Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Current:
Federal	$ 7,797	$ 7,244	$ 6,296
State	1,084	973	893
Foreign	213	300
Total current	9,094	8,517	7,189
Deferred:
Federal	69	1,079	1,034
State	24	169	185
Total deferred	93	1,248	1,219
Provision for income taxes	9,187	9,765	8,408
Reconciliation of income taxes
Federal tax at statutory rate	8,777	9,371	8,454
State taxes, net of federal benefit	721	743	701
Non-deductible expenses	195	154	119
Manufacturing benefit	(586)	(595)	(560)
Change in valuation allowance	163	247
Other	(83)	(155)	(306)
Provision for income taxes	9,187	9,765	8,408
Current Deferred Income Tax Assets
Accounts receivable reserves	357	499
Inventory valuation adjustments	739	646
Accrued liabilities	126	249
Current deferred income tax assets	1,222	1,394
Non-Current Deferred Income Tax Assets and Liabilities, net
Goodwill and other intangible assets	3,692	4,674
Property, plant and equipment	1,095	160
Other non-current liabilities	441	247
Deferred Tax Assets, Gross, Total	5,228	5,081
Less: valuation allowance	(334)	(247)
Deferred Income Tax Assets and Liabilities, net	4,894	4,834
Unrecognized tax benefits
Unrecognized tax benefits	$ 0	$ 0