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Income Taxes (Income Tax Provision) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Current:      
Federal $ 526 $ 312 $ (141)
State 57 165 139
Foreign 1,412 1,756 2,099
Deferred:      
U.S. (668) (1,454) 1,260
Foreign 160 (654) (145)
Income tax provision $ 1,487 $ 125 $ 3,212