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Stock-Based Compensation | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation | 6. Stock-Based Compensation The Company periodically issues common stock and stock options as incentive compensation to directors and as compensation for the services of employees, contractors, and consultants of the Company. On July 14, 2020, the Board of Directors of the Company adopted the 2020 Stock Incentive Plan (the “2020 Plan”), which was subsequently approved by the stockholders of the Company. The 2020 Plan provides for the granting of equity-based awards, consisting of stock options, restricted stock, restricted stock units, stock appreciation rights, and other stock-based awards to employees, officers, directors and consultants of the Company and its affiliates, initially for a total of 233,333 shares of the Company’s common stock, under terms and conditions as determined by the Company’s Board of Directors. On October 7, 2022, the stockholders of the Company approved an amendment to the 2020 Plan to increase the number of common shares issuable thereunder by 180,000 shares, to a total of 413,333 shares. On November 27, 2023, the stockholders of the Company approved an amendment to the 2020 Plan to increase the number of common shares issuable thereunder by 336,667 shares, to a total of 750,000 shares. As of December 31, 2023, unexpired stock options for 495,000 shares were issued and outstanding under the 2020 Plan and 255,000 shares were available for issuance under the 2020 Plan. The fair value of a stock option award is calculated on the grant date using the Black-Scholes option-pricing model. The risk-free interest rate is based on the U.S. Treasury yield curve in effect as of the grant date. The expected dividend yield assumption is based on the Company’s expectation of dividend payouts and is assumed to be zero. The estimated volatility is based on the historical volatility of the Company’s common stock, calculated utilizing a look-back period approximately equal to the contractual life of the stock option being granted. Unless sufficient historical exercise data is available, the expected life of the stock option is calculated as the mid-point between the vesting period and the contractual term (the “simplified method”). The fair market value of the common stock is determined by reference to the quoted market price of the common stock on the grant date. For stock options requiring an assessment of value during the year ended December 31, 2023, the fair value of each stock option award was estimated using the Black-Scholes option-pricing model with the following assumptions: Schedule of Fair Value of Each Option Award Estimated Assumption
Risk-free interest rate |  |  | 4.843 | %
Expected dividend yield |  |  | 0 | %
Expected volatility |  |  | 138.05 | %
Expected life |  |  | 4.0 years |
For stock options requiring an assessment of value during the year ended December 31, 2022, the fair value of each stock option award was estimated using the Black-Scholes option-pricing model with the following assumptions: For stock options requiring an assessment of value during the year ended December 31, 2022, the fair value of each stock option award was estimated using the Black-Scholes option-pricing model utilizing the following assumptions:
Risk-free interest rate |  |  | 3.03% to 3.63 | %
Expected dividend yield |  |  | 0 | %
Expected volatility |  |  | 128.03% to 153.17 | %
Expected life |  |  | 3.5 to 5 years |
On July 15, 2020, as amended on August 12, 2020, in connection with the employment agreement entered into with Eric J. Forman, Mr. Forman was granted stock options to purchase 5,833 shares of the Company’s common stock. The options can be exercised on a cashless basis. The options are exercisable for a period of five years at an exercise price of $71.40 per share, which was equal to the closing market price of the Company’s common stock on the grant date. The options vested 25% on August 12, 2020, 2021 and 2022, respectively, with the final 25% vesting on August 12, 2023. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $400,855 ($68.718 per share), of which $100,214 was attributable to the portion of the stock options fully vested on August 12, 2020 and was therefore charged to operations on that date. The remaining unvested portion of the fair value of the stock options was charged to operations ratably from August 12, 2020 through August 12, 2023. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $61,501 and $100,213 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On August 1, 2020, in connection with an employment agreement entered into with Dr. James S. Miser, M.D., Dr. Miser was granted stock options to purchase 8,333 shares of the Company’s common stock. The options can be exercised on a cashless basis. The options are exercisable for a period of five years at an exercise price of $71.40 per share, which was equal to the closing market price of the Company’s common stock on the effective date of the employment agreement. The options vested 25% on August 1, 2020, 2021 and 2022, respectively, with the final 25% vesting on August 1, 2023. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $572,650 ($68.718 per share), of which $143,163 was attributable to the portion of the stock options fully vested on August 1, 2020 and was therefore charged to operations on that date. The remaining unvested portion of the fair value of the stock options was charged to operations ratably from August 1, 2020 through August 1, 2023. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $83,544 and $143,163 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On August 12, 2020, in connection with the employment agreement entered into with Robert N. Weingarten, Mr. Weingarten was granted stock options to purchase 5,833 shares of the Company’s common stock. The options can be exercised on a cashless basis. The options are exercisable for a period of five years at an exercise price of $71.40 per share, which was equal to the closing market price of the Company’s common stock on the grant date. The options vested 25% on August 12, 2020, 2021 and 2022, respectively, with the final 25% vesting on August 12, 2023. