Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details)

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STOCK-BASED COMPENSATION (Details) - 2015 Stock Option Plan [Member] - Time Based Shares Options [Member]
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dividend yield 0.00% 0.00%
Expected term (in years) 10 years  
Maximum [Member]    
Expected Volatility 60.30% 65.20%
Expected term (in years)   10 years
Risk-free rate 2.72% 3.15%
Minimum [Member]    
Expected Volatility 56.10% 61.10%
Expected term (in years)   5 years
Risk-free rate 1.60% 2.80%