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Stock-Based Awards (Tables) | 12 Months Ended
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Dec. 31, 2022
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, 2022 |
|  | Unrecognized Stock- Based Compensation |  |  | Weighted-Average Remaining Vesting Period (Years) |
Employees and directors |  | $ | 12,536 |  |  |  | 1.38 |
Summary of Option Activity | A summary of option activity is as follows:
|  | Options |  | Weighted-Average Exercise Price
Outstanding January 1, 2020 |  |  | 485,536 |  |  | $ | 4.80 |
Forfeitures/expirations |  |  | (63,536 | ) |  |  | 2.49 |
Exercised |  |  | (117,000 | ) |  |  | 4.81 |
Outstanding at December 31, 2020 |  |  | 305,000 |  |  | $ | 5.68 |
Forfeitures/expirations |  |  | (162,500 | ) |  |  | 5.72 |
Exercised |  |  | (142,500 | ) |  |  | 5.64 |
Outstanding at December 31, 2021 |  |  | — |  |  | $ | — |
Summary of Restricted Stock Activity | A summary of activity is as follows:
|  | RSA |  | RSU |  | PRSU (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, 2020 |  |  | 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 |
Granted |  |  | 1,642,266 |  |  |  | 5.46 |  |  |  | 31,170 |  |  |  | 5.43 |  |  |  | 257,043 | (2) |  |  | 6.49 |
Vested |  |  | (1,897,699 | ) |  |  | 5.78 |  |  |  | (15,136 | ) |  |  | 4.73 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (288,405 | ) |  |  | 5.11 |  |  |  | (452 | ) |  |  | 5.37 |  |  |  | (47,669 | ) |  |  | 5.74 |
Unvested Balance at December 31, 2021 |  |  | 3,036,905 |  |  | $ | 5.20 |  |  |  | 54,990 |  |  | $ | 4.93 |  |  |  | 550,686 |  |  | $ | 5.73 |
Granted |  |  | 2,170,432 |  |  |  | 5.71 |  |  |  | 116,247 |  |  |  | 5.18 |  |  |  | 319,838 | (2) |  |  | 6.80 |
Vested |  |  | (1,621,201 | ) |  |  | 5.31 |  |  |  | (27,894 | ) |  |  | 5.10 |  |  |  | (202,336 | ) |  |  | 6.24 |
Forfeited |  |  | (195,054 | ) |  |  | 5.43 |  |  |  | (1,380 | ) |  |  | 5.73 |  |  |  | — |  |  |  | — |
Unvested Balance at December 31, 2022 |  |  | 3,391,082 |  |  | $ | 5.46 |  |  |  | 141,963 |  |  | $ | 5.09 |  |  |  | 668,188 |  |  | $ | 6.09 |
(1) | Represents the target number of PRSUs granted and outstanding. The number of PRSUs that ultimately vest ranges from 0% to 200% of this amount.
(2) | A Monte Carlo simulation was used to value these awards using the following assumptions for the Company and the peer group: (i) beginning 90-day average stock prices; (ii) valuation date stock prices; (iii) correlation coefficients based upon the price data used to calculate the historical volatilities; and (iv) the following additional assumptions:
Summary of Share Based Payment Awards Other Than OptionsValuation Assumptions |
|  | Granted in 2022 |  |  | Granted in 2021 |  |  | Granted in 2020 |
Historical stock price volatility (low) |  |  | 33 | % |  |  | 34 | % |  |  | 21 | %
Historical stock price volatility (high) |  |  | 57 | % |  |  | 57 | % |  |  | 36 | %
Historical stock price volatility (average) |  |  | 44 | % |  |  | 44 | % |  |  | 26 | %
Risk free interest rate |  |  | 1.28 | % |  |  | 0.17 | % |  |  | 1.47 | %
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %

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