Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Tables)

v3.21.1
Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Valuation Assumptions
The ranges for the assumptions used in the Monte Carlo model for the PRSUs granted during 2021, 2020 and 2019 are presented as follows:
2021 2020 2019
Expected volatility 126.2  %
101.32% to 117.71%
49.9  %
Dividend yield 0.0  % 0.0  % 0.0  %
Risk-free interest rate 0.22  %
0.18% to 0.51%
1.66  %