Annual report pursuant to Section 13 and 15(d)

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

v3.21.1
Stock-Based Compensation - Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]    
Risk-free interest rate 0.75% 2.34%
Expected life 6 years 6 months 5 years 10 months 25 days
Expected volatility 123.71% 128.58%
Dividend yield 0.00% 0.00%