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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Income Taxes |  |  |  |
Income tax (benefit) expense | $ (1,692) | $ 11 | $ (1,488) | $ 28
Estimated annualized effective income tax rate |  |  | 21.99% |
Effective Income Tax Rate, Continuing Operations | (205.80%) |  | (64.50%) |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Release Of Allowances Amount |  |  | $ 1,800 |
State credits that are expected to expire unutilized | $ 731 |  | 731 |
Federal |  |  |  |
Income Taxes |  |  |  |
Research and development credits | 117 |  | 117 |
State |  |  |  |
Income Taxes |  |  |  |
Research and development credits | $ 118 |  | $ 118 |

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