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STOCK-BASED COMPENSATION (Details 2)
6 Months Ended
Jun. 30, 2019
$ / shares
shares
Outstanding Options  
Number Outstanding at end | shares 5,458,000
Weighted Averaged Remaining Life 5 years 8 months 1 day
Weighted Averaged Exercise Price | $ / shares $ 3.41
Vested Options  
Number Exercisable at end | shares 2,590,000
Weighted Averaged Exercise Price | $ / shares $ 2.39
Weighted Averaged Remaining Life 3 years 4 months 6 days
$0.20 - $0.53 [Member]  
Outstanding Options  
Number Outstanding at end | shares 399,000
Weighted Averaged Remaining Life 3 years 6 months 29 days
Weighted Averaged Exercise Price | $ / shares $ 0.27
Vested Options  
Number Exercisable at end | shares 399,000
Weighted Averaged Exercise Price | $ / shares $ 0.27
Weighted Averaged Remaining Life 3 years 6 months 29 days
$0.65 - $1.80 [Member]  
Outstanding Options  
Number Outstanding at end | shares 692,000
Weighted Averaged Remaining Life 11 months 8 days
Weighted Averaged Exercise Price | $ / shares $ 0.85
Vested Options  
Number Exercisable at end | shares 692,000
Weighted Averaged Exercise Price | $ / shares $ 0.85
Weighted Averaged Remaining Life 11 months 8 days
$1.83 - $2.84 [Member]  
Outstanding Options  
Number Outstanding at end | shares 586,000
Weighted Averaged Remaining Life 2 years 11 months 26 days
Weighted Averaged Exercise Price | $ / shares $ 2.07
Vested Options  
Number Exercisable at end | shares 551,000
Weighted Averaged Exercise Price | $ / shares $ 2.07
Weighted Averaged Remaining Life 3 years 14 days
$3.20 - $6.20 [Member]  
Outstanding Options  
Number Outstanding at end | shares 3,773,000
Weighted Averaged Remaining Life 7 years 2 months 8 days
Weighted Averaged Exercise Price | $ / shares $ 4.39
Vested Options  
Number Exercisable at end | shares 940,000
Weighted Averaged Exercise Price | $ / shares $ 4.55
Weighted Averaged Remaining Life 5 years 2 months 23 days
$7.20 - $22.00 [Member]  
Outstanding Options  
Number Outstanding at end | shares 8,000
Weighted Averaged Remaining Life 1 month 17 days
Weighted Averaged Exercise Price | $ / shares $ 10.36
Vested Options  
Number Exercisable at end | shares 8,000
Weighted Averaged Exercise Price | $ / shares $ 10.36
Weighted Averaged Remaining Life 1 month 17 days