Debt (Details 8) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Debt discount $ 0 $ 2,567,333 $ 2,567,333 $ 5,804,552
Additional debt discount     3,554,673  
Amortization of debt discount 0 3,083,437 6,122,006 3,237,219
Debt discount     $ 0 $ 2,567,333