Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details - Options by exercise price (Details - Assumptions)

v3.21.2
Stockholders' Equity (Details - Options by exercise price (Details - Assumptions) - Equity Option [Member]
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 0.93% 1.71%
Expected life 10 years 10 years
Expected volatility 122.93% 158.86%
Expected dividend yield 0.00% 0.00%