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STOCK OPTIONS (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Number of options, outstanding |  |
Outstanding, beginning of period (in shares) | 2,864,189 | 2,467,046
Granted (in shares) | 830,922 | 592,000
Exercised (in shares) | (97,500) | (107,000)
Cancelled and Forfeited (In shares) | (466,164) | (87,857)
Outstanding, end of period (in shares) | 3,131,447 | 2,864,189
Exercisable, end of period (in shares) | 1,424,036 |
Weighted average exercise price |  |
Outstanding, beginning of period (in dollars per share) | $ 3.69 | $ 3.55
Granted (in dollars per share) | 2.21 | 3.88
Exercised (in dollars per share) | 2.25 | 2.17
Cancelled (in dollars per share) | 3.57 | 2.80
Outstanding, end of period (in dollars per share) | 3.38 | $ 3.69
Exercisable, end of period (in dollars per share) | $ 4.28 |

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