Fair Value Accounting (Tables)

12 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following table lists our financial assets and liabilities that are measured at fair value on a recurring basis:

Fair Value Measurement
(in thousands)	Level 1		Level 2	Level 3
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Remaining Inputs	Significant Unobservable Inputs	Total
As of September 30, 2013
Assets:
Cash and cash equivalents	$	16,104	—	—	$	16,104
Restricted cash	815		—	—	815
Liabilities:
Warrant liability	—		155	—	155
As of September 30, 2012
Assets:
Cash and cash equivalents	$	9,047	—	—	$	9,047
Restricted cash	82		—	—	82
Liabilities:
Warrant liability	—		670	—	670

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques

The change in the fair value of our warrants has been primarily due to the change in the closing price of our common stock.

Assumptions used in Monte Carlo Option Valuation Model	Warrants issued on February 20, 2008		Warrants issued on October 1, 2009
	As of September 30, 2013	As of September 30, 2012	As of September 30, 2013	As of September 30, 2012
Number of warrants issued	—	350,010	400,001	400,001
Expiration date	—	2/20/2013	4/1/2015	4/1/2015
Exercise price	$—	$60.24	$6.76 - $9.44	$6.76 - $9.44
Expected dividend yield	—	—	—	—
Expected stock price volatility	—%	54.82%	51.52%	81.56%
Risk-free interest rate	—%	0.14%	0.22%	0.27%
Expected term (in years)	0	0.39	1.50	2.50
Total warrant valuation	$—	$—	$155,000	$670,000