Commitments and Contingencies - Narrative (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Loss Contingencies [Line Items]
Deferred rent	$ 20,000		$ 33,000
Rental expense	956,000	$ 996,000
Sublease income	36,000	35,000
Pending And Threatend Litigation | Professional Fees
Loss Contingencies [Line Items]
Legal fees	573,000	$ 489,000
Letter of Credit
Loss Contingencies [Line Items]
Maximum borrowing capacity	218,000
Accounts payable and other liabilities
Loss Contingencies [Line Items]
Deferred rent	20,000		33,000
Accounts payable and other liabilities | Pending And Threatend Litigation
Loss Contingencies [Line Items]
Accrued legal fees and potential settlements	$ 740,000		$ 817,000