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Stockholders’ Equity | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Stockholders’ Equity | (6) Stockholders’ Equity (a) Preferred Stock The Company is authorized to issue 5,000,000 shares of $0.01 par value preferred stock with such designations, rights and preferences as may be determined by the Board. Of our authorized preferred stock, 4,000,000 shares have been designated as Series A Junior Participating Preferred Stock and 10,000 shares have been designated as Series B Convertible Preferred Stock. Series A Junior Participating Preferred Stock On May 10, 2023, the Company filed a Certificate of Increase in Delaware, increasing the number of preferred stock designated as Series A Junior Participating Preferred Stock to 4,000,000 from 250,000 shares. Series B Convertible Preferred Stock The Company has designated 10,000 shares of its preferred stock as Series B Convertible Preferred Stock (the “Preferred Stock”). Each share of Preferred Stock has a par value of $0.01 per share and a stated value equal to $1,000 (the “Stated Value”). The shares of Preferred Stock shall initially be issued and maintained in the form of securities held in book-entry form and the Depository Trust Company or its nominee (“DTC”) shall initially be the sole registered holder of the shares of Preferred Stock. Each share of Preferred Stock shall be convertible, at any time and from time to time from and after the Original Issue Date at the option of the Holder thereof or at any time and from time to time on or after the second anniversary of the Original Issue Date at the option of the Corporation, into that number of shares of Common Stock (subject in each case to the limitations determined by dividing the Stated Value of such share of Preferred Stock by the Conversion Price). The conversion price for the Preferred Stock shall be equal to $0.20, subject to adjustment herein (the “Conversion Price”). Pursuant to a registration statement relating to a rights offering declared effective by the SEC on February 14, 2019, AIM distributed to its holders of common stock and to holders of certain options and redeemable warrants as of February 14, 2019, at no charge, one non-transferable subscription right for each share of common stock held or deemed held on the record date. Each right entitled the holder to purchase one unit, at a subscription price of $1,000 per unit, consisting of one share of Series B Convertible Preferred Stock with a face value of $1,000 (and immediately convertible into common stock at an assumed conversion price of $8.80) and 114 warrants with an assumed exercise price of $8.80. The redeemable warrants are exercisable for five years after the date of issuance. The net proceeds realized from the rights offering were approximately $4,700,000. During the year ended December 31, 2023, 7 shares of Series B Convertible Preferred Stock were converted into common stock. As of December 31, 2023 and 2022, the Company had 689 and 696 shares of Series B Convertible Preferred Stock outstanding, respectively. Holders shall be entitled to receive, and the Company shall pay, dividends on shares of Series B Preferred Stock equal (on an as-if-converted-to-Common-Stock basis) to and in the same form as dividend actually paid on shares of Common Stock when as and if such dividends are paid on shares of the Common Stock. Each such Preferred Share is convertible into 114 shares of common stock. Upon any liquidation, dissolution or winding-up of the Company, whether voluntary or involuntary, the Holders shall be entitled to receive out of the assets, whether capital or surplus of the Company the same amount that a holder of Common Stock would receive if the Preferred Stock was fully converted. The Series B Convertible Preferred Stock does not carry voting Rights. (b) Common