The following table summarizes information about common stock warrants outstanding at December 31, 2013:
| Outstanding | Exercisable | |||||||||||||||||||||
Exercise Price |
Number Outstanding |
Weighted Average Remaining Contractual Life (years) | Weighted Average Exercise Price |
Number Exercisable |
Weighted Average Exercise Price |
|||||||||||||||||
| $ | 3.30 | 11,364 | 2.36 | $ | 3.30 | 11,364 | $ | 3.30 | ||||||||||||||
| 1.25 | 13,950 | 1.75 | 1.25 | 13,950 | 1.25 | |||||||||||||||||
| 1.00 | 24,000 | 2.82 | 1.00 | 24,000 | 1.00 | |||||||||||||||||
| 0.75 | 4,811,021 | 4.48 | 0.75 | 4,811,021 | 0.75 | |||||||||||||||||
| 0.50 | 1,570,750 | 4.74 | 0.50 | 1,570,750 | 0.50 | |||||||||||||||||
| $ | .50 - $3.30 | 6,431,085 | 4.58 | 6,431,085 | ||||||||||||||||||