Warrant Liability (Details Textual) (USD $)	1 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
Warrant Liability (Details Textual) (USD $)	May 02, 2012	Nov. 30, 2009	Nov. 30, 2008	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Series A Warrants [Member]	Sep. 30, 2012 Series A Warrants [Member]	Jun. 30, 2012 Series A Warrants [Member]	Sep. 30, 2012 Series A Warrants [Member]	Dec. 31, 2011 Series A Warrants [Member]	May 02, 2012 Series B Warrant [Member]	Nov. 30, 2009 Series B Warrant [Member]	Nov. 30, 2008 Series B Warrant [Member]	Jun. 30, 2012 Series B Warrant [Member]	Sep. 30, 2012 Series B Warrant [Member]	Dec. 31, 2011 Series B Warrant [Member]
Warrant Liability (Textual) [Abstract]
Gross proceeds	$ 5,300,000			$ 3,375,000	$ 4,153,584		$ 1,045,660	$ 977,900				$ 5,300,000	$ 12,500,000	$ 20,000,000		$ 3,375,000	$ 10,000,000
Number of shares of common stock								1,445,400	2,700,000	1,445,400			0.40	0.75		2,700,000
Exercise price		15.00	23.00		1.40
Warrants issued													400,000	1,034,483
Warrants sold at public offering price																	1.25
Exercise price of warrant																1.40	1.25
Exercise price of common stock											$ 1.40
Number of warrants exercised					688,171			1,445,400		1,445,400					2,700,000	2,700,000
Number of units raised through public offering																	8,000,000
Warrants issued										2,700,000						2,700,000
Warrant Liability (Additional Textual) [Abstract]
Units sold to institutional investors		1,000,000	1,379,310
Price per unit sold to institutional investors		$ 12.50	$ 14.50
Total proceeds, net of offering expenses and placement agency fees		$ 11,985,000	$ 18,637,000
Date of issuance warrant						90th trading day