|
Summary of Significant Accounting Policies (Details 5) (USD $)
|
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Advertising | $ 3,275,200 | $ 2,044,005 | $ 5,592,577 | $ 3,976,840 | $ 8,430,401 | $ 5,241,585 |