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Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Computed expected income tax expense (benefit) |  | $ (1,429) | $ 5,080 | $ 4,371
State income taxes, net of federal benefit |  | 253 | 672 | 804
Deferred taxes on subsidiaries acquired/sold |  |  |  | 709
Permanent differences |  | 395 | 45 | 85
Change in deferred tax liability rate |  |  |  | (8,832)
Change in valuation allowance |  | 1,273 |  |
Tax credits |  | (945) | (900) | (808)
Other |  | (40) | (1,153) | 553
Total income tax expense (benefit) | $ 692 | $ (493) | $ 3,744 | $ (3,118)

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