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Income Taxes (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Income Tax Disclosure [Abstract] |  |  |
Income tax benefit at statutory federal rate | $ (9,975) | $ (10,000) | $ (7,934)
Foreign income taxed at other rates |  | (170) | (353)
Permanent differences relating to stock based compensation | (601) | (714) | (4,379)
Permanent differences relating to GILTI inclusion | 165 |  |
Permanent differences relating to Section 162(m) |  |  | 816
Other permanent differences | 273 |  | 741
Adjustment to tax assets based on Section 382 |  |  | 3,330
Research and development credits, net | (37) | 232 | 1,042
State and local taxes | (4,122) | (4,975) | (7,022)
Adjustment to true up to prior years' tax provision | 206 | 24 | 48
Effect of change in statutory tax rates |  |  | 216
State minimum and excise taxes |  | 358 | 268
Change in valuation allowances | 14,098 | 15,603 | 13,495
Income tax expense | $ 7 | $ 358 | $ 268

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