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STOCKHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2018
Equity [Abstract]  
Schedule of exercise price range of warrants

The warrants outstanding and exercisable at March 31, 2018 are as follows:

 

      Warrants outstanding     Warrants exercisable  
Exercise price     No. of
shares
    Weighted
average
remaining
years
    Weighted
average
exercise
price
    No. of
shares
   

Weighted
average
exercise 

price 

 
                                           
$0.625       6,219,200       2.51               6,219,200          
$0.20       2,308,513       2.25               2,308,513          
                                           
        8,527,713       2.44     $ 0.51       8,527,713     $ 0.51