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WARRANT LIABILITY (Details 3) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Weighted average assumptions:    
Risk-free interest rate 0.44% 0.20%
Expected dividend yield 0.00% 0.00%
Expected option life (years) 2 years 2 months 26 days 2 years 8 months 23 days
Expected stock price volatility 85.01% 73.93%
Weighted average fair value $ 0.67 $ 0.77