| Number of Shares | Weighted Average Exercise Price | |||||||
| Warrants outstanding at December 31, 2011 | 103,146 | $ | 0.11 | |||||
| Warrants exercised | (60,000 | ) | $ | 0.05 | ||||
| Warrants outstanding at December 31, 2012 | 43,146 | $ | 0.185 | |||||
| Warrants outstanding at December 31, 2013 | 43,146 | $ | 0.185 | |||||