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SHARE-BASED COMPENSATION (Details 1) - $ / shares
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
STOCKHOLDERS' EQUITY    
Expected stock price volatility 50.00% 45.00%
Risk-free interest rate 0.92% 0.42%
Forfeiture rate 0.00% 0.00%
Expected dividend yield 0.00% 0.00%
Expected life of options - years 5 years 8 months 12 days 6 years 10 days
Weighted-average fair value of options granted $ 2.46 $ 1.86