569)
Foreign income tax withholding | 114 | 419
Disallowance of stock compensation adjustments in excess of book | 217 | 334
Other items | 444 | (203)
Income tax expense | $ 173 | $ 578
Effective tax rate | (0.80%) | (4.30%)

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