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Income Taxes (Details 1) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Net operating loss carryforwards | $ 46,462 | $ 46,208 | $ 34,982
Research and development tax credit carryforwards | 2,713 | 2,182 | 1,577
Stock-based compensation | 18,593 | 13,373 | 10,453
Research and development capitalization | 7,219 |  |
Unpaid charges | 1,559 | 894 | 89
Intangible asset costs | 593 | 388 | 323
Foreign exchange and other | 49 | 44 | 62
Valuation allowance of deferred tax assets | (77,188) | (63,089) | (47,486)
Net deferred tax assets |  |  |

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