Net Loss per Share

12 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Net Loss per Share

5.    Net Loss per Share

Net loss per share information is determined using the two-class method, which includes the weighted-average number of common shares outstanding during the period and other securities that participate in dividends (“participating securities”). The Company considers the outstanding warrants participating securities because they include rights to participate in dividends with the common stock on a one for one basis. In applying the two-class method, earnings are allocated to both common stock shares and warrants based on their respective weighted-average shares outstanding for the period. Since losses are not allocated to the participating securities, the two-class method results in the same loss per common share calculated using the basic method for the periods presented in these financial statements.

Basic and diluted net loss per share has been calculated by dividing net loss by the weighted average number of common shares outstanding during the period. All potentially dilutive common shares have been excluded from the calculation of weighted average common shares outstanding since their inclusion would be anti-dilutive.

The amount of options and warrants excluded are as follows:

	Year Ended September 30,
	2009		2010		2011
Common shared issuable upon conversion of Series A Preferred Stock		—		—		1,813,944
Common shares underlying warrants for Series A Preferred Stock		118,815		118,815		1,297,878
Common shares underlying warrants issued for common stock		—		2,398,200		10,204,709
Stock options		3,407,633		4,635,532		5,461,295
Restricted stock units		—		249,020		486,723