A summary of stock option activity is as follows (Details)	Shares	Weighted Average Exercise Price	Weighted Average Remaining Contractual Terms	Aggregate Instrinsic Value
Options outstanding at Dec. 31, 2012	1,986,255	8.95	7.9
Options Granted	3,090,900	0.40	9.6
Options Exercised				0
Options Forfeited	(340,837)	6.41
Options Expired	(32,992)	51.05
Options exercisable	1,193,800	10.45	6.7
Options unvested	3,509,526	0.77	9.4	2,751,453
Options outstanding at Dec. 31, 2013	4,703,326	3.22	8.7