v3.26.1
Stockholders' Equity
 6 Months Ended
Jun. 30, 2026
Equity [Abstract]  
Stockholders' Equity STOCKHOLDERS’ EQUITY
Equity Line
On October 21, 2024, the Company entered into a purchase agreement and registration rights agreement with Lincoln Park Capital Fund, LLC, or Lincoln Park. Under the terms and subject to the conditions of the purchase agreement, the Company has the right, but not the obligation, to sell to Lincoln Park, and Lincoln Park is obligated to purchase, up to $15.0 million of shares of the Company’s common stock. Sales of such shares by the Company, if any, are subject to certain limitations, and may occur from time to time, at the Company’s sole discretion through December 1, 2026.
At the Company’s sole discretion, on any business day selected by the Company on which the closing sale price of the Company’s common stock is not below $0.50 per share, the Company may direct Lincoln Park to purchase up to 30,000 shares of the Company’s common stock (or up to 35,000 and 40,000 shares if the closing sale price of the Company’s common stock on the day on which the Company initiates a purchase is not below $5.00 or $7.50, respectively, subject to customary adjustments for stock splits and similar transactions) at a purchase price equal to the lower of (i) the lowest sale price of the Company’s common stock on the business day on which the Company initiates the purchase and (ii) the average of the three lowest closing sale prices of the Company’s common stock during the 10-business day period immediately preceding the business day on which the Company initiates the purchase. However, Lincoln Park’s maximum commitment in any single purchase may not exceed $500,000. In addition, the Company may also direct Lincoln Park to purchase other amounts of common stock as accelerated purchases and as additional accelerated purchases, subject to limits specified in the purchase agreement, at a purchase price per share calculated as specified in the purchase agreement, but in no case lower than the minimum price per share the Company stipulates in its notice to Lincoln Park initiating these purchases.
The Company may not sell shares to Lincoln Park under the purchase agreement if it would result in Lincoln Park beneficially owning more than 4.99% of the Company’s then outstanding shares of common stock, which limitation is referred to as the beneficial ownership cap. Lincoln Park, upon written notice to the Company, may increase the beneficial ownership cap to up to 9.99%. Any increase in the beneficial ownership cap will not be effective until the 61st day after such written notice is delivered to the Company.
At the Company's 2026 annual meeting of stockholders in June 2026, the Company received stockholder approval to issue shares of common stock under the purchase agreement to Lincoln Park in excess of the Exchange Cap (as described below), thereby eliminating the Exchange Cap limitation. The Exchange Cap was a limitation imposed under applicable Nasdaq rules on the number of shares that the Company could issue and sell to Lincoln Park under the purchase agreement, unless the average price of all applicable sales of the Company's common stock to Lincoln Park under the purchase agreement equaled or exceeded $3.59 per share.
During the six months ended June 30, 2026 and 2025, the Company sold 150,000 and 330,000 shares of common stock, respectively, under this agreement for net proceeds of approximately $0.3 million and $0.9 million, respectively.
During the three months ended June 30, 2026, the Company wrote off approximately $0.2 million of previously deferred offering costs related to the Lincoln Park purchase agreement, which is reflected in selling, general and administrative expense in the condensed consolidated statements of operations for the three and six months ended June 30, 2026. The write-off resulted from a reduction in the Company's estimate of the total proceeds expected to be raised under the Lincoln Park purchase agreement, based on management's assessment of the amount that could reasonably be expected to be sold under the agreement through December 1, 2026.
March 2023 ATM Sales Agreement
In March 2023, the Company entered into a sales agreement with Stifel, Nicolaus & Company, Incorporated, or Stifel, and Cantor Fitzgerald & Co., or Cantor, to sell shares of its common stock from time to time through an "at-the-market," or ATM, equity offering program under which Stifel and Cantor act as the Company's agent. The Company agreed to pay a commission equal to 3% of the gross proceeds of any common stock sold under the agreement or such lower amount as the Company and Stifel and Cantor agree, plus certain legal expenses. In April 2024, the Company and Cantor mutually agreed to terminate the sales agreement with respect to Cantor. The Company sold no shares of common stock under this agreement during either of the six months ended June 30, 2026 or 2025.
Common Stock Warrants
The warrants outstanding as of June 30, 2026, are exercisable into 1,940,371 shares of common stock which shares had a fair value of $2.11 per share, based on the closing market price of the Company's common stock on June 30, 2026. The aggregate intrinsic value of warrants outstanding as of June 30, 2026, is calculated as the difference between the exercise price of the warrants and the closing market price of the Company's common stock on that date. The intrinsic value of warrants outstanding as of June 30, 2026, was zero. The Company has performed an assessment of all warrants issued and determined that the Company's warrants are equity-classified.
