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Stock Benefit Plans and Stock-Based Compensation | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Stock Benefit Plans and Stock-Based Compensation | 10. Stock Benefit Plans and Stock-Based Compensation 2016 Equity Incentive Plan In 2016 the Company adopted its 2016 Equity Incentive Plan (the “2016 Plan”), which replaced the Company’s 2005 Employee, Director and Consultant Stock Plan. On October 25, 2018, the Company’s Board of Directors adopted an amendment to the Company’s 2016 Equity Incentive Award Plan. The 2016 Plan allows for the grant of options, restricted stock, restricted stock unit awards and performance unit awards to employees, directors, and consultants of the Company. Upon its adoption, the 2016 Plan had 1,083,333 shares of common stock reserved for issuance. The Board of Directors determines the terms of the grants made under the 2016 Plan. Options granted under the 2016 Plan expire no later than ten years from the date of grant (five years for incentive stock options granted to holders of more than 10% of the Company’s voting stock). Options generally vest over a four-year period and may be immediately exercisable upon a change of control of the Company. The exercise price of incentive stock options may not be less than 100% of the fair value of the Company’s common stock on the date of grant. The exercise price of any option granted to a 10% stockholder may be no less than 110% of the fair value of the Company’s common stock on the date of grant. Restricted stock unit awards and performance unit awards generally vest over a three or four year period and vest immediately upon a change in control of the Company. On June 17, 2020, the Company’s shareholders approved an amendment to the Company’s 2016 Equity Incentive Award Plan which increased the shares of common stock available for issuance under the Equity Plan by 7,000,000 shares. As of December 31, 2022, approximately 791,000 shares of common stock remained available for issuance under the 2016 Plan. The 2016 Plan will expire in May 2026. 2016 Employment Inducement Award Plan On October 4, 2016, the Company’s Board of Directors adopted the 2016 Employment Inducement Award Plan (the “Inducement Plan”). The Inducement Plan allows for the grant of options, restricted stock, restricted stock unit awards and performance unit awards to new employees of the Company by granting an award to such new employee as an inducement for the employee to begin employment with the Company. As of December 31, 2022 the Inducement Plan had approximately 477,000 shares of common stock reserved for issuance, which may only be granted to an employee who has not previously been an employee or member of the board of directors of the Company. The terms of the Inducement Plan are substantially similar to the terms of the Company’s 2016 Plan with two principal exceptions: (i) incentive stock options may not be granted under the Inducement Plan; and (ii) the annual compensation paid by the Company to specified executives will be deductible only to the extent that it does not exceed $1.0 million. 2019 Management Objective Strategic Incentive Plan Under the 2019 Management Objective Strategic Incentive Plan, the Company is authorized to grant up to 500,000 shares of common stock to third-party individuals or entities that do not qualify under the Company’s other existing equity plans, with a maximum grant of 50,000 shares per participant. As of December 31, 2022, approximately 213,000 restricted shares and approximately 12,500 common stock warrants have been granted under the 2019 Management Objective Strategic Incentive Plan. 2017 Distributor Inducement Plan Under the 2017 Distributor Inducement Plan, the Company is authorized to grant up to 1,000,000 shares of common stock to independent third-party sales agents whereby, upon the achievement of certain Company sales and/or distribution milestones the Company may grant to an independent sales agent shares of common stock or warrants to purchase shares of common stock. The warrants and restricted stock units issued under the plan are subject to time based or net sales-based vesting conditions. As of December 31, 2022, approximately 305,000 warrants and 414,000 shares of restricted common stock were granted under the 2017 Distributor Inducement Plan. As of December 31, 2022, approximately 295,000 warrants and approximately 392,000 shares of common stock were earned or issued. 2017 Development Services Plan Under the 2017 Development Services Plan, the Company is authorized to issue up to 8,000,000 shares of common stock to third-parties upon the achievement of certain revenue milestones associated with certain developed royalty-bearing products. Future royalty payments for product and/or intellectual property development work may be paid in either cash or restricted shares of the Company’s common stock at the election of the developer, depending on the terms of the agreement. Each common stock issuance is contingent on net sales-based criteria and other provisions, including the satisfaction of applicable laws regarding the issuance of restricted shares to such developers. The Company has entered into Development Services Agreements for development of a wide variety of potential products and intellectual property, with the possibility of issuing shares of common stock. As of December 31, 2022, no shares have been issued and the majority of the agreements are not deemed probable of common stock issuance at this time. The Company recognizes stock-based compensation once the achievement of the performance criteria and vesting conditions are deemed probable. Stock-Based Compensation Costs The compensation cost that has been included in the Company’s consolidated statements of operations for all stock-based compensation arrangements is detailed as follows (in thousands):
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Cost of sales |  | $ | 2,597 |  |  | $ | 737 |  |  | $ | 512 |
Research and development |  |  | 5,016 |  |  |  | 4,056 |  |  |  | 2,114 |
Sales, general and administrative |  |  | 32,943 |  |  |  | 31,657 |  |  |  | 15,033 |
