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STOCK-BASED COMPENSATION (Details)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Forfeiture Rate 0.00% 0.00%
Maximum [Member]    
Expected volatility 121.00% 103.00%
Expected term 5 years 5 years 14 days
Risk-free interest rate 2.72% 2.57%
Minimum [Member]    
Expected volatility 71.00% 103.00%
Expected term 4 years 7 days 4 years 9 months 7 days
Risk-free interest rate 2.18% 2.56%