Fair Value Accounting (Tables)

12 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring

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, 2015
Assets:
Cash and cash equivalents	$	111,885	—	—	$	111,885
Restricted cash	375		—	—	375
As of September 30, 2014
Assets:
Cash and cash equivalents	$	20,687	—	—	$	20,687
Restricted cash	1,482		—	—	1,482
Liabilities:
Warrant liability	—		122	—	122

Valuation Techniques

Assumptions used in Monte Carlo Option Valuation Model	Warrants issued on October 1, 2009
	As of September 30, 2015	As of September 30, 2014
Number of warrants issued	—	400,001
Expiration date	—	4/1/2015
Exercise price	—	$6.76 - $9.44
Expected dividend yield	—	—
Expected stock price volatility	—	51.71	%
Risk-free interest rate	—	0.30	%
Expected term (in years)	—	0.5
Total warrant valuation	—	$121,667