Stockholders' Equity - Additional Information (Detail)			12 Months Ended
	Sep. 30, 2012	Mar. 30, 2012	Dec. 31, 2008 2007 Long Term Incentive Plan	Sep. 30, 2012 2007 Long Term Incentive Plan	Aug. 03, 2007 2007 Long Term Incentive Plan	Sep. 30, 2012 Expiration 2015	Sep. 30, 2012 Expiration 2017
Stockholders Equity [Line Items]
Common stock reserved			4,600,000		3,500,000
Options award term			10 years
Shares approved for issuance				8,200,000
Shares available to be issued				1,600,000
Warrants issued to purchase shares of common stock	46,584	46,584				2,572,775	100,778
Warrant exercise price	1.61	1.61				2.50	3.97
Warrant expiration date	Mar. 30, 2022	Mar. 30, 2022				Jan. 28, 2015	Mar. 30, 2017