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Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of reconciliation of changes in common shares issued | A reconciliation of the changes in common shares issued is as follows:
| Year ended December 31,
| 2019 |  | 2018
Shares issued at the beginning of the year | 62,162,875 |  |  | 60,622,986 |
Issued as restricted stock award grants | 924,022 |  |  | 1,539,889 |
Issued as restricted stock unit grants | 570,000 |  |  | — |
Shares issued at the end of the year | 63,656,897 |  |  | 62,162,875 |
Schedule of Stock Options | No stock options vested during the years ended December 31, 2019, 2018, and 2017.
Stock Options | Shares |  | Weighted-Average Exercise Price
Outstanding as of January 1, 2019 | — |  |  | $ | — |
Granted | 3,000,000 |  |  | 1.22 |
Exercised | — |  |  | — |
Forfeited | — |  |  | — |
Expired | — |  |  | — |
Outstanding as of |  |  |
December 31, 2019 | 3,000,000 |  |  | $ | 1.22 |
Vested or expected to vest at |  |  |
December 31, 2019 | — |  |  | $ | — |
Options exercisable as of |  |  |
December 31, 2019 | — |  |  | $ | — |
Schedule of Valuation Assumptions | The following table sets forth significant assumptions used in the Black-Scholes model for time-vested options and the Monte Carlo model for performance-based options to determine the fair value of the options at December 31, 2019.
| Time-Vested Options |  | Performance-Based Options
Risk-free interest rate | 1.81 | % |  | 1.84 | %
Expected volatility of common stock | 73.59 | % |  | 71.57 | %
Expected life of options in years | 5.0 |  |  | 7.0 |
Dividend yield | — | % |  | — | %
Vesting period in years | 5.0 |  |  | 7.0 |
Schedule of restricted stock activity | Restricted stock share activity for the year ended December 31, 2019 is as follows:
Restricted Stock Shares |  | Shares |  | Weighted- Average Fair Value at Date of Grant
Non-vested at January 1, 2019 |  | 1,050,372 |  |  | $ | 3.47 |
Granted to employees |  | 1,494,022 |  |  | 2.62 |
Vested |  | (615,941 | ) |  | 3.72 |
Forfeited |  | (299,433 | ) |  | 3.16 |
Non-vested at December 31, 2019 |  | 1,629,020 |  |  | $ | 2.66 |
Schedule of restricted stock unit activity | Restricted stock units activity for the year ended December 31, 2019 is as follows:
Restricted Stock Units |  | Units |  | Weighted- Average Fair Value at Date of Grant
RSU equivalents at January 1, 2019 |  | 301,766 |  |  | $ | 3.94 |
2018 equivalents forfeited |  | (272,046 | ) |  | 6.39 |
Total equivalents |  | 29,720 |  |  | — |
2019 equivalents granted |  | 1,071,530 |  |  | 3.75 |
2019 equivalents forfeited |  | (62,776 | ) |  | 1.66 |
RSU equivalents at December 31, 2019 |  | 1,038,474 |  |  | $ | 3.24 |

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