Annual report pursuant to Section 13 and 15(d)

STOCKHOLDER'S EQUITY (Details 1)

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STOCKHOLDER'S EQUITY (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Number of options, outstanding    
Outstanding, beginning of period (in shares) 2,950,000 4,282,500
Granted (in shares) 105,000 280,000
Expired (in shares)
Exercised (in shares) (200,000) (1,612,500)
Outstanding, end of period (in shares) 2,855,000 2,950,000
Exercisable, end of period (in shares) $ 2,828,750 $ 2,637,503
Weighted average exercise price    
Outstanding, beginning of period (in dollars per share) $ 1.27 $ 0.91
Granted (in dollars per share) $ 2.34 $ 1.65
Expired (in dollars per shares)
Exercised (in dollars per share) $ 0.90 $ 0.39
Outstanding, end of period (in dollars per share) 1.33 1.27
Exercisable, end of period (in dollars per share) $ 1.32 $ 1.24