Stock and Equity Finances The Company has authorized shares of 350,000,000 with specific limitations and restrictions on the usage of 8,000,000 of the 350,000,000 authorized shares. As of December 31, 2023 and 2022, there were 49,102,484 and 48,084,287 shares of Common Stock issued and outstanding, respectively. Employee Stock Purchase Plan (Not equity compensation) On July 7, 2020, the Board approved a plan pursuant to which all directors, officers, and employees could purchase from the Company up to an aggregate of $500,000 worth of shares at the market price (including subsequent plans, the “Employee Stock Purchase Plan”). Pursuant to NYSE American rules, this plan was effective for a sixty-day period commencing upon the date that the NYSE American approved the Company’s Supplemental Listing Application. The Company created successive new plans following the expiration of the July 7, 2020 plan. The latest plan was approved by the Board in January 2024 and expires in March 2024. During the year ended December 31, 2023, the Company issued a total of 419,285 shares of its Common Stock at a price ranging from $0.31 to $0.67 for total proceeds of approximately $150,500 as part of the employee stock purchase plan. During the year ended December 31, 2022, the Company issued a total of 86,817 shares of its Common Stock at prices ranging from $0.76 to $1.02 for total proceeds of $80,000 as part of the employee stock purchase plan. Warrants (Rights offering) On September 27, 2019, the Company closed a public offering underwritten by A.G.P./Alliance Global Partners, LLC (the “Offering”) of (i) 1,740,550 shares of Common Stock; (ii) pre-funded warrants exercisable for 7,148,310 shares of Common Stock (the “Pre-funded Warrants”), and (iii) warrants to purchase up to an aggregate of 8,888,860 shares of Common Stock (the “Warrants”). In conjunction with the Offering, we issued a Representative’s Warrant to purchase up to an aggregate of 266,665 shares of common stock (the “Representative’s Warrant”). The shares of Common Stock and Warrants were sold at a combined Offering price of $0.90, less underwriting discounts and commissions. Each Warrant sold with the shares of Common Stock represents the right to purchase one share of Common Stock at an exercise price of $0.99 per share. The Pre-Funded Warrants and Warrants were sold at a combined Offering price of $0.899, less underwriting discounts and commissions. The Pre-Funded Warrants were sold to purchasers whose purchase of shares of Common Stock in the Offering would otherwise result in the purchaser, together with its affiliates and certain related parties, beneficially owning more than 4.99% of the Company’s outstanding Common Stock immediately following the consummation of the Offering, in lieu of shares of Common Stock. Each Pre-Funded Warrant represents the right to purchase one share of Common Stock at an exercise price of $0.001 per share. The Pre-Funded Warrants are exercisable immediately and may be exercised at any time until the Pre-Funded Warrants are exercised in full. A registration statement on Form S-1, relating to the Offering was filed with the SEC and was declared effective on September 25, 2019, the net proceeds were approximately $7,200,000. During the year ended December 31, 2020, 1,870,000 of the Pre-funded Warrants were exercised and 8,873,960 Warrants were exercised. In addition, on March 25, 2020, the Representative’s Warrant was amended to permit exercise of such warrant to commence on March 30, 2020. These warrants were exercised on March 31, 2020 and an aggregate of 266,665 shares were issued upon exercise of this warrant for gross proceeds of approximately $264,000 and a $46,000 expense for the warrant modification. No Warrants were exercised during the year ended December 31, 2023 and 2022. As of December 31, 2023 and 2022 there are 