Quarterly report pursuant to Section 13 or 15(d)

Warrant Liabilities (Details 2)

v3.21.1
Warrant Liabilities (Details 2) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Expected life (years)   3 years 10 months 24 days 3 years 8 months 12 days   3 years 8 months 12 days 3 years 8 months 12 days
Expected volatility   63.20% 58.60%     57.00%
Expected dividend rate   0.00% 0.00% 0.00% 0.00% 0.00%
Feb-2021 Warrant [Member]            
Expected forfeiture rate 0.00%          
Expected life (years) 2 years 9 months 18 days          
Expected volatility 73.40%          
Risk free rate 0.40%          
Expected dividend rate 0.00%          
Exercise price $ 1.35          
Market price $ 1.10          
Sep-2018 Warrants [Member]            
Expected forfeiture rate 0.00%          
Expected life (years) 6 months          
Expected volatility 93.70%          
Risk free rate 0.20%          
Expected dividend rate 0.00%          
Exercise price $ 1.00          
Market price $ 1.10          
Aug-2020 Warrants [Member]            
Expected forfeiture rate 0.00%          
Expected life (years) 1 year 3 months 18 days          
Expected volatility 83.70%          
Risk free rate 0.20%          
Expected dividend rate 0.00%          
Exercise price $ 0.75          
Market price $ 1.10