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Income Taxes (Detail) - Components of income before income tax and income tax expense (benefit) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Income before income tax:    
U.S. $ 3,383 $ 3,418
Foreign 410 182
Income before income taxes 3,793 3,600
Current:    
Federal 1,067 303
State 119 118
Foreign 132 159
Current Income Tax Expense (Benefit) 1,318 580
Deferred:    
Federal (86) 400
State 37 46
Foreign 18 (30)
Deferred Income Tax Expense (Benefit) (31) 416
Income tax expense (benefit) $ 1,287 $ 996