Equity

9 Months Ended

Sep. 30, 2025

Equity [Abstract]

Equity

5.Equity

Series A-1 Preferred Stock

In April 2025, the Company entered into a Subscription Agreement (the “A-1 Agreement”), with an accredited investor, pursuant to which the Company sold 500 shares of Series A-1 Convertible Preferred Stock, par value of $0.001 per share (the “Series A-1 Preferred Stock”), at a price per share of $1,000 (the “Preferred Offering”) for an aggregate purchase price of $0.5 million. The Preferred Offering also relates to the offering of the shares of the Company's common stock (the "Common Stock") issuable upon the conversion of or otherwise pursuant to the terms of the Series A-1 Preferred Stock.

In connection therewith, the Company filed with the Secretary of State of the State of Delaware the Certificate of Designation of Series A-1 Convertible Preferred Stock of the Company, designating 1,000 shares of preferred stock as Series A-1 Preferred Stock.

Series A-1 Preferred Stock together with the aggregate accrued or accumulated and unpaid dividends thereon, is convertible, at any time at option of the holder, into shares of Common Stock at initial fixed “Conversion Price” of $2.76 per share, subject to customary anti-dilution provisions. Prior thereto, the holders of Series A-1 Preferred Stock are entitled to receive dividends at a rate of 10% per annum, payable in shares of Series A-1 Preferred Stock, if and when declared by the Board of Directors. In addition, to the extent any other dividends or distributions are declared for holders of the common stock, the holders of Series A-1 Preferred Stock have participation rights on an as-converted basis. The holders of Series A-1 Preferred Stock are entitled to vote, together as a single class, on any and all matters presented to the stockholders of the Company for their action on an as-converted basis, a number of votes equal

to the number of shares of common stock into which the shares of Series A-1 Preferred Stock are convertible under the terms of the Certificate of Designation.

Director Compensation

On April 13, 2025, the Board of Directors of the Company elected to receive compensation in the form of shares of common stock and stock options in lieu of cash for the then outstanding cumulative deferred board service fees for the first quarter of 2025, totaling $139 thousand. Accordingly, the Company issued 38,269 shares of common stock with an aggregate fair value of $112 and granted 10,904 fully vested stock options, with an exercise price of $2.92 per share and an aggregate grant date fair value of $27 thousand.

On July 3, 2025, certain members of the Board of Directors of the Company elected to receive compensation in equity rather than in cash for their second quarter board service fees. The total deferred board service fees amounted to $37 thousand. In exchange for these deferred fees, the Company issued 7,450 shares of common stock, each with a par value of $0.001.

Securities Purchase Agreement for Registered Direct Offering

In June 2025, the Company entered into a Securities Purchase Agreement with certain institutional investors, pursuant to which the Company agreed to sell (i) 338,725 shares of common stock at a purchase price of $3.36 per share and (ii) 271,674 pre-funded warrants to purchase common stock at a purchase price of $3.359 per warrant share, in a registered direct offering. In connection therewith, Company received net proceeds totaling $1.91 million after deduction of transaction related expenses. Subsequent thereto and through September 30, 2025, a total of 209,375 of the prefunded warrants were exercised at $0.001 per share, resulting in the issuance of 209,375 shares of common stock. Subsequent to September 30, 2025, an aggregate of 62,999 prefunded warrants were exercised cash less and resulting in the issuance of an additional 62,281 shares of common stock.

Series A-2 Preferred Stock

In June 2025, the Company entered into a subscription agreement with certain accredited investors, pursuant to which the Company sold, in a private placement, 850 shares of Series A-2 Convertible Preferred Stock, par value $0.001 per share, at a price of $1,000 per share, for aggregate gross proceeds of $0.85 million.

In connection therewith, the Company filed with the Secretary of State of the State of Delaware the Certificate of Designation of Series A-2 Convertible Preferred Stock of the Company, designating 1,000 shares of preferred stock as Series A-2 Preferred Stock.

Series A-2 Preferred Stock, together with the aggregate accrued or accumulated and unpaid dividends thereon, is convertible, at any time at the option of the holder, into shares of Common Stock at an initial fixed “Conversion Price” of $4.49 per share, subject to customary anti-dilution provisions. Prior thereto, the holders of Series A-2 Preferred Stock are entitled to receive dividends at a rate of 10% per annum, payable in shares of Series A-2 Preferred Stock, if and when declared by the Board of Directors. In addition, to the extent any other dividends or distributions are declared for holders of the Common Stock, the holders of Series A-2 Preferred Stock have participation rights on an as-converted basis. The holders of Series A-2 Preferred Stock are entitled to vote, together as a single class, on any and all matters presented to the stockholders of the Company for their action on an as-converted basis, a number of votes equal to the number of shares of Common Stock into which the shares of Series A-2 Preferred Stock are convertible under the terms of the Certificate of Designation.

Series A-1 and A-2 Preferred Stock Cumulative Dividends

Cumulative dividends on the Company’s Series A-1 and Series A-2 Convertible Preferred Stock accrue at 10% per annum and compound quarterly by increasing the liquidation preference. Undeclared cumulative dividends are not recorded as a liability. Because the Company reported a net loss for the periods presented, cumulative preferred dividends increased the net loss attributable to common stockholders in the earnings-per-share calculation. As of September 30, 2025, undeclared cumulative dividends totaled $39 thousand for Series A-1 and $23 thousand for Series A-2. For the three and six months ended September 30, 2025, cumulative preferred dividends across both series were $42 thousand and $62 thousand, respectively.