Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Details)

v3.21.2
STOCK-BASED COMPENSATION (Details) - 2015 Stock Option Plan [Member] - Time Based Shares Options [Member] - USD ($)
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Dividend yield 0.00% 0.00%
Expected Volatility   62.10%
Weighted-average volatility 0.00% 0.00%
Expected dividends $ 0 $ 0
Expected term (in years) 10 years 10 years
Risk-free rate   0.63%
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected Volatility 74.01%  
Risk-free rate 1.20%  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected Volatility 74.28%  
Risk-free rate 1.62%