Accrued Expenses and Other Current Liabilities (Severance and Restructuring Accruals) (Narrative) (Details) - USD ($)			3 Months Ended	12 Months Ended
	Dec. 10, 2014	Sep. 17, 2014	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Severance and restructuring accruals:
Loss on contract termination				$ 700,000
Chief Operating Officer
Severance and restructuring accruals:
Estimated charge related to separation agreement					$ 500,000
Chief Executive Officer
Severance and restructuring accruals:
Estimated charge related to separation agreement			$ 800,000
Resignation period following replacement selection		15 days
Continuation of base salary period		602 days
Continuation of benefits, period		18 months
Outplacement services, period		1 year
Outplacement services, value		$ 15,000
Chief Administrative Officer
Severance and restructuring accruals:
Estimated charge related to separation agreement				600,000
Continuation of base salary period	518 days
Continuation of benefits, period	18 months
Outplacement services, period	1 year
Outplacement services, value	$ 15,000
Chief Counsel and Secretary
Severance and restructuring accruals:
Estimated charge related to separation agreement				$ 500,000
Continuation of base salary period	476 days
Continuation of benefits, period	18 months
Outplacement services, period	1 year
Outplacement services, value	$ 15,000