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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Income Tax Disclosure [Abstract]      
Statutory income tax amount $ 5,548 $ 4,491 $ 1,721
State taxes, net of federal benefits 204 (190) (251)
Utilization of tax credits (1,116) (250) (76)
Manufacturing deduction (450) (285) (92)
Discrete tax benefits (1,461) (818) (1,475)
Foreign operations 276 181 316
Valuation reserve (43) 297 11
Adjustment of tax contingency reserves 202 71 168
Meals and entertainment 55 64 93
Employee stock purchase plan 83 76 85
Contingent consideration (154) 0 0
Other, net 68 47 68
Income tax provision $ 3,212 $ 3,684 $ 568