Annual report pursuant to Section 13 and 15(d)

4. Equity (Details - Assumptions)

v3.20.4
4. Equity (Details - Assumptions)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Fair value of common stock on measurement date $2.06 to $2.47 per share $2.00 to $4.00 per share
Risk free interest rate minimum [1] 33.00% 1.74%
Risk free interest rate maximum [1] 0.82% 2.00%
Volatility minimum [2] 122.79% 102.55%
Volatility maximum [2] 128.57% 106.71%
Dividend yield [3] 0.00% 0.00%
Expected term (in years)   10 years
Minimum [Member]    
Expected term (in years) 5 years 6 months  
Maximum [Member]    
Expected term (in years) 6 years 3 months 19 days  
[1] The risk-free interest rate was determined by management using the market yield on U.S. Treasury securities with comparable terms as of the measurement date.
[2] The trading volatility was determined by calculating the volatility of the Company's peer group.
[3] The Company does not expect to pay a dividend in the foreseeable future.