|
Debt (Details 7) (USD $)
|
Jun. 30, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|---|
| Debt issue costs | $ 335,433 | $ 851,923 | $ 305,283 |
| Accumulated amortization of debt issue costs | (335,433) | (516,490) | (237,095) |
| Debt issue costs - net | $ 0 | $ 335,433 | $ 68,188 |