Stock Offering (Details Textual) (USD $)	1 Months Ended		3 Months Ended	9 Months Ended
	Apr. 30, 2011	Feb. 28, 2011	Mar. 31, 2012	Sep. 30, 2012
Stock Offering (Textual) [Abstract]
Sale of common stock shares	$ 125,000,000
stock offering common stock warrants		30,000,000
Commission on sale of common stock				2.00%
Number of shares sold under sales agreement			572,510
Net proceeds on sale of common stock			$ 10,300,000