Post-effective amendment to a registration statement that is not immediately effective upon filing

SHARE-BASED COMPENSATION (Details) - Schedule of share-based payment award, stock options, valuation assumptions

v3.21.1
SHARE-BASED COMPENSATION (Details) - Schedule of share-based payment award, stock options, valuation assumptions
12 Months Ended
Dec. 31, 2020
Dec. 18, 2020
Dec. 31, 2019
SHARE-BASED COMPENSATION (Details) - Schedule of share-based payment award, stock options, valuation assumptions [Line Items]      
Risk-free interest rate 0.43% 0.45%  
Expected dividend yield 0.00%   0.00%
Expected volatility 60.00% 50.00% 80.00%
Minimum      
SHARE-BASED COMPENSATION (Details) - Schedule of share-based payment award, stock options, valuation assumptions [Line Items]      
Expected term 1 month 20 days   2 years 9 months 14 days
Risk-free interest rate 0.22%   1.30%
Expected volatility 85.00%    
Maximum      
SHARE-BASED COMPENSATION (Details) - Schedule of share-based payment award, stock options, valuation assumptions [Line Items]      
Expected term 5 years   5 years
Risk-free interest rate 0.41%   2.70%
Expected volatility 90.00%