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STOCK-BASED COMPENSATION (Details) - 2015 Stock Option Plan [Member] - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dividend yield 0.00%
Expected Volatility 70.90%
Weighted-average volatility
Expected dividends
Expected term (in years)   5 years
Risk-free rate 2.48%