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STOCKHOLDERS' EQUITY (Details 1) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, Grants   732,869  
Number of Options, Exercised 15,000    
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Options, Outstanding at Beginning of Year 3,569,000    
Number of Options, Grants 0    
Number of Options, Exercised 15,000    
Number of Option, Forfeited/cancelled/expired/settled 5,000    
Number of Options, Balance at End of Year 3,549,000   3,569,000
Number of Options, Vested and expected to vest 3,518,000    
Number of Options, Unvested 187,000    
Number of Options, Exercisable 3,362,000    
Weighted-Average Exercise Price, Outstanding at Beginning of Year (in dollars per share) $ 2.12    
Weighted-Average Exercise Price, Grants (in dollars per share) 0    
Weighted-Average Exercise Price, Exercised (in dollars per share) 1.90    
Weighted-Average Exercise Price, Forfeited/cancelled/expired/settled (in dollars per share) 1.90    
Weighted-Average Exercise Price, Balance at End of Year (in dollars per share) 2.12   $ 2.12
Weighted-Average Exercise Price, Vested and expected to vest (in dollars per share) 2.12    
Weighted-Average Exercise Price, Unvested (in dollars per share) 1.90    
Weighted-Average Exercise Price, Exercisable (in dollars per share) $ 2.13    
Weighted-Average Remaining Contractual Term, Outstanding (in years) 6 years 11 months 8 days   7 years 2 months 8 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest (in years) 6 years 11 months 1 day    
Weighted-Average Remaining Contractual Term, Unvested (in years) 8 years 5 months 1 day    
Weighted-Average Remaining Contractual Term, Exercisable (in years)     6 years 10 months 6 days
Aggregate Intrinsic Value, Outstanding $ 462,000   $ 130,000
Aggregate Intrinsic Value, Vested and expected to vest 458,000    
Aggregate Intrinsic Value, Unvested 19,000    
Aggregate Intrinsic Value, Exercisable $ 443,000