Annual report pursuant to Section 13 and 15(d)

Share Based Payments (Details 3)

v3.21.1
Share Based Payments (Details 3)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividends
Risk-free rate   1.64%
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 77.75% 87.80%
Expected term 2 years 2 years
Risk-free rate 1.64%  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 80.70% 92.70%
Expected term 5 years 5 years
Risk-free rate 1.75%