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $400,855 ($68.718 per share), of which $100,214 was attributable to the portion of the stock options fully vested on August 12, 2020 and was therefore charged to operations on that date. The remaining unvested portion of the fair value of the stock options was charged to operations ratably from August 12, 2020 through August 12, 2023. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $61,501 and $100,213 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On April 9, 2021, the Board of Directors appointed Gil Schwartzberg to fill the vacancy created by a former director’s resignation. In connection with his appointment to the Board of Directors, and in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, Mr. Schwartzberg was granted stock options to purchase 25,000 shares of the Company’s common stock, exercisable for a period of five years at an exercise price of $32.00 per share (the closing market price on the grant date), vesting 50% on the grant date and the remainder vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $753,611 ($30.144 per share), of which $376,800 was attributable to the portion of the stock options fully vested on April 9, 2021 and was therefore charged to operations on that date. Although the remaining unvested portion of the fair value of the stock options was being charged to operations ratably from April 9, 2021 through June 30, 2023, the vesting of these stock options terminated on October 30, 2022 as a result of the death of Mr. Schwartzberg on that date. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $126,684 for the year ended December 31, 2022 with respect to these stock options. On May 11, 2021, the Board of Directors appointed Regina Brown to the Board of Directors. In connection with her appointment to the Board of Directors, and in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, Ms. Brown was granted stock options to purchase 25,000 shares of the Company’s common stock, exercisable for a period of five years at an exercise price of $28.00 per share (the closing market price on the grant date), vesting 50% on the grant date and the remainder vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $658,363 ($26.335 per share), of which $329,188 was attributable to the portion of the stock options fully vested on May 11, 2021 and was therefore charged to operations on that date. The remaining unvested portion of the fair value of the stock options was charged to operations ratably from May 11, 2021 through June 30, 2023. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $76,388 and $154,042 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On June 30, 2021, the Board of Directors, in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, granted to each of the five non-officer directors of the Company stock options to purchase 10,000 shares (a total of 50,000 shares) of the Company’s common stock, exercisable for a period of five years at an exercise price of $30.30 per share (the closing market price on the grant date), vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $1,421,095 ($28.423 per share), which was charged to operations ratably from July 1, 2021 through June 30, 2023. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $211,413 and $638,915 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On June 17, 2022, the Board of Directors appointed Bas van der Baan to the Board of Directors. In connection with his appointment to the Board of Directors, and in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, Mr. Baan was granted stock options to purchase 25,000 shares of the Company’s common stock, exercisable for a period of five years at an exercise price of $7.40 per share (the closing market price on the grant date), vesting 50% on the grant date and the remainder vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested, subject to continued service. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $158,525 ($6.341 per share), of which $79,263 was attributable to the portion of the stock options fully vested on June 17, 2022 and was therefore charged to operations on that date. The remaining unvested portion of the fair value of the stock options is being charged to operations ratably from June 17, 2022 through June 30, 2024. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $38,885 and $100,249 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On June 30, 2022, the Board of Directors, in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, granted to each of the five non-officer directors of the Company stock options to purchase 10,000 shares (a total of 50,000 shares) of the Company’s common stock, exercisable for a period of five years at an exercise price of $7.40 per share (the closing market price on the grant date), vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested, subject to continued service. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $316,700 ($6.334 per share), which is being charged to operations ratably from July 1, 2022 through June 30, 2024. The Company recorded charges to general and administrative costs in the consolidated statement of operations of $94,881 and $63,777 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On November 6, 2022, the Board of Directors granted to each of the four officers of the Company stock options to purchase 20,000 shares (a total of 80,000 shares) of the Company’s common stock, exercisable for a period of five years at an exercise price of $20.00 per share, vesting 25% on issuance and 25% on each anniversary date thereafter until fully vested, subject to continued service. The total fair value of the 80,000 stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $262,560 ($3.282 per share), which is being charged to operations ratably from November 6, 2022 through November 6, 2025. The Company recorded a total charge to general and administrative costs in the consolidated statement of operations of $61,448 and $75,520 for the years ended December 31, 2023 and 2022, respectively, with respect to these stock options. On November 6, 2022, the Company issued a stock option, in the form of a warrant, to BioPharmaWorks to purchase 10,000 shares of the Company’s common stock, which was fully vested upon issuance and is exercisable for a period of five years at $5.025 per share (the closing market price on the issue date). The fair value of the warrant, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $43,264 ($4.326 per share) and was charged to general and administrative costs in the consolidated statement of operations on that date. On June 30, 2023, the Board of Directors, in accordance with the Company’s cash and equity compensation package for members of the Board of Directors, granted to each of the four non-officer directors of the Company stock options to purchase 10,000 shares (a total of 40,000 shares) of the Company’s common stock, exercisable for a period of five years at an exercise price of $5.88 per share (the closing market price on the grant date), vesting 12.5% on the last day of each subsequent calendar quarter-end until fully vested, subject to continued service. