Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Current:
Federal	$ 6,516	$ 7,797	$ 7,244
State	973	1,084	973
Foreign	210	213	300
Total current	7,699	9,094	8,517
Deferred:
Federal	220	69	1,079
State	48	24	169
Total deferred	268	93	1,248
Provision for income taxes	7,967	9,187	9,765
Reconciliation of income taxes
Federal tax at statutory rate	8,133	8,777	9,371
State taxes, net of federal benefit	664	721	743
Non-deductible expenses	192	195	154
Manufacturing benefit	(613)	(586)	(595)
Change in valuation allowance	(334)	163	247
Other	(75)	(83)	(155)
Provision for income taxes	7,967	9,187	$ 9,765
Current Deferred Income Tax Assets and Liabilities
Accounts receivable reserves	370	357
Inventory valuation adjustments	816	739
Accrued liabilities	(19)	126
Current deferred income tax assets	1,167	1,222
Non-Current Deferred Income Tax Assets
Goodwill and other intangible assets	3,376	3,692
Property, plant and equipment	1,372	1,095
Foreign net operating loss carryforwards	1,881	1,647
Foreign tax credit carryforwards	184	441
Deferred Tax Assets, Gross, Total	6,813	6,875
Less: valuation allowance	(1,881)	(1,981)
Deferred Income Tax Assets and Liabilities, net	4,932	4,894
Unrecognized tax benefits
Unrecognized tax benefits	0	0
Foreign
Operating Loss Carryforwards
Net operating loss carryforwards	8,038	7,155
Loss carryforwards expire between 2016 and 2025	3,031
Loss carryforwards no expiration	5,007
Valuation allowances	$ 1,881	1,647
Valuation allowance tax credit carryforwards		$ 334