Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Statutory income tax amount	$ 2,939	$ 271	$ 2,801
State taxes, net of federal benefits	(222)	(281)	(32)
Utilization of tax credits	(250)	(76)	(601)
Manufacturing deduction	(285)	(92)	(65)
Discrete tax benefits	(845)	(1,470)	(863)
Foreign operations	181	316	166
Valuation reserve	297	11	65
Adjustment of tax contingency reserves	71	168	800
Meals and entertainment	93	99	80
Employee stock purchase plan	76	85	77
Other, net	2	15	5
Income tax provision (benefit)	$ 2,057	$ (954)	$ 2,433