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SHARE-BASED COMPENSATION | 12 Months Ended
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Dec. 31, 2022
STOCK-BASED COMPENSATION |
STOCK-BASED COMPENSATION | 10. STOCK-BASED COMPENSATION 2015 Equity Incentive Plan. The 2015 Equity Incentive Plan (“2015 Plan”), as approved by stockholders and further amended in May 2021, allows for the issuance of up to 4,500,000 shares of common stock. The 2015 Plan allows for stock-based awards to be granted to directors, employees and consultants and allows for a variety of forms of awards, including stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalents and performance-based compensation. Stock option awards have maximum 10-year terms and no awards issued under the 2015 Plan vest on an accelerated basis if there is a change in control of the Company, unless the awards are not assumed by the successor, as defined. Performance-Based Shares. The Company issued a total of 136,669 performance-based shares to its executives in 2022, of which 5,734 performance-based shares were canceled in April 2022. The vesting for these performance-based shares is based on the compounded annual growth rate of the Company’s Adjusted EBITDA and Free Cash Flow Per Share, as defined, for the three-year periods ending December 31, 2022, December 31, 2023, and December 31, 2024. For the 2022 period, one-sixth of such performance-based shares either vested or will vest on the anniversary date of the awards and one-sixth were canceled, as only one of the Company’s two growth-rate targets for such period was achieved. Vesting of the remaining performance-based shares requires satisfaction of similar conditions for the 2023 and 2024 periods. Restricted Stock Awards. On May 19, 2022, the Company issued to non-executive members of its Board of Directors, as compensation for their annual service, a total of 51,849 restricted shares under the 2015 Plan, with a one-year vesting period. As of December 31, 2022, the Company had 1,173,096 stock-based awards authorized by stockholders and available for grant from the 2015 Plan. Stock Options. The following table summarizes information related to the Company’s common stock options:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ |  | ​ |  | Weighted | ​ | Remaining | ​ | ​ | ​
​ | ​ | Number | ​ | Average | ​ | Contractual | ​ | Aggregate
​ | ​ | of Stock | ​ | Exercise | ​ | Term | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | (in years) | ​ | Value
Options outstanding at January 1, 2022 |  | 3,221,956 | ​ | $ | 2.19 |  |  |  | ​ |
Granted |  | 434,598 | ​ |  | 7.71 |  |  |  | ​ |
Exercised |  | (103,319) | ​ |  | 1.81 |  |  |  | ​ |
Canceled/Forfeited |  | (50,000) | ​ |  | 8.72 |  |  |  | ​ |
Expired |  | — | ​ |  | — |  |  |  | ​ |
Options outstanding at December 31, 2022 |  | 3,503,235 | ​ | $ | 2.80 |  | 4.79 | ​ | $ | 17,117,870
Options exercisable at December 31, 2022 |  | 2,816,558 | ​ | $ | 1.87 |  | 3.82 | ​ | $ | 16,015,085
​ ​ Compensation Cost. Compensation expense is as follows for the two years ended December 31, 2022:
​ | ​ | ​ | ​ | ​ | ​ | ​
(In thousands) | ​ | Year Ended
​ | ​ | December 31,
Compensation Expense | ​ | 2022 | ​ | 2021
Stock options | ​ | $ | 1,150 | ​ | $ | 649
Restricted and performance-based shares | ​ |  | 543 | ​ |  | 317
​ | ​ | $ | 1,693 | ​ | $ | 966
​ As of December 31, 2022, there was approximately $2.0 million of unrecognized compensation cost related to unvested stock options granted by the Company, which is expected to be recognized over a weighted-average period of 1.9 years. As of such date, there was also $1.1 million of unrecognized compensation cost related to unvested restricted and performance shares, which is expected to be recognized over a weighted-average period of 1.4 years. The Company estimates the fair value of each stock option award on the grant date using the Black-Scholes valuation model. Option valuation models require the input of highly subjective assumptions, and changes in assumptions used can materially affect the fair value estimate. Option valuation weighted-average assumptions were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2022 | ​ | 2021
Expected volatility |  | 68.38 | % | ​ | 65.99 | %
Expected dividend yield |  | — | % | ​ | — | %
Expected term (in years) |  | 6.00 |  | ​ | 6.00 | ​
Weighted average risk-free rate |  | 2.56 | % | ​ | 0.97 | %
​ Expected volatility is based on the historical volatility of our stock price. Dividend yield is based on the estimate of annual dividends expected to be paid at the time of the grant. The expected term considers the contractual term of the option as well as historical exercise and forfeiture behavior. The risk-free interest rate is based on the rates in effect on the grant date for U.S. Treasury instruments with maturities matching the relevant expected term of the award. Therefore, the weighted-average grant date fair value of options granted is as follows for the two years ended December 31, 2022:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2022 | ​ | 2021
Weighted average grant date fair value | ​ | $ | 4.39 | ​ | $ | 5.68
​

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