| Number
of shares |
Weighted average exercise price per share |
Weighted average remaining contractual term (in years) |
Aggregate intrinsic value |
|||||||||||||
| Outstanding at January 1, 2015 | 77,000 | $ | 0.669 | 4.40 | $ | 67,414 | ||||||||||
| Granted | 125,500 | – | – | 346,280 | ||||||||||||
| Exercised | – | – | – | – | ||||||||||||
| Cancelled | – | – | – | – | ||||||||||||
| Outstanding at December 31, 2015 | 202,500 | $ | 2.759 | 5.00 | 413,693 | |||||||||||
| Granted | 313,000 | – | – | 329,871 | ||||||||||||
| Exercised | – | – | – | – | ||||||||||||
| Cancelled | (31,250 | ) | – | – | – | |||||||||||
| Outstanding at December 31, 2016 | 484,250 | $ | 1.132 | 4.69 | $ | 743,564 | ||||||||||
| Granted | – | – | – | – | ||||||||||||
| Exercised | (2,900 | ) | – | – | – | |||||||||||
| Cancelled | (7,500 | ) | – | – | (2,400 | ) | ||||||||||
| Outstanding and exercisable at December 31, 2017 | 473,850 | $ | 1.132 | 3.85 | $ | 741,164 | ||||||||||