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Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Income Tax Disclosure [Abstract]      
Federal statutory income tax expense (benefit) $ 7,169 $ (1,429) $ 5,080
State income taxes, net of federal benefit 716 253 672
Permanent differences (434) 395 45
Change in state tax rate (804)
Change in valuation allowance (632) 1,273
Tax credits (1,207) (945) (900)
Other (819) (40) (1,153)
Total income tax expense (benefit) $ 3,989 $ (493) $ 3,744