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Income Taxes (Income Tax Provision) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Current:      
Federal $ 1,388 $ 709 $ 950
State 242 572 290
Foreign 1,678 1,128 746
Deferred:      
U.S. (3,627) (2,911) (825)
State (618) 0 0
Foreign (430) (446) 26
Income tax (benefit) expense $ (1,367) $ (948) $ 1,187