Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions (Details)

v3.20.4
Stock-Based Compensation - Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement [Abstract]    
Risk-free interest rate 2.34% 2.71%
Expected life 5 years 10 months 25 days 6 years
Expected volatility 128.58% 127.18%
Dividend yield 0.00% 0.00%