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Stockholders' Equity | 6 Months Ended
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Jun. 30, 2025
Equity [Abstract] |
Stockholders' Equity | Stockholders' Equity Common Stock Shelf Registration Statement On November 17, 2023, the Company filed a registration statement on Form S-3, as amended (the 2023 Shelf Registration Statement), covering the offering, from time to time, of up to $150.0 million of the Company's common stock, preferred stock, debt securities, warrants and units. The 2023 Shelf Registration Statement became effective on November 29, 2023, and $129.8 million remain available for sale as of June 30, 2025. At The Market Sales Agreement On September 15, 2022, the Company entered into a sales agreement, as amended on November 17, 2023 (the Sales Agreement) with TD Securities (USA) LLC (TD Securities), as sales agent, pursuant to which the Company may offer and sell, from time to time, shares of the Company's common stock having an aggregate offering price of up to $50.0 million. The Company is not obligated to sell any shares of the Company's common stock in the offering. As of June 30, 2025, the Company has not sold any shares of its common stock pursuant to the Sales Agreement. 2025 Public Offering On May 8, 2025, the Company entered into an underwriting agreement (the Underwriting Agreement) with Canaccord Genuity LLC (the Underwriter) relating to the issuance and sale of an aggregate of 3,852,500 shares of its common stock, including 502,500 shares of the Company's common stock issued and sold pursuant to the exercise in full of the Underwriters’ option to purchase additional shares, to the Underwriter at a price to the public of $5.25 per share (the 2025 Public Offering). The 2025 Public Offering closed on May 9, 2025. The net proceeds to the Company from the 2025 Public Offering were approximately $18.6 million after deducting $1.6 million of the underwriting discounts and commissions and other offering expenses payable by the Company. Outstanding Warrants The following equity classified warrants to purchase common stock of the Company were outstanding and exercisable as of June 30, 2025:
| Shares |  | Weighted-Average Exercise Price |  | Issuance date |  | Expiration date
Common stock warrants | 124,848 |  | $ | 1.84 |  |  | January 19, 2016 |  | January 19, 2026
Common stock warrants | 34,416 |  | $ | 1.84 |  |  | March 31, 2016 |  | March 31, 2026
Common stock warrants | 131 |  | $ | 1.84 |  |  | April 1, 2016 |  | April 1, 2026
Common stock warrants | 20,944 |  | $ | 14.32 |  |  | December 7, 2018 |  | December 7, 2025
Common stock warrants | 804,951 |  | $ | 0.001 |  |  | June 22, 2021 |  | None
Common stock warrants | 400,000 |  | $ | 5.27 |  |  | April 25, 2025 |  | April 25, 2035
| 1,385,290 |  |  |  |  |  |
In connection with the Perceptive Term Loan Facility, the Company may issue warrants for the purchase of up to an additional 750,000 shares of the Company’s common stock if and when the Company satisfies certain conditions and chooses to draw additional debt tranches during the respective draw periods. The Company issued a total of 107,969 shares of common stock upon the cashless exercise of certain warrants during the three and six months ended June 30, 2025. No warrants to purchase common stock of the Company were exercised during the three and six months ended June 30, 2024.

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