A summary of common stock warrants outstanding as of June 30, 2026 and December 31, 2025 is presented below:
Quantity of Warrants Outstanding as of
DescriptionJune 30, 2026December 31, 2025Exercise PriceExpiration Date
Initial Royalty Warrant (1)*
422,804 422,804 $4.10 12/22/2028
September 2023 Warrants (2)*
845,225 845,225 $9.11 3/1/2029
October 2016 Warrants (3)
542 542 $120.00 10/4/2026
Regulation A Offering Investor Warrants (4)
671,800 — $4.00 
(4)
Total Warrants Outstanding1,940,371 1,268,571 
1) Refers to a warrant issued in connection with entering into the royalty interest financing agreement with UiE.

2) Refers to the warrants issued in connection with a registered direct offering the Company completed in September 2023.

3) Refers to a warrant issued in October 2016 to a former financial advisor.

4) Refers to warrants issued to investors in the Regulation A Offering. Such warrants have expiration dates ranging from 1/27/29 to 6/12/29.

* The warrant includes certain rights in favor of the holder upon a "fundamental transaction" as described in the warrant, including the right of the holder to receive from the Company or the successor entity an amount of cash equal to the Black-Scholes value (as described in the warrants) of the unexercised portion of the warrant on the date of the consummation of such fundamental transaction.
Series A Convertible Preferred Stock
On January 23, 2026, the Company filed a certificate of designation with the Delaware Secretary of State pursuant to which 4,999,620 shares of the Company’s preferred stock, $0.01 par value per share, was designated as Series A Convertible Preferred Stock (the “Series A Preferred Stock”).
The Series A Preferred Stock ranks, as to rights upon liquidation, dissolution, or winding up, senior to the Company’s common stock. Each share of the Series A Preferred Stock has a stated value and liquidation preference of $5.00, in each case, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events affecting the Series A Preferred Stock. Except as required by law, the Series A Preferred Stock has no voting rights. The Series A Preferred Stock is convertible at the holder's option into shares of the Company’s common stock at a conversion price of $2.50 per share, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events affecting the Series A Preferred Stock. The Company has the right to require all or any portion of the Series A Preferred Stock to convert into shares of the Company’s common stock: (a) in the event of a change in control, (b) if the closing price of the Company’s common stock is at or above $4.50 per share, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events, for any 10 trading days out of any 30 consecutive trading day period, or (c) if the Company consummates a firm commitment public offering of shares of the Company’s common stock resulting in gross proceeds of at least $15.0 million at an offering price per share equal to or greater than $4.50, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events. Commencing on January 27, 2029, the Company may redeem the outstanding shares of Series A Preferred Stock at the lesser of (i) the stated value per share plus a non-compounded rate of return calculated at 8% per annum, and (ii) 200% of the stated value per share. Notwithstanding the conversion rights described above, to the extent prohibited by Nasdaq listing rules, the Company will not issue shares of its common stock upon conversion of shares of Series A Preferred Stock if such issuance will result in a change of control of the Company, unless the Company obtains stockholder approval of such issuance.
The Company evaluated the terms of the Series A Preferred Stock, and in accordance with the guidance of ASC 480, Distinguishing Liabilities from Equity, the Series A Preferred Stock is classified as permanent equity in the accompanying condensed consolidated balance sheets.
Regulation A Offering
On January 27, 2026, the Company completed the initial closing of its Regulation A Offering of up to 4,854,000 units (each, an “Investor Unit” and collectively the “Investor Units”), each consisting of one share of Series A Preferred Stock and two warrants, each to purchase one share of the Company’s common stock (“Investor Warrants”), with each Investor Unit being offered at an offering price of $5.00 (the “Regulation A Offering”). The closing price of the Company’s common stock on January 26, 2026, was $1.90, and because the Initial Conversion Price exceeded the sum of that closing price plus $0.125, the limitations under Nasdaq Listing Rule 5635(d) that
could have applied to the conversion of the Series A Preferred Stock and to the exercise of the Investor Warrants issued in the Regulation A Offering will not apply to any of the shares of Series A Preferred Stock or the Investor Warrants that are part of the up to 4,854,000 Investors Units that may be issued in the Regulation A offering.