15,000 Warrants outstanding. Equity Distribution Agreement On April 19, 2023, the Company entered into an Equity Distribution Agreement (the “EDA”) with Maxim Group LLC (“Maxim”), pursuant to which the Company may sell, from time to time, shares of its common stock having an aggregate offering price of up to $8,500,000 through Maxim, as agent (the “Offering”). Sales under the EDA were registered under the S-3 Shelf Registration Statement. Under the terms of the EDA, Maxim will be entitled to a transaction fee at a fixed rate of 3.0% of the gross sales price of shares sold under the EDA. During the year ended December 31, 2023, the Company sold 598,114 shares under the EDA for total gross proceeds of approximately $344,000, which includes a 3.0% fee to Maxim of $10,326. Subsequent to the year ended December 31, 2023, the Company sold 699,568 shares under the EDA for total gross proceeds of $316,392, which includes a 3.0% fee to Maxim of $9,492. Rights Plan On May 12, 2023, the Company amended and restated its November 14, 2017 Rights Plan with American Stock Transfer & Trust Company as Rights Agent (the “Rights Plan”). (c) Common Stock Options and Warrants (i) Stock Options The 2018 Equity Incentive Plan, effective September 12, 2018, authorizes the grant of (i) Incentive Stock Options, (ii) Nonstatutory Stock Options, (iii) Stock Appreciation Rights, (iv) Restricted Stock Awards, (v) Restricted Stock Unit Awards, (vi) Performance Stock Awards, (vii) Performance Cash Awards, and (viii) Other Stock Awards. Initially, a maximum of 7,000,000 shares of common stock is reserved for potential issuance pursuant to awards under the 2018 Equity Incentive Plan. Unless sooner terminated, the 2018 Equity Incentive Plan will continue in effect for a period of 10 years from its effective date. The Equity Incentive Plans of 2018 are administered by the Board of Directors. The Plans provide for awards to be made to such Officers, other key employees, non-employee Directors, consultants and advisors of the Company and its subsidiaries as the Board may select. Stock options awarded under the Plans may be exercisable at such times (not later than 10 years after the date of grant) and at such exercise prices (not less than fair market value at the date of grant) as the Board may determine. The Board may provide for options to become immediately exercisable upon a “change in control”, which is defined in the Plans to occur upon any of the following events: (a) the acquisition by any person or group, as beneficial owner, of 20% or more of the outstanding shares or the voting power of the outstanding securities of the Company; (b) either a majority of the Directors of the Company at the annual stockholders meeting has been nominated other than by or at the direction of the incumbent Directors of the Board, or the incumbent Directors cease to constitute a majority of the Company’s Board; (c) the Company’s stockholders approve a merger or other business combination pursuant to which the outstanding common stock of the Company no longer represents more than 50% of the combined entity after the transaction; (d) the Company’s stockholders approve a plan of complete liquidation or an agreement for the sale or disposition of all or substantially all of the Company’s assets; or (e) any other event or circumstance determined by the Company’s Board to affect control of the Company and designated by resolution of the Board as a change in control. The fair value of each option award is estimated on the date of grant using a Black-Scholes-Merton pricing option valuation model. Expected volatility is based on the historical volatility of the price of the Company’s stock. The risk-free interest rate is based on U.S. Treasury issues with a term equal to the expected life of the option and equity warrant. The Company uses historical data to estimate expected dividend yield, life and forfeiture rates. The expected life of the options and equity warrants was estimated based on historical option and equity warrant holders’ behavior and represents the period of time that options and equity warrants are expected to be outstanding. The fair values of the options granted were estimated based on the following weighted average assumptions: Schedule of Options and Equity Estimated Based on Weighted Average Assumptions
