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STOCK-BASED COMPENSATION (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Risk-free interest rate   2.00%
Expected volatility 75.00% 75.00%
Expected dividend yield 0.00% 0.00%
Minimum [Member]    
Risk-free interest rate 1.89%  
Expected life (years) 5 years 6 months 6 years 3 months
Maximum [Member]    
Risk-free interest rate 2.40%  
Expected life (years) 10 years 10 years