Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details 1)

v3.20.4
STOCK-BASED COMPENSATION (Details 1)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Risk-free interest rate - Minimum 0.36% 2.30%
Risk-free interest rate - Maximum 1.25% 2.54%
Expected stock price volatility - min 120.62% 107.12%
Expected stock price volatility - max 129.29% 109.72%
Expected dividend yield 0.00% 0.00%
Minimum [Member]    
Expected term of option 5 years 6 months 5 years 1 month 6 days
Maximum [Member]    
Expected term of option 6 years 10 years