The following table summarizes information about common stock warrants outstanding at December 31, 2013:
| Outstanding | Exercisable | |||||||||||||||||||
| Weighted | ||||||||||||||||||||
| Average | Weighted | Weighted | ||||||||||||||||||
| Remaining | Average | Average | ||||||||||||||||||
| Exercise | Number | Contractual | Exercise | Number | Exercise | |||||||||||||||
| Price | Outstanding | Life (Years) | Price | Exercisable | Price | |||||||||||||||
| $1.00 | 1,710,000 | 3.48 | $ | 1.00 | 1,710,000 | $ | 1.00 | |||||||||||||
| $2.00 | 1,812,500 | 4.55 | $ | 2.00 | 1,412,500 | $ | 2.00 | |||||||||||||
| $2.60 | 20,000 | 4.35 | $ | 2.60 | 15,000 | $ | 2.60 | |||||||||||||
| $3.38 | 713,965 | 3.03 | $ | 3.38 | 713,965 | $ | 3.38 | |||||||||||||
| $1.00 - 3.38 | 4,256,465 | 3.87 | $ | 1.83 | 3,851,465 | $ | 1.82 | |||||||||||||