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $192,593 ($4.8131 per share), which is being charged to operations ratably from July 1, 2023 through June 30, 2025. The Company recorded a total charge to general and administrative costs in the consolidated statement of operations of $48,464 for the year ended December 31, 2023 with respect to these stock options. On September 26, 2023, in connection with the employment agreement entered into with Bas van der Baan, Mr. van der Baan was granted stock options to purchase 250,000 shares of the Company’s common stock. The options can be exercised on a cashless basis. The options are exercisable for a period of five years at an exercise price of $1.95 per share, which was equal to the closing market price of the Company’s common stock on the grant date. The options vest in equal increments quarterly over a three-year period commencing on the last day of each calendar quarter commencing October 1, 2023, subject to continued service. The fair value of these stock options, as calculated pursuant to the Black-Scholes option-pricing model, was determined to be $403,066 ($1.612 per share), which is being charged to operations ratably from September 26, 2023 through September 30, 2026. The Company recorded a charge to general and administrative costs in the consolidated statement of operations of $35,178 for the year ended December 31, 2023 with respect to these stock options. Dr. Philip Palmedo, a director of the Company since 2006, did not stand for re-election to the Company’s Board of Directors at the Company’s annual meeting of stockholders held on October 7, 2022. Gil Schwartzberg, a former director of the Company, died on October 30, 2022. Dr. John S. Kovach, the Chairman of the Board of Directors and the Company’s President and Chief Executive Officer, and Chief Scientific Officer, died on October 5, 2023. Accordingly, the unvested stock options for each such person ceased vesting effective as of the respective dates that their service to the Company terminated. Furthermore, the expiration date of all vested stock options owned by each such person contractually expired one year from the respective dates that each of their services to the Company terminated. A summary of stock-based compensation costs for the years ended December 31, 2023 and 2022 is as follows: Summary of Stock-based Compensation Costs
|  | 2023 |  |  | 2022 |
|  | Years Ended |
|  | December 31, |
|  | 2023 |  |  | 2022 |
Related parties |  | $ | 773,203 |  |  | $ | 1,502,776 |
Non-related parties |  |  | — |  |  |  | 43,264 |
Total stock-based compensation costs |  | $ | 773,203 |  |  | $ | 1,546,040 |
A summary of stock option activity, including options issued in the form of warrants, during the years ended December 31, 2023 and 2022 is as follows: Summary of Stock Option Activity Including Options Form of Warrants
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (in Years) |
Stock options outstanding at December 31, 2021 |  |  | 266,667 |  |  | $ | 37.380 |  |  |  |  |
Granted |  |  | 165,000 |  |  |  | 13.370 |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |
Expired |  |  | (42,188 | ) |  |  | 19.160 |  |  |  |  |
Stock options outstanding at December 31, 2022 |  |  | 389,479 |  |  |  | 29.183 |  |  |  |  |
Granted |  |  | 290,000 |  |  |  | 2.492 |  |  |  |  |
Exercised |  |  | (1,250 | ) |  |  | 5.025 |  |  |  |  |
Expired |  |  | (126,146 | ) |  |  | 28.687 |  |  |  |  |
Stock options outstanding at December 31, 2023 |  |  | 552,083 |  |  | $ | 15.330 |  |  |  | 3.84 |
Stock options exercisable at December 31, 2022 |  |  | 281,979 |  |  | $ | 32.834 |  |  |  |  |
Stock options exercisable at December 31, 2023 |  |  | 252,292 |  |  | $ | 28.387 |  |  |  | 2.89 |
Total deferred compensation expense for the outstanding value of unvested stock options was approximately $670,000 at December 31, 2023, which will be recognized subsequent to December 31, 2023 over a weighted-average period of approximately 26 months. At December 31, 2023, the outstanding common stock options,, including options issued in the form of warrants, are exercisable at the following prices per common share: Schedule of Exercise Prices of Common Stock Options Outstanding and Exercisable Including Options Form of Warrants
Exercise Prices |  |  | Options Outstanding (Shares) |  |  | Options Exercisable (Shares) |
$ | 1.950 |  |  |  | 250,000 |  |  |  | 20,833 |
$ | 5.025 |  |  |  | 8,750 |  |  |  | 8,750 |
$ | 5.880 |  |  |  | 40,000 |  |  |  | 10,000 |
$ | 7.400 |  |  |  | 55,000 |  |  |  | 44,376 |
$ | 20.000 |  |  |  | 65,000 |  |  |  | 35,000 |
$ | 20.600 |  |  |  | 20,000 |  |  |  | 20,000 |
$ | 28.000 |  |  |  | 25,000 |  |  |  | 25,000 |
$ | 30.300 |  |  |  | 30,000 |  |  |  | 30,000 |
$ | 32.100 |  |  |  | 10,000 |  |  |  | 10,000 |
$ | 60.000 |  |  |  | 16,667 |  |  |  | 16,667 |
$ | 66.000 |  |  |  | 3,333 |  |  |  | 3,333 |
$ | 71.400 |  |  |  | 20,000 |  |  |  | 20,000 |
$ | 120.000 |  |  |  | 8,333 |  |  |  | 8,333 |
|  |  |  |  | 552,083 |  |  |  | 252,292 |
Based on a fair market value of $2.35 per share on December 31, 2023, the intrinsic value attributed to exercisable but unexercised common stock options was approximately $8,000 at December 31, 2023. Outstanding stock options to acquire 299,791 shares of the Company’s common stock had not vested at December 31, 2023. The Company expects to satisfy such stock obligations through the issuance of authorized but unissued shares of common stock.

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