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Note 10 - Stockholders' Equity and Common Stock Warrants | 6 Months Ended
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Jun. 30, 2024
Notes to Financial Statements |
Equity [Text Block] | 10. Stockholders' Equity and Common Stock Warrants April 2024 Private Placement On April 1, 2024, pursuant to and in accordance with the terms of a securities purchase agreement with certain purchasers named therein, we completed the private placement of an aggregate of 2,083,262 common shares, 2,532,285 Series A Warrants and 449,023 Pre-Funded Warrants. The aggregate upfront gross proceeds from the 2024 Private Placement were approximately $50.0 million, before deducting approximately $3.6 million of offering fees and expenses. The Pre-Funded Warrants and Series A Warrants were classified as a component of stockholders’ equity within additional paid-in capital. The Pre-Funded Warrants and Series A Warrants are equity classified because they (i) are freestanding financial instruments that are legally detachable and separately exercisable from the equity instruments, (ii) are immediately exercisable, (iii) do not embody an obligation for the Company to repurchase its shares, (iv) permit the holders to receive a fixed number of shares of common stock upon exercise, (v) are indexed to the Company’s common stock and (vi) meet the equity classification criteria. Warrants As of June 30, 2024, the Company had the following warrants outstanding to acquire shares of its common stock:
|  | Outstanding |  |  | Range of exercise price per share |  | Expiration dates
Historical Diffusion common stock warrants |  |  | 57,965 |  |  | $26.27 | - | $375.14 |  | November 2024 through February 2026
Historical EIP common stock warrants |  |  | 43,618 |  |  |  | $19.81 |  |  | April 2028
Series A common stock warrants |  |  | 2,532,285 |  |  |  | $39.24 |  |  | The earlier of (i) April 1, 2027 and (ii) the date that is 180 days after the date the Exercise Conditions (as defined in the Series A Warrants) have been met
Pre-funded warrants issued in April 2024 Private Placement |  |  | 449,023 |  |  |  | $0.001 |  |  | None
|  |  | 3,082,891 |  |  |  |  |  |  |
February 2024 Pre-Funded Warrant Exercise On February 26, 2024, following the effectiveness of an amendment eliminating certain beneficial ownership limitations set forth therein, 499,995 previously outstanding pre-funded warrants to purchase common stock issued in connection with the closing of the Merger were exercised in full by the holder thereof pursuant to the cashless exercise provision of the pre-funded warrants. Upon exercise, 36 shares were withheld in lieu of a cash payment of the exercise price and the holder was issued 495,959 shares of common stock. "At-The-Market" Sales Agreement The Company is party to the 2022 Sales Agreement with BTIG. The 2022 Sales Agreement is an "at-the-market" sales agreement pursuant to which the Company may, from time to time and through BTIG as the Company’s agent, sell up to an aggregate of $20.0 million in shares of common stock by any permissible method deemed an “at-the-market offering” as defined in Rule 415(a)(4) under the Securities Act. As of the date of this Quarterly Report, however, the Company has not sold any shares pursuant to the 2022 Sales Agreement.

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