Derivative Financial Instruments (Details 2) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Nov. 14, 2011 November 14, 2011 securities purchase agreements	Jun. 30, 2013 November 14, 2011 securities purchase agreements	Dec. 01, 2011 November 14, 2011 securities purchase agreements Selling agent
Derivative Financial Instruments
Number of units sold			1,328,941
Number of units issued for services (in units)					77,750
Number of shares of common stock per unit			1
Number of warrants per unit			1
Number of common shares that can be acquired upon exercise of each warrant			1
Fair value of derivative liabilities reclassified to equity	$ 3,575,000	$ 169,000		$ 3,600,000
Derivative liability marked to market				$ 870,000