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Income Taxes - Schedule of Components of Deferred Taxes (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 125,306 | $ 131,897
Deferred credits | 1,057 | 703
Other accrued expenses | 1,234 | 1,769
Prepaids and other | 556 | 1,175
Warrant liabilities | 5,748 | 5,725
State alternative minimum tax |  | 1
Other reserves and estimated losses | 937 | 873
Operating lease liabilities | 2,991 | 8,012
Deferred revenue | 4,829 | 5,506
Interest expense carryforward | 6,457 |
Gross deferred tax assets | 149,115 | 155,661
Less: valuation allowance | (21,102) | (2,901)
Total net deferred tax assets | 128,013 | 152,760
Intangible assets |  | (877)
Operating lease right-of-use assets | (2,475) | (2,055)
Property and equipment | (131,805) | (166,586)
Unrealized gain on equity investments | (2,148) | (961)
Total deferred tax liabilities | (136,427) | (170,479)
Net deferred tax liabilities | $ (8,414) | $ (17,719)

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