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Income Taxes (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Income Taxes [Line Items]      
Computed expected tax expense $ 4,812 $ 5,750 $ 5,037
State income taxes, net of federal benefit 221 242 146
Stock-based compensation and other permanent differences 131 (76) 231
Total income tax expense $ 5,164 $ 5,916 $ 5,414