Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2010	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2010
Numerator:
Basic and diluted - net loss	$ (1,250,248)	$ (7,006,283)	$ (1,367,216)	$ (2,856,106)	$ (10,512,295)	$ (14,715,006)	$ (28,249,635)	$ (6,399,963)
Denominator:
Basic and diluted weighted average shares outstanding (in shares)	61,319,313	58,481,355		60,939,383	58,481,355