Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Stockholders' Equity - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dividend yield 0.00% 0.00%
Risk-free interest rate, minimum 1.42% 2.68%
Risk-free interest rate, maximum 2.53% 3.10%
Expected volatility, minimum 105.20% 104.90%
Expected volatility, maximum 112.10% 137.30%
Minimum [Member]    
Expected life (in years) 5 years 5 years
Maximum [Member]    
Expected life (in years) 10 years 10 years