Warrants for Stock (Details1) (Warrant [Member], USD $)				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 12.50 - $17.50 [Member]	Dec. 31, 2011 12.50 - $17.50 [Member]	Dec. 31, 2012 0.25 - $2.50 [Member]	Dec. 31, 2011 0.25 - $2.50 [Member]
Outstanding Warrants
Number of Shares Underlying Warrants	2,624,286	603,145	336,745	125,245	125,245	2,499,041	477,900
Weighted Average Exercise Price	$ 1.15	$ 3.26	$ 5.40	$ 13.03	$ 13.03	$ 0.56	$ 0.69
Weighted Average Remaining Contractual Life (in years)				8 years 7 months 6 days	9 years 7 months 6 days	4 years 2 months 12 days	3 years 9 months 18 days
Exercisable Warrants
Number of Shares Underlying Warrants	2,624,286	603,145		125,245	125,245	2,499,041	477,900
Weighted Average Exercise Price				$ 13.03	$ 13.03	$ 0.56	$ 0.69