Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation

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Stock-Based Compensation
6 Months Ended
Jun. 30, 2024
Equity [Abstract]  
Stock-Based Compensation
Stock-Based Compensation
We adopted a 2006 Stock Option and Incentive Plan, or the Plan, under which the Board of Directors may grant incentive or non-qualified stock options and stock grants to key employees, directors, advisors and consultants. The Plan was amended at various dates by the Board of Directors to increase the reserved shares of common stock issuable under the Plan to 3,838,750 as of June 30, 2024, and in June 2017 stockholders approved an amendment to extend the termination date of the Plan to January 1, 2026 ("Amended Plan").
Stock options vest based upon the terms within the individual option grants, with an acceleration of the unvested portion of such options upon a change in control event, as defined in the Amended Plan. The options are not transferable except by will or domestic relations order. The option price per share under the Amended Plan cannot be less than the fair market value of the underlying shares on the date of the grant. The number of shares remaining available for future issuance under the Amended Plan as of June 30, 2024 was 1,021,768.
During the six months ended June 30, 2024, we did not grant any options to purchase shares of common stock or issue any stock grants under the Amended Plan.
We adopted the 2022 Stock Incentive Plan (the "2022 Plan"), under which the Board of Directors may grant incentive or non-qualified stock options and stock grants to key employees, directors, advisors and consultants. We have reserved 3,800,000 shares of our common stock for issuance pursuant to awards under the 2022 Plan. The adoption of the 2022 Plan was approved by our shareholders on June 9, 2022.
Under the 2022 Plan, stock options vest based upon the terms within the individual option grants, with an acceleration of the unvested portion of such options upon a change in control event, as defined in the 2022 Plan. The options are not transferable except by will or domestic relations order. The option price per share under the 2022 Plan cannot be less than the fair market value of the underlying shares on the date of the grant. The number of shares remaining available for future issuance under the Plan as of June 30, 2024 was 2,943,750.
During the six months ended June 30, 2024, we granted non-qualified options to purchase an aggregate of 125,000 shares of common stock under the 2022 Plan at $0.77 per share to certain non-employee directors.
Stock option activity for the six months ended June 30, 2024 was as follows: 
Common Stock Options Number of
Options
Exercise
Price
Per
Share
Weighted Average Exercise Price Weighted
Average
Remaining
Life
Aggregate
Intrinsic
Value
Outstanding, December 31, 2023 3,638,122  $ 0.71  - $ 10.33  $ 1.49  6.70 years $ 127,811 
Granted
125,000  $0.77 $ 0.77 
Exercised
— 
Canceled and forfeited
(816,590) $ 0.74  - $ 10.33  $ 2.73 
Outstanding, June 30, 2024 2,946,532  $ 0.71  - $ 6.74  $ 1.12  6.95 years $ 46,675 
Exercisable, June 30, 2024 1,686,532  $ 1.27  $ 29,525 
Vested and expected to vest, June 30, 2024 2,651,282  $ 1.15    $ 44,103 
Consolidated stock-based compensation expense for the three and six months ended June 30, 2024 and 2023 was $45,464 and $89,998 and $28,589 and $105,937, respectively. No tax benefit was recognized related to the stock-based compensation recorded during the period.
At June 30, 2024, the total compensation cost related to unvested stock option awards not yet recognized is $361,450 and this amount will be recognized over a weighted average period of 2.43 years