RSU activity under the 2020 Plan during the six months ended June 30, 2024, was as follows: | | | | | | | | | | | | | Number of Shares | | Weighted Average Grant Date Fair Value | | Outstanding non-vested, December 31, 2023 | 1,670,509 | | | $ | 15.44 | | | Shares granted | 1,104,000 | | | 12.19 | | | Shares vested | (681,353) | | | 15.49 | | | Shares forfeited | (141,562) | | | 15.11 | | | Outstanding non-vested, June 30, 2024 | 1,951,594 | | | $ | 13.57 | |
The following assumptions were used in the Monte Carlo simulation for computing the grant date fair value of the PSUs issued during the six months ended June 30, 2024 and 2023: | | | | | | | | | | | | | 2024 | | 2023 | | Volatility | 79 | % | | 90 | % | | Risk-free interest rate | 4.62 | % | | 3.74 | % | | Dividend yield | — | % | | — | % |
PSU activity under the 2020 Plan during the six months ended June 30, 2024, was as follows: | | | | | | | | | | | | | Number of Shares | | Weighted Average Grant Date Fair Value | | Outstanding non-vested, December 31, 2023 | 692,473 | | | $ | 14.54 | | | Shares granted | 586,316 | | | 11.74 | | | Shares vested | — | | | — | | | Shares forfeited | (128,399) | | | 21.53 | | | Outstanding non-vested, June 30, 2024 | 1,150,390 | | | $ | 12.80 | |
|