Income Tax Expense (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Expense [Line Items]
Accumulated unremitted earnings of foreign subsidiaries	$ 32,600,000
Accumulated unremitted earnings of foreign subsidiaries in cash	27,000,000
Income taxes due if foreign entities' earnings were distributed	4,700,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	500,000
Reduction in the amount of unrecognized tax benefits in the next twelve months	100,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0	100,000	100,000
Capital loss carryforward, valuation allowance	400,000	400,000
Operating Loss Carryforwards, Valuation Allowance	300,000	400,000
Net operating loss carryforward — foreign	4,702,000	3,955,000
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	16,400,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	1,800,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	300,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	1,300,000
State Research And Other Credit CarryForwards With Expiration Date	900,000
State Research And Other Credit Carry Forwards Without Expiration Date	400,000
Deferred Tax Assets, Valuation Allowance (Less)	(4,297,000)	(3,780,000)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	500,000	2,800,000
Foreign Valuation Allowance [Member]
Income Tax Expense [Line Items]
Operating Loss Carryforwards, Valuation Allowance	3,600,000	2,800,000
Brazil, Germany, India, Japan and the United Kingdom [Member]
Income Tax Expense [Line Items]
Net operating loss carryforward — foreign	$ 18,200,000