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Stock-Based Awards (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period | A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:
|  | December 31, 2020 |
|  | Unrecognized Stock- Based Compensation |  |  | Weighted-Average Remaining Vesting Period (Years) |
Employees and directors |  | $ | 9,776 |  |  |  | 1.28 |
Summary of Option Activity | A summary of option activity is as follows:
|  | Options |  |  | Weighted-Average Exercise Price |
Outstanding January 1, 2018 |  |  | 1,158,828 |  |  | $ | 2.75 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | — |  |  |  | — |
Exercised |  |  | (588,291 | ) |  |  | 1.19 |
Outstanding at December 31, 2018 |  |  | 570,537 |  |  | $ | 4.36 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | (1 | ) |  |  | 6.50 |
Exercised |  |  | (85,000 | ) |  |  | 0.70 |
|  | Options |  |  | Weighted-Average Exercise Price |
Outstanding at December 31, 2019 |  |  | 485,536 |  |  | $ | 4.80 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | (63,536 | ) |  |  | 2.49 |
Exercised |  |  | (117,000 | ) |  |  | 4.81 |
Outstanding at December 31, 2020 (1) |  |  | 305,000 |  |  | $ | 5.68 |
Summary of Information on Stock Options Outstanding | The following table summarizes information on stock options outstanding and exercisable at December 31, 2020:
|  | Options Outstanding and Exercisable |
Range of Exercise Prices |  | Shares |  |  | Weighted- Average Remaining Life (Years) |  |  | Weighted- Average Exercise Price |
$5.05 |  |  | 190,000 |  |  |  | 0.1 |  |  | $ | 5.05 |
$6.42 – $6.82 |  |  | 67,500 |  |  |  | 0.4 |  |  |  | 6.47 |
$7.01 – $7.30 |  |  | 47,500 |  |  |  | 0.8 |  |  |  | 7.07 |
|  |  | 305,000 |  |  |  | 0.3 |  |  | $ | 5.68 |
Summary of Restricted Stock Activity | A summary of activity is as follows:
|  | RSAs |  |  | RSUs |  |  | PRSUs (1) |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |  |  | Shares |  |  | Weighted Average Grant Date Fair Value |  |  | Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested Balance at January 1, 2018 |  |  | 1,816,666 |  |  | $ | 11.75 |  |  |  | 5,678 |  |  | $ | 10.40 |  |  |  | — |  |  | $ | — |
Granted |  |  | 903,231 |  |  |  | 11.77 |  |  |  | 7,152 |  |  |  | 12.21 |  |  |  | — |  |  |  | — |
Vested |  |  | (618,516 | ) |  |  | 12.67 |  |  |  | (1,890 | ) |  |  | 10.40 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (144,279 | ) |  |  | 11.83 |  |  |  | (1,446 | ) |  |  | 11.97 |  |  |  | — |  |  |  | — |
Unvested Balance at December 31, 2018 |  |  | 1,957,102 |  |  | $ | 11.47 |  |  |  | 9,494 |  |  | $ | 11.52 |  |  |  | — |  |  | $ | — |
Granted |  |  | 2,794,703 |  |  |  | 6.16 |  |  |  | 35,283 |  |  |  | 6.45 |  |  |  | 270,872 | (2) |  |  | 6.24 |
Vested |  |  | (1,053,980 | ) |  |  | 11.25 |  |  |  | (5,499 | ) |  |  | 9.85 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (453,267 | ) |  |  | 9.09 |  |  |  | — |  |  |  | — |  |  |  | (38,262 | ) |  |  | 6.24 |
Unvested Balance at December 31, 2019 |  |  | 3,244,558 |  |  | $ | 7.29 |  |  |  | 39,278 |  |  | $ | 7.20 |  |  |  | 232,610 |  |  | $ | 6.24 |
Granted |  |  | 1,653,186 |  |  |  | 3.80 |  |  |  | 32,901 |  |  |  | 3.82 |  |  |  | 117,013 | (2) |  |  | 3.11 |
Vested |  |  | (1,206,879 | ) |  |  | 8.13 |  |  |  | (27,130 | ) |  |  | 7.45 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (110,122 | ) |  |  | 4.79 |  |  |  | (5,641 | ) |  |  | 5.39 |  |  |  | (8,311 | ) |  |  | 6.24 |
Unvested Balance at December 31, 2020 |  |  | 3,580,743 |  |  | $ | 5.38 |  |  |  | 39,408 |  |  | $ | 4.46 |  |  |  | 341,312 |  |  | $ | 5.17 |

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