Stockholders' Equity	6 Months Ended
Jun. 30, 2021
Stockholders' Equity
Stockholders' Equity	7. Stockholders’ Equity Issuances of Common Stock - On February 16, 2021, the Company entered into a placement agency agreement with Roth Capital Partners, LLC relating to a public offering of 1,710,600 shares of its common stock for gross proceeds of approximately $13.0 million under the Company’s shelf registration statement on Form S-3 (File No. 333-231537) (the “2019 Shelf Registration Statement”), which was declared effective by the SEC on June 5, 2019 (the “2021 Public Offering”). In addition, on February 16, 2021, the Company entered into a securities purchase agreement with certain institutional investors pursuant to which the Company agreed to sell an aggregate of 1,650,000 shares of its common stock in the 2021 Public Offering to such investors. The 2021 Public Offering closed on February 18, 2021. The net proceeds from the offerings, after deducting the placement agent’s fees and expenses and the Company’s offering expenses, were approximately $12.2 million. During the six months ended June 30, 2021, the Company issued an aggregate of 428,907 shares of its common stock pursuant to the exercise of warrants at a weighted average exercise price of approximately $9.71 per share. The net proceeds to the Company from the exercise of the warrants were approximately $4.2 million. At-The-Market Offering Agreement - On July 13, 2020, the Company entered into an At-The-Market Offering Agreement (the “Offering Agreement”) with H. C. Wainwright & Co., LLC (“Wainwright”), as sales agent and/or principal, pursuant to which the Company may offer and sell, from time to time, through or to Wainwright, shares of the Company’s common stock. Sales of shares of common stock under the Offering Agreement will be made pursuant to the 2019 Shelf Registration Statement and a related prospectus supplement filed with the SEC on July 14, 2020, for an aggregate offering price of up to $7.0 million. Under the Offering Agreement, Wainwright may sell shares by any method deemed to be an “at the market” offering as defined in Rule 415 under the Securities Act of 1933, as amended. The Company will pay Wainwright a commission of 3% of the aggregate gross proceeds from each sale of shares under the Offering Agreement and has agreed to provide Wainwright with customary indemnification and contribution rights. The Company has also agreed to reimburse Wainwright for certain specified expenses. During the six months ended June 30, 2021, the Company offered and sold 278,800 shares of its common stock under the Offering Agreement for net proceeds of approximately $2.3 million. Stockholders’ Equity totaled $29.8 million as of June 30, 2021 compared to $15.1 million as of December 31, 2020. There were 6,960,164 shares of common stock issued and outstanding as of June 30, 2021. There were no shares of preferred stock issued and outstanding as of June 30, 2021.

Stockholders' Equity

6 Months Ended

Jun. 30, 2021

7. Stockholders’ Equity

Issuances of Common Stock - On February 16, 2021, the Company entered into a placement agency agreement with Roth Capital Partners, LLC relating to a public offering of 1,710,600 shares of its common stock for gross proceeds of approximately $13.0 million under the Company’s shelf registration statement on Form S-3 (File No. 333-231537) (the “2019 Shelf Registration Statement”), which was declared effective by the SEC on June 5, 2019 (the “2021 Public Offering”). In addition, on February 16, 2021, the Company entered into a securities purchase agreement with certain institutional investors pursuant to which the Company agreed to sell an aggregate of 1,650,000 shares of its common stock in the 2021 Public Offering to such investors. The 2021 Public Offering closed on February 18, 2021. The net proceeds from the offerings, after deducting the placement agent’s fees and expenses and the Company’s offering expenses, were approximately $12.2 million.

During the six months ended June 30, 2021, the Company issued an aggregate of 428,907 shares of its common stock pursuant to the exercise of warrants at a weighted average exercise price of approximately $9.71 per share. The net proceeds to the Company from the exercise of the warrants were approximately $4.2 million.

At-The-Market Offering Agreement - On July 13, 2020, the Company entered into an At-The-Market Offering Agreement (the “Offering Agreement”) with H. C. Wainwright & Co., LLC (“Wainwright”), as sales agent and/or principal, pursuant to which the Company may offer and sell, from time to time, through or to Wainwright, shares of the Company’s common stock. Sales of shares of common stock under the Offering Agreement will be made pursuant to the 2019 Shelf Registration Statement and a related prospectus supplement filed with the SEC on July 14, 2020, for an aggregate offering price of up to $7.0 million. Under the Offering Agreement, Wainwright may sell shares by any method deemed to be an “at the market” offering as defined in Rule 415 under the Securities Act of 1933, as amended. The Company will pay Wainwright a commission of 3% of the aggregate gross proceeds from each sale of shares under the Offering Agreement and has agreed to provide Wainwright with customary indemnification and contribution rights. The Company has also agreed to reimburse Wainwright for certain specified expenses.

During the six months ended June 30, 2021, the Company offered and sold 278,800 shares of its common stock under the Offering Agreement for net proceeds of approximately $2.3 million.

Stockholders’ Equity totaled $29.8 million as of June 30, 2021 compared to $15.1 million as of December 31, 2020. There were 6,960,164 shares of common stock issued and outstanding as of June 30, 2021. There were no shares of preferred stock issued and outstanding as of June 30, 2021.