Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)

v3.21.1
Stockholders' Equity - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dividend yield 0.00% 0.00%
Risk-free interest rate, minimum 0.19% 0.19%
Risk-free interest rate, maximum 0.22% 0.50%
Expected volatility, minimum 116.80% 116.00%
Expected volatility, maximum 117.20% 117.00%
Expected life (in years) 5 years 5 years
Stock Appreciation Rights [Member]    
Dividend yield 0.00% 0.00%
Risk-free interest rate, minimum 0.19% 0.19%
Risk-free interest rate, maximum 0.22% 0.22%
Expected volatility, minimum 116.20% 116.20%
Expected volatility, maximum 116.80% 116.80%
Expected life (in years) 5 years 5 years