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Risk-free interest rate |  |  | 4.37 | % |  |  | 1.74% - 3.88% |
Expected dividend yield |  |  | — |  |  |  | — |
Expected life |  |  | 10 years |  |  |  | 10 years |
Expected volatility |  |  | 99.91 | % |  |  | 98.43% - 107.18% |
Weighted average grant date fair value for options issued |  |  | $0.43 per option for 400,000 options |  |  |  | $0.51 per option for 850,000 options |
The exercise price of all stock options and equity warrants granted was equal to or greater than the fair market value of the underlying common stock on the date of the grant. Information regarding the options approved by the Board of Directors under the Equity Plan of 2009 is summarized below. The plan expired on June 24, 2019: Schedule of Stock Option Activity
|  | 2023 |  |  | 2022 |
|  |  |  |  | Option |  |  | Weighted Average Exercise |  |  |  |  |  | Option |  |  | Weighted Average Exercise |
|  | Shares |  |  | Price |  |  | Price |  |  | Shares |  |  | Price |  |  | Price |
Outstanding, beginning of year |  |  | 124,399 |  |  |  | 13.20 – 1,003.20 |  |  |  | 22.23 |  |  |  | 128,504 |  |  |  | 13.20 – 2,127.84 |  |  |  | 25.58 |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | (5,047 | ) |  |  | 9.68-327.36 |  |  |  | 57.79 |  |  |  | (4,105 | ) |  |  | 16.76-2,127.84 |  |  |  | 129.88 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding, end of year |  |  | 119,352 |  |  |  | 13.20-2,127.84 |  |  |  | 20.72 |  |  |  | 124,399 |  |  |  | 13.20-1,003.20 |  |  |  | 22.23 |
Exercisable, end of year |  |  | 119,352 |  |  |  | 13.20-2,127.84 |  |  |  |  |  |  |  | 124,399 |  |  |  | 13.20-1,003.20 |  |  |  |  |
Weighted average remaining contractual life (years) |  |  | 4.06 years |  |  |  |  |  |  |  |  |  |  |  | 5.98 years |  |  |  |  |  |  |  |  |
Information regarding the options approved by the Board of Directors under the Equity Plan of 2018 is summarized below: Schedule of Stock Option Activity
|  | 2023 |  |  | 2022 |
|  |  |  |  | Option |  |  | Weighted Average Exercise |  |  |  |  |  | Option |  |  | Weighted Average Exercise |
|  | Shares |  |  | Price |  |  | Price |  |  | Shares |  |  | Price |  |  | Price |
Outstanding, beginning of year |  |  | 2,474,971 |  |  |  | 0.31-9.68 |  |  |  | 1.72 |  |  |  | 1,650,017 |  |  |  | 1.11 – 9.68 |  |  |  | 2.35 |
Granted |  |  | 400,000 |  |  |  | 0.47-0.47 |  |  |  | 0.47 |  |  |  | 850,000 |  |  |  | 0.31 – 1.71 |  |  |  | 0.51 |
Forfeited |  |  | (60,829 | ) |  |  | 0.31-9.68 |  |  |  | 1.98 |  |  |  | (25,046 | ) |  |  | 1.85 – 9.68 |  |  |  | 1.86 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding, end of year |  |  | 2,814,142 |  |  |  | 0.31-9.68 |  |  |  | 1.54 |  |  |  | 2,474,971 |  |  |  | 0.31 – 9.68 |  |  |  | 1.72 |
Exercisable, end of year |  |  | 2,397,474 |  |  |  | 0.31-327.36 |  |  |  | 4.71 |  |  |  | 1,916,637 |  |  |  | 0.41 – 9.68 |  |  |  | 2.22 |
Weighted average remaining contractual life (years) |  |  | 7.96 years |  |  |  |  |  |  |  |  |  |  |  | 9.65 years |  |  |  |  |  |  |  |  |
Available for future grants |  |  | 1,210,286 |  |  |  |  |  |  |  |  |  |  |  | 466,120 |  |  |  |  |  |  |  |  |
Stock option activity during the years ended December 31, 2023 and 2022 is as follows: Vested stock option activity for employees: Schedule of Vest Stock Option Activity
