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Stockholders’ Deficit | 12 Months Ended
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Dec. 31, 2023
Stockholders' Equity Note [Abstract] |
Stockholders’ Deficit | Stockholders’ Deficit In August 2023, the Company entered into an At Market Issuance Sales Agreement (the "August 2023 Sales Agreement"), which allows it to issue and sell up to $500 million in gross proceeds of shares of its common stock, and terminated its then-existing At Market Issuance Sales agreement entered in June 2021 (the “June 2021 Sales Agreement”). During the year ended December 31, 2023, the Company sold 38.3 million shares of its common stock under its August 2023 Sales Agreement and 7.9 million shares of its common stock under its June 2021 Sales Agreement, resulting in net proceeds of approximately $321 million, of which $6.9 million was included in Prepaid expenses and other current assets as of December 31, 2023 and received in cash in January 2024. As of December 31, 2023, the remaining balance available under the August 2023 Sales Agreement was approximately $242 million. During the year ended December 31, 2022, the Company sold 2.2 million shares of its common stock resulting in net proceeds of approximately $179 million, under its June 2021 Sales Agreement. In August 2023, pursuant to the Securities Subscription Agreement with SK, the Company agreed to sell and issue to SK 6.5 million shares of the Company’s common stock at a price of $13.00 per share (the “Shares”) in a Private Placement for aggregate gross proceeds to the Company of approximately $84.5 million. The Company recognized the Shares at the settlement date fair value of $46.5 million (see Note 4 for additional discussion of the Securities Subscription Agreement with SK). The closing of the Private Placement occurred on August 10, 2023. In December 2022, the Company completed a public offering of 7,475,000 shares of its common stock, including 975,000 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $10.00 per share resulting in net proceeds, net of offering costs of $4.9 million, of approximately $70 million. The Company completed this public offering concurrent with the issuance of the 2027 Notes (see Note 10).

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