The Regulation A Offering is being conducted pursuant to the Company’s offering statement on Form 1-A (File No. 024-12688), as amended (the “Offering Statement”), which was most recently qualified by the SEC on April 1, 2026, and the offering circular, dated January 6, 2026, and the offering circular supplement dated March 26, 2026, which form a part thereof (the “Offering Circular”). The Regulation A Offering is being conducted on a “best efforts” basis pursuant to a selling agency agreement, dated January 5, 2026 (the “Selling Agency Agreement”), between the Company and Digital Offering, LLC (“Digital Offering”), acting as the lead selling agent for the Regulation A Offering. Digital Offering is not required to sell any specific number or dollar amount of Investor Units. The Company will pay to Digital Offering a placement fee equal to 7.25% of the offering price per Investor Unit sold in the Regulation A Offering. The Company will also issue Agent Unit Warrants (as defined below) to purchase that number of Agent Units (as defined below) equal to 3% of the total number of Investor Units sold in the Regulation A Offering. In addition, the Company paid Digital Offering a $25,000 consulting fee and reimbursed or will reimburse Digital Offering for up to $85,000 of its reasonable, out-of-pocket, and documented fees and expenses incurred in connection with the Regulation A Offering.
The Investor Warrants are exercisable at any time after issuance through the 36-month anniversary of their date of issuance at an exercise price of $4.00 per share, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events. Notwithstanding the foregoing, there are certain limitations on the exercise of the Investor Warrants to the extent a holder (together with its affiliates) would own more than 4.99% (or 9.99% if elected by the warrant holder) of the Company’s common stock outstanding immediately after exercise.
The Regulation A Offering will terminate at the earliest of (i) the date on which the maximum offering amount of Investor Units has been sold, (ii) January 5, 2027 (one year after the date on which the Offering Statement was initially qualified by the SEC) and (iii) the date on which the Company determines to terminate the Regulation A Offering, which the Company may do in its sole discretion at any time and for any reason or no reason.
The Offering Circular also relates to 145,620 warrants (the “Agent Unit Warrants”) to purchase up to 145,620 units (the “Agent Units”) issuable to the selling agent(s) for the Regulation A offering, each Agent Unit consisting of one share of Series A Preferred Stock and two warrants, each to purchase one share of the Company’s common stock (the "Agent Common Warrants").
The exercise price per Agent Unit Warrant is $6.25, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events. The Agent Unit Warrants will expire on January 7, 2031, which is the five-year anniversary of the date of commencement of sales in the Regulation A Offering.
The exercise price per Agent Common Warrant is $4.00 per share, subject to customary adjustments in the event of stock dividends, stock splits, reorganizations or similar events. The terms of the Agent Common Warrant are substantially similar to the terms of the Investor Warrants, except that they expire on January 7, 2031.
During the six months ended June 30, 2026, the Company issued an aggregate of 335,900 Investor Units consisting of 335,900 shares of Series A Preferred Stock and Investor Warrants to purchase up to 671,800 shares of the Company’s common stock, for gross proceeds of approximately $1.7 million, and Agent Unit Warrants to purchase up to 10,075 Agent Units. The Company incurred total issuance costs of approximately $0.1 million including legal fees and placement fees directly related to the issuance that are recognized as a reduction in equity, resulting in net proceeds of approximately $1.5 million. The Investor Warrants were recognized in additional paid-in-capital as they met the criteria for equity classification.
During the six months ended June 30, 2026, the Company issued 520,000 shares of its common stock upon the conversion of 260,000 shares of Series A Preferred Stock in accordance with the terms of the Series A Preferred Stock. No gain, loss, or deemed dividend was recognized in connection with these conversions. As of June 30, 2026, 75,900 shares of Series A Preferred Stock remain outstanding. During the three months ended June 30, 2026, the Company wrote off approximately $0.1 million of previously deferred offering costs related to the Regulation A Offering, which is reflected in selling, general and administrative expense in the condensed consolidated statements of operations for the three and six months ended June 30, 2026. The write-off resulted from a reduction in the Company's estimate of the total proceeds expected to be raised under the Regulation A Offering, based on management's assessment of the number of Investor Units that could reasonably be expected to be sold prior to the scheduled termination of the Regulation A Offering on January 5, 2027.
Summary of Agent Unit Warrant Activity
A summary of Agent Unit Warrants outstanding during the six months ended June 30, 2026 is presented below:
Agent Unit Warrants
Number of Shares Underlying WarrantsWeighted Average Exercise PriceWeighted Average Remaining Life in YearsIntrinsic Value
Outstanding December 31, 2025,
— $— $— 
Agent Unit Warrants Issued in connection with Regulation A Offering
10,075 6.25 4.52
Exercised— — 
Forfeited or expired— — 
Outstanding and exercisable June 30, 2026
10,075 $6.25 4.52$—