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STOCK-BASED COMPENSATION (Details 2)
3 Months Ended
Mar. 31, 2019
$ / shares
shares
Outstanding Options  
Number Outstanding at end | shares 5,505,000
Weighted Averaged Remaining Life 6 years 18 days
Weighted Averaged Exercise Price | $ / shares $ 3.33
Vested Options  
Number Exercisable at end | shares 2,951,000
Weighted Averaged Exercise Price | $ / shares $ 2.45
Weighted Averaged Remaining Life 4 years 1 month 9 days
$0.20 - $0.53 [Member]  
Outstanding Options  
Number Outstanding at end | shares 399,000
Weighted Averaged Remaining Life 3 years 9 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 9 months 29 days
$0.65 - $1.80 [Member]  
Outstanding Options  
Number Outstanding at end | shares 792,000
Weighted Averaged Remaining Life 1 year 4 days
Weighted Averaged Exercise Price | $ / shares $ 0.84
Vested Options  
Number Exercisable at end | shares 792,000
Weighted Averaged Exercise Price | $ / shares $ 0.84
Weighted Averaged Remaining Life 1 year 4 days
$1.83 - $2.84 [Member]  
Outstanding Options  
Number Outstanding at end | shares 626,000
Weighted Averaged Remaining Life 3 years 2 months 8 days
Weighted Averaged Exercise Price | $ / shares $ 2.06
Vested Options  
Number Exercisable at end | shares 612,000
Weighted Averaged Exercise Price | $ / shares $ 2.06
Weighted Averaged Remaining Life 3 years 2 months 5 days
$3.20 - $6.20 [Member]  
Outstanding Options  
Number Outstanding at end | shares 3,680,000
Weighted Averaged Remaining Life 7 years 10 months 14 days
Weighted Averaged Exercise Price | $ / shares $ 4.4
Vested Options  
Number Exercisable at end | shares 1,140,000
Weighted Averaged Exercise Price | $ / shares $ 4.48
Weighted Averaged Remaining Life 6 years 10 months 17 days
$7.20 - $22.00 [Member]  
Outstanding Options  
Number Outstanding at end | shares 8,000
Weighted Averaged Remaining Life 4 months 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 4 months 17 days