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Common Stock | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Common Stock | 8. Common Stock ATM Offering B. Riley Securities, Inc. acts as sales agent for the Company’s ATM program, which allows the Company to potentially sell up to $50.0 million of the Company’s common stock using a shelf registration statement on Form S-3 filed on August 5, 2021. On March 31, 2023, the date the Company filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2022, the Company became subject to the offering limits in General Instruction I.B.6 of Form S-3. As a result, the Company filed a prospectus supplement to the prospectus relating to the registration of offerings under the program that reduced the amount the Company may sell to aggregate proceeds of up to $15 million. For the year ended December 31, 2023, the Company has received proceeds of approximately $4.7 million net of fees from the sale of common stock pursuant to the program. As of December 31, 2023, the Company has received proceeds of approximately $12.2 million net of fees from the sales of 498 thousand shares of common stock since the inception of the program. Registered Direct Offering On September 12, 2022, the Company entered in a Securities Purchase Agreement (the “Purchase Agreement”) with certain purchasers to issue and sell to the purchasers an aggregate of 68,934 shares of the Company’s common stock (the “Shares”) each of which was coupled with a warrant to purchase one share of common stock (the “Warrants”) at an aggregate offering price of $85.80 per share and warrant, such offering is hereinafter referred to as the “registered direct offering”. Each warrant has an exercise price of $104.40 per share of common stock, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions and is exercisable from the date of the issuance through September 14, 2027. The Company delivered 46,975 Shares and Warrants on or about September 14, 2022. After September 30, 2022, the Company issued an additional 13,666 Shares and related Warrants as a result of delayed closings. On November 10, 2022, the Company reached an agreement with the sole remaining delayed basis investor in the registered direct offering to reduce the purchaser’s subscription by $0.7 million and, accordingly, reduce the Company’s obligation to issue securities. Following the final closing, the Company had received from the registered direct offering total aggregate proceeds of $5.2 million in exchange for the issuance of an aggregate of 60,641 Shares and Warrants to purchase 60,641 Shares. Private Offering On November 8, 2023, the Company entered into a Securities Purchase Agreement (the “2023 Purchase Agreement”) pursuant to which, among other things, the Company sold to certain purchasers an aggregate of 217,977 shares of our common stock, each of which was coupled with a warrant to purchase two shares of our common stock, at an aggregate offering price of $12.00 per share and warrant and received $2.3 million in proceeds, net of fees.

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