Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Weighted Average Assumptions (Details)

v3.20.1
Stock-based Compensation - Weighted Average Assumptions (Details) - Stock Options
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Weighted average assumptions    
Dividend yield 0.00% 0.00%
Expected volatility 100.00% 103.00%
Risk-free interest rate 0.90% 2.55%
Expected term 5 years 6 months 26 days 5 years 7 months 6 days