Total |  | $ | 40,556 |  |  | $ | 36,450 |  |  | $ | 17,659 |
Stock Options A summary of the Company’s stock option activity under the Plans and related information is as follows (in thousands, except as indicated and per share data):
|  | Shares |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term (in years) |  |  | Aggregate intrinsic value |
Outstanding at December 31, 2021 |  |  | 3,351 |  |  | $ | 3.50 |  |  |  |  |  |  |
Exercised |  |  | (378 | ) |  |  | 2.84 |  |  |  |  |  |  |
Forfeited |  |  | (57 | ) |  |  | 13.83 |  |  |  |  |  |  |
Outstanding at December 31, 2022 |  |  | 2,916 |  |  | $ | 3.38 |  |  |  | 4.58 |  |  | $ | 26,783 |
Options vested and expected to vest at December 31, 2022 |  |  | 2,916 |  |  | $ | 3.38 |  |  |  | 4.58 |  |  | $ | 26,783 |
Options exercisable at December 31, 2022 |  |  | 2,849 |  |  | $ | 3.22 |  |  |  | 4.51 |  |  | $ | 26,550 |
The weighted-average grant-date fair value per share of stock options granted during the years ended December 31, 2021 and 2020 was $9.88 and $4.71, respectively. There were no stock options granted during the year ended December 31, 2022. The total intrinsic value of stock options exercised was $3.4 million, $6.8 million and $2.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. The aggregate intrinsic value of options at December 31, 2022 is based on the Company’s closing stock price on the last business day of 2022 of $12.35 p er share. The weighted average assumptions used to compute the stock-based compensation costs for the stock options granted during the years ended December 31, 2021 and 2020 are as follows:
| Year Ended December 31, |
|  | 2021 |  |  | 2020 |
Risk-free interest rate |  |  | 0.84 | % |  |  | 1.03 | %
Expected dividend yield |  |  | — |  |  |  | — |
Weighted average expected life (years) |  |  | 6.07 |  |  |  | 6.08 |
Volatility |  |  | 87.38 | % |  |  | 84.00 | %
As of December 31, 2022, there was $0.3 million of unrecognized compensation expense for stock options which is expected to be recognized on a straight-line basis over a weighted average period of approximately 1.75 years. Restricted Stock Units and Performance Based Restricted Stock Units The following table summarizes information about the restricted stock units and performance-based restricted units activity (in thousands, except as indicated and per share data):
|  | Shares |  |  | Weighted average grant date fair value |  |  | Weighted average remaining recognition period (in years) |
Unvested at December 31, 2021 |  |  | 8,703 |  |  | $ | 6.34 |  |  |  |
Awarded |  |  | 3,909 |  |  |  | 8.13 |  |  |  |
Vested |  |  | (3,316 | ) |  |  | 4.68 |  |  |  |
Forfeited |  |  | (763 | ) |  |  | 6.30 |  |  |  |
Unvested at December 31, 2022 |  |  | 8,533 |  |  | $ | 6.63 |  |  |  | 1.43 |
The weighted-average grant-date fair value per share of awards granted during the years ended December 31, 2022, 2021 and 2020 was $8.13, $12.79 and $4.87, respectively. The total fair value of RSUs that vested during the years ended December 31, 2022, 2021 and 2020 was $35.2 million, $43.9 million and $13.1 million, respectively. As of December 31, 2022, there was $41.4 million of unrecognized compensation expense for restricted stock awards, restricted stock units, and performance-based restricted units which is expected to be recognized on a straight-line basis over a weighted average period of approximately 1.43 years. Employee Stock Purchase Plan In 2007, the Company adopted the Alphatec Holdings, Inc. 2007 Amended and Restated Employee Stock Purchase Plan (the “ESPP”), which was first amended in May 2017. On June 16, 2021, the Company’s shareholders approved a second amendment to the ESPP which increased the amount of shares of common stock available for purchase under the ESPP by 500,000 shares. The ESPP provides eligible employees with a means of acquiring equity in the Company at a discounted purchase price using their own accumulated payroll deductions. Under the terms of the ESPP, employees can elect to have up to 20% of their annual compensation, up to a maximum of $21,250 per year, withheld to purchase shares of Company common stock for a purchase price equal to 85% of the lower of the fair market value per share (at closing) of Company common stock on (i) the commencement date of the six-month offering period or (ii) the respective purchase date. During the years ended December 31, 2022, 2021 and 2020 there were approximately 429,000, 227,000 and 379,000 shares of common stock, issued under the ESPP, respectively. The Company recognized $1.6 million, $1.1 million and $1.0 million in expense related to the ESPP for the years ended December 31, 2022, 2021 and 2020, respectively. As of December 31, 2022, approximately 119,000 shares were available under the ESPP for future issuance. The Company estimates the fair value of shares issued to employees under the ESPP using the Black-Scholes option-pricing model. The assumptions used to estimate the fair value of stock purchase rights under the ESPP are as follows:
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Risk-free interest rate |  | 0.07% - 4.54% |  |  | 0.04% - 0.12% |  |  | 0.12% - 1.58% |
Expected dividend yield |  |  | — |  |  |  | — |  |  |  | — |
Expected term (years) |  | 0.50 - 0.60 |  |  |  | 0.50 |  |  |  | 0.50 |
Volatility |  | 50.29% - 64.53% |  |  | 49.98% - 78.37% |  |  | 54.96% - 102.5% |
Common Stock Reserved for Future Issuance Common stock reserved for future issuance consists of the following (in thousands):
|  | December 31, 2022 |
Stock options outstanding |  |  | 2,916 |
Unvested restricted stock units |  |  | 8,533 |
Employee stock purchase plan |  |  | 119 |
Senior convertible notes |  |  | 17,246 |
Warrants outstanding |  |  | 15,491 |
Authorized for future grant under the Distributor and Development Services plans |  |  | 281 |
Authorized for future grant under the Management Objective Strategic Incentive Plan |  |  | 274 |
Authorized for future grant under the Company Equity plans |  |  | 1,269 |
|  |  | 46,129 |

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