|  | Number of |  |  | Weighted Average Exercise |  |  | Weighted Average Remaining Contracted Term |  |  | Aggregate Intrinsic |
|  | Options |  |  | Price |  |  | (Years) |  |  | Value |
Outstanding December 31, 2021 |  |  | 1,498,798 |  |  | $ | 4.22 |  |  |  | 9.11 |  |  |  | — |
Granted |  |  | 550,000 |  |  |  | 0.49 |  |  |  | 9.71 |  |  |  | — |
Forfeited |  |  | (28,584 | ) |  |  | 17.71 |  |  |  | — |  |  |  | — |
Expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding December 31, 2022 |  |  | 2,020,214 |  |  | $ | 3.01 |  |  |  | 8.86 |  |  |  | — |
Granted |  |  | 400,000 |  |  |  | 0.47 |  |  |  | 10.17 |  |  |  | — |
Forfeited |  |  | (7,601 | ) |  |  | 9.68 |  |  |  | — |  |  |  |  |
Expired |  |  | (4,175 | ) |  |  | 41.61 |  |  |  | — |  |  |  | — |
Outstanding December 31, 2023 |  |  | 2,408,438 |  |  | $ | 2.50 |  |  |  | 8.70 |  |  |  | — |
Vested and expected to vest at December 31, 2023 |  |  | 2,041,772 |  |  | $ | 1.90 |  |  |  | 6.73 |  |  |  | — |
Exercisable at December 31, 2023 |  |  | 2,041,772 |  |  | $ | 1.90 |  |  |  | 6.73 |  |  |  | — |
The weighted-average grant-date fair value of employee options vested during the year ended December 31, 2023 was $184,000 for 424,999 options at $0.43 per option and during year ended December 31, 2022 was $768,666 for 575,000 options at $1.34 per option. Unvested stock option activity for employees: Schedule of Unvested Stock Option Activity
|  | Number of |  |  | Weighted Average Exercise |  |  | Average Remaining Contracted Term |  |  | Aggregate Intrinsic |
|  | Options |  |  | Price |  |  | (Years) |  |  | Value |
Unvested December 31, 2021 |  |  | 412,500 |  |  | $ | 4.15 |  |  |  | 5.85 |  |  |  | — |
Granted |  |  | 550,000 |  |  |  | 0.49 |  |  |  | 9.71 |  |  |  | — |
Vested |  |  | (541,590 | ) |  |  | 1.31 |  |  |  | 9.73 |  |  |  | — |
Forfeited |  |  | (28,584 | ) |  |  | 17.71 |  |  |  | — |  |  |  | — |
Unvested December 31, 2022 |  |  | 392,326 |  |  | $ | 0.80 |  |  |  | 8.86 |  |  |  | — |
Granted |  |  | 400,000 |  |  |  | 0.47 |  |  |  | 10.17 |  |  |  | — |
Vested |  |  | (413,884 | ) |  |  | 1.90 |  |  |  | 6.73 |  |  |  | — |
Forfeited |  |  | (7,601 | ) |  |  | 9.68 |  |  |  | — |  |  |  | — |
Expired |  |  | (4,175 | ) |  |  | 41.61 |  |  |  | — |  |  |  | — |
Unvested December 31, 2023 |  |  | 366,666 |  |  | $ | 2.13 |  |  |  | 12.44 |  |  |  | — |
Vested stock option activity for non-employees: Schedule of Vest Stock Option Activity
|  | Number of |  |  | Weighted Average Exercise |  |  | Weighted Average Remaining Contracted Term |  |  | Aggregate Intrinsic |
|  | Options |  |  | Price |  |  | (Years) |  |  | Value |
Outstanding December 31, 2021 |  |  | 279,723 |  |  | $ | 6.12 |  |  |  | 7.93 |  |  |  | — |
Granted |  |  | 300,000 |  |  |  | 0.54 |  |  |  | 9.68 |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | (568 | ) |  |  | 153.12 |  |  |  | — |  |  |  | — |
Outstanding December 31, 2022 |  |  | 579,155 |  |  | $ | 3.09 |  |  |  | 8.36 |  |  |  | — |
Granted |  |  | 360,000 |  |  |  | 0.46 |  |  |  | 10.04 |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Expired |  |  | (653 | ) |  |  | 145.24 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (53,447 | ) |  |  | 1.31 |  |  |  | — |  |  |  | — |
Outstanding December 31, 2023 |  |  | 885,055 |  |  | $ | 2.02 |  |  |  | 9.23 |  |  |  | — |
Vested and expected to vest at December 31, 2023 |  |  | 550,055 |  |  | $ | 2.56 |  |  |  | 10.02 |  |  |  | — |
Exercisable at December 31, 2023 |  |  | 550,055 |  |  | $ | 2.56 |  |  |  | 10.02 |  |  |  | — |
The weighted-average grant-date fair value of non-employee options vested during year 2023 was $90,000 for 191,666 options at $0.47 per option and during the year 2022 was $247,166 for 229,053 options at $1.08 per option. Unvested stock option activity for non-employees: Schedule of Unvested Stock Option Activity
