Quarterly report pursuant to Section 13 or 15(d)

Equity (Details 2)

v3.19.2
Equity (Details 2)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Stock options granted to employee and director [Member]    
Dividend rate 0.00% 0.00%
Terms (in years) 5 years 5 years
Stock options granted to employee and director [Member] | Minimum [Member]    
Volatility 149.74% 175.94%
Risk-free interest rate 2.31% 2.25%
Stock options granted to employee and director [Member] | Maximum [Member]    
Volatility 150.61% 185.28%
Risk-free interest rate 2.49% 2.78%
Stock Options Granted to Non-employee [Member]    
Dividend rate 0.00% 0.00%
Stock Options Granted to Non-employee [Member] | Minimum [Member]    
Terms (in years) 3 years 2 years 6 months 3 days
Volatility 150.35% 172.87%
Risk-free interest rate 2.28% 2.29%
Stock Options Granted to Non-employee [Member] | Maximum [Member]    
Terms (in years) 5 years 3 years
Volatility 151.70% 188.29%
Risk-free interest rate 2.51% 2.66%