Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Operating Loss Carryforwards [Line Items]
Federal statutory rate	35.00%
Income tax benefit from release of valuation allowance for certain deferred tax assets	$ (1,334,000)	$ 1,384,000	$ (28,136,000)
Valuation allowance	24,928,000	24,887,000
Common shares reserved under stock option plans
Operating Loss Carryforwards [Line Items]
Valuation allowance	13,600,000
Expectations of Future Taxable Income
Operating Loss Carryforwards [Line Items]
Income tax benefit from release of valuation allowance for certain deferred tax assets	41,000	2,700,000	40,500,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	36,500,000
Research and development tax credit carryforwards	1,600,000
Minimum tax credit carryforwards	600,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	78,400,000
Research and development tax credit carryforwards	2,600,000
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	17,900,000
Research and development tax credit carryforwards	2,000,000
Foreign tax credit carryforwards	900,000
Tax benefit from tax holiday			$ 57,000