|  | Number of |  |  | Weighted Average Exercise |  |  | Weighted Average Remaining Contracted Term |  |  | Aggregate Intrinsic |
|  | Options |  |  | Price |  |  | (Years) |  |  | Value |
Unvested December 31, 2021 |  |  | 97,831 |  |  | $ | 3.89 |  |  |  | 7.82 |  |  |  | — |
Granted |  |  | 300,000 |  |  |  | 0.54 |  |  |  | 9.68 |  |  |  | — |
Vested |  |  | (229,053 | ) |  |  | 0.82 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (1,989 | ) |  |  | — |  |  |  | — |  |  |  | — |
Unvested December 31, 2022 |  |  | 166,789 |  |  | $ | 4.05 |  |  |  | 9.49 |  |  |  | — |
Granted |  |  | 360,000 |  |  |  | 0.46 |  |  |  | 10.18 |  |  |  | — |
Vested |  |  | (137,565 | ) |  |  | 0.47 |  |  |  | 9.47 |  |  |  | — |
Expired |  |  | (776 | ) |  |  | 145.24 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (53,447 | ) |  |  | 1.31 |  |  |  | — |  |  |  | — |
Unvested December 31, 2023 |  |  | 335,001 |  |  | $ | 1.83 |  |  |  | 10.70 |  |  |  | — |
Stock-based compensation expense was approximately $243,000 and $954,000 for the years ended December 31, 2023 and 2022. As of December 31, 2023 and 2022, there was $294,000 and $217,000, respectively, of unrecognized stock-based compensation cost related to options granted under the Equity Incentive Plans. Stock-based compensation related to options granted under the Equity Incentive Plans will be recorded over the vesting period which is typically one year or upon reaching agreed upon Company and/or individual performance milestones being met which is indefinite. (ii) Stock Warrants Stock warrants are issued as needed by the Board of Directors and have no formal plan. The fair value of each warrant award is estimated on the date of grant using a Black-Scholes-Merton pricing option valuation model. Expected volatility is based on the historical volatility of the price of the Company’s stock. The risk-free interest rate is based on U.S. Treasury issues with a term equal to the expected life of the warrant. The Company uses historical data to estimate expected dividend yield, life and forfeiture rates. The expected life of the warrants was estimated based on historical option holder’s behavior and represents the period of time that options are expected to be outstanding. No warrants were granted in 2023 or 2022. Information regarding warrants outstanding and exercisable into shares of common stock is summarized below: Schedule of Warrants Outstanding and Exercisable
|  | 2023 |  |  | 2022 |
|  |  |  |  | Warrant |  |  | Weighted Average Exercise |  |  |  |  |  | Warrant |  |  | Weighted Average Exercise |
|  | Shares |  |  | Price |  |  | Price |  |  | Shares |  |  | Price |  |  | Price |
Outstanding, beginning of year |  |  | 226,610 |  |  |  | $ 0.99-132.00 |  |  | $ | 9.10 |  |  |  | 294,939 |  |  |  | $0.99 – 469.92 |  |  | $ | 15.19 |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Expired |  |  | (74,450 | ) |  |  | 17.05 |  |  |  | 17.05 |  |  |  | (68,215 | ) |  |  | 469.92 |  |  |  | 469.92 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (114 | ) |  |  | 8.80 |  |  |  | 8.80 |
Outstanding, end of year |  |  | 152,160 |  |  |  | $ 0.99-8.80 |  |  | $ | 8.03 |  |  |  | 226,610 |  |  |  | $ 0.99-132.00 |  |  | $ | 9.10 |
Exercisable |  |  | 152,160 |  |  |  | $ 0.99-8.80 |  |  | $ | 8.03 |  |  |  | 226,610 |  |  |  | $ 0.99-132.00 |  |  | $ | 9.10 |
Weighted average remaining contractual life |  |  | .75 years |  |  |  |  |  |  |  |  |  |  |  | .94 years |  |  |  |  |  |  |  |  |
Years exercisable |  |  | 2024 |  |  |  |  |  |  |  |  |  |  |  | 2023-2024 |  |  |  |  |  |  |  |  |
Stock warrants are issued at the discretion of the Board. During the year ended December 31, 2023, there were no warrants issued or exercised. During the year ended December 31, 2022, there were no warrants issued and 114 were exercised.

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