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Note 8 - Stockholders' Equity | 12 Months Ended
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Dec. 31, 2023
Notes to Financial Statements |
Equity [Text Block] |
(8) | Stockholders’ Equity
Warrants – Set forth below is a table of activity of warrants for common stock and the related weighted average exercise price per warrant.
|  | Number of |  |  | Weighted |
|  | Common Stock |  |  | Average |
|  | Warrants |  |  | Exercise Price |
Balance, December 31, 2022 |  |  | 2,424,724 |  |  | $ | 6.36 |
Warrants expired |  |  | (296,295 | ) |  |  | 6.75 |
Balance, December 31, 2023 |  |  | 2,128,429 |  |  | $ | 6.30 |
November 2023 Financing - On November 16, 2023, we sold 2,000,000 shares of our common stock in a registered direct offering (the Offering) at a price of $0.65 per share. The gross proceeds of the Offering were $1.3 million, with associated issuance costs of $312,000. June 2023 Financing - On June 21, 2023, we sold to certain existing investors and other institutional investors, as well as certain of our directors and officers, 1,133,141 shares of our common stock in a registered direct offering (the June 2023 Offering) at an offering price of $2.336 per share. Certain of our directors and executive officers purchased an aggregate of 203,337 of such shares. The gross proceeds of the June 2023 Offering were approximately $2.6 million, with associated issuance costs of approximately $194,000. At-the-Market (ATM) Offerings - On April 12, 2022, we entered into a sales agreement (Cantor Sales Agreement) with Cantor Fitzgerald & Co. (Cantor) as the sales agent, pursuant to which we may offer and sell, from time to time, through Cantor, shares of common stock having an aggregate offering price of up to $10.5 million (ATM Offering). Under the terms of the Cantor Sales Agreement, Cantor was paid a commission of 3% of the aggregate proceeds from the sale of shares and reimbursed certain legal fees. The prospectus supplement expired in conjunction with the expiration of the corresponding registration statement on October 20, 2023. On June 20, 2023, we agreed with Cantor to indefinitely suspend sales under the ATM Offering. On December 6, 2023, we entered into an At The Market Offering Agreement (the Sales Agreement) with H.C. Wainwright & Co., LLC (HCW). Under the Sales Agreement, we may offer and sell our common stock, from time to time having an aggregate offering price of up to $2.75 million during the term of the Sales Agreement through or to HCW as sales agent or principal. We have filed a prospectus supplement relating to the offer and sale of the shares pursuant to the Sales Agreement. The offering and sale of the shares will be made pursuant to the Company’s previously filed and effective Registration Statement on Form S-3 (File No. 333-275099), which was initially filed with the Securities and Exchange Commission (the “SEC”) on October 19, 2023 and declared effective on December 5, 2023. We have agreed to pay HCW a commission equal to 3% of the gross proceeds from the sales of shares and have agreed to provide HCW with customary indemnification and contribution rights. During the years ended December 31, 2023 and 2022, we sold an aggregate of 215,224 and 711,511 shares of common stock under the ATM Offerings at then-market prices for total gross proceeds of $441,000 and $1,803,000, with associated issuance costs of $179,000 and $256,000, respectively. December 2022 - On December 16, 2022, we sold to certain qualified institutional buyers and institutional accredited investors an aggregate of 2,122,017 shares of our common stock at an offering price of $1.68 per share in a private placement. Certain of the Company’s directors and executive officers purchased an aggregate of 499,997 of such shares. The net proceeds of the Private Placement were approximately $3.4 million, including associated issuance costs of $162,000.

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