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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity | The following table presents certain information related to the activity of our non-vested stock option grants:
| Number of Stock Options |  | Weighted Average Exercise Prices |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding as of December 31, 2022 | 1,250,685 |  |  | $ | 3.71 |  |  | 7.66 |  |  | $ | — |
Granted(1) | — |  |  | — |  |  | — |  |  | — |
Less: Forfeited | 40,000 |  |  | 3.46 |  |  | — |  |  | — |
Less: Expired | 161,925 |  |  | 3.05 |  |  | — |  |  | — |
Less: Exercised | 20,000 |  |  | 3.46 |  |  | — |  |  | — |
Outstanding as of September 30, 2023 | 1,028,760 |  |  | $ | 3.83 |  |  | 8.05 |  |  | $ | 4,140 |
Vested as of September 30, 2023(2) | 950,759 |  |  | $ | 4.78 |  |  | 7.81 |  |  | $ | 4,140 |
Exercisable as of September 30, 2023 | 580,568 |  |  | $ | 4.78 |  |  | 7.81 |  |  | $ | 2,001 |
(1) Contingent options have been excluded from the calculations in the table above. (2) The vested shares are calculated based on all vested shares at September 30, 2023, inclusive of those that have since expired. The weighted average exercise prices, weighted-average remaining contractual term and aggregate intrinsic value is calculated based on only vested shares that are outstanding and exercisable at September 30, 2023.
Schedule of Nonvested Share Activity | The following table presents certain information related to the activity of our non-vested restricted common stock grants:
| Number of Restricted Shares |  | Weighted Average Grant Date Fair Value
Outstanding as of December 31, 2022 | 714,239 |  |  | $ | 2.73 |
Granted (1) | 45,000 |  |  | 5.25 |
Less: Forfeited | 130,546 |  |  | 3.16 |
Less: Vested | 181,334 |  |  | 3.25 |
Outstanding as of September 30, 2023 | 447,359 |  |  | $ | 2.64 |
Share-based Payment Arrangement, Activity | The following table presents our total stock-based compensation expense:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Employee stock-based compensation expense |  |  |  |  |  |  |  |
Pre-tax |  | $ | 350 |  |  | $ | 261 |  |  | $ | 738 |  |  | $ | 792 |
Post-tax (1) |  | 277 |  |  | 206 |  |  | 583 |  |  | 626 |
Director stock-based compensation expense |  |  |  |  |  |  |  |
Pre-tax |  | 60 |  |  | 29 |  |  | 115 |  |  | 132 |
Post-tax (1) |  | 47 |  |  | 23 |  |  | 91 |  |  | 104 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following weighted-average assumptions were used to value the stock options granted:
| 2023 |  | 2022
Expected annual dividend yield | — | % |  | — | %
Expected volatility | 80.84 | % |  | 49.66 | %
Risk-free interest rate | 3.44 | % |  | 2.92 | %
Expected term | 6 years |  | 6 years

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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