Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Operating Loss Carryforwards [Line Items]
Federal statutory rate	35.00%
Income tax benefit from release of valuation allowance for certain deferred tax assets	$ (815,000)	$ (1,334,000)	$ 1,384,000
Valuation allowance	23,287,000	24,928,000
Common shares reserved under stock-based benefit plans
Operating Loss Carryforwards [Line Items]
Valuation allowance	13,300,000
Expectations of Future Taxable Income
Operating Loss Carryforwards [Line Items]
Income tax benefit from release of valuation allowance for certain deferred tax assets	(1,600,000)	41,000	2,700,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	14,500,000
Research and development tax credit carryforwards	3,000,000
Minimum tax credit carryforwards	600,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	73,200,000
Research and development tax credit carryforwards	2,700,000
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	20,900,000
Foreign tax credit carryforwards	$ 5,400,000