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Common Stock and Warrants
 12 Months Ended
Dec. 31, 2023
Preferred Stock Common Stock And Warrants [Abstract]  
Common Stock and Warrants
14.
Common Stock and Warrants

Common Stock Outstanding

As of December 31, 2023, there were 129,530,228 shares of our common stock outstanding.

We entered into an at-the-market Sales Agreement with Cowen and Company, LLC (“Cowen”) on August 6, 2020 and an amendment to such agreement on August 3, 2023 (the sales agreement as amended, the “ATM Agreement”). Under the ATM Agreement, we may offer and sell from time to time, at our sole discretion, shares of our common stock having an aggregate offering price of up to $120.0 million through Cowen as our sales agent. We agreed to pay Cowen a commission of up to 3% of the gross sales proceeds of any common stock sold through Cowen under the ATM Agreement. As of December 31, 2023, we had approximately $120.0 million remaining under the ATM Agreement.

Warrants

During the year ended December 31, 2022, all of the 1,882,600 outstanding warrants as of December 31, 2021 were exercised or expired, resulting in cash proceeds totaling $8.5 million. For the year ended December 31, 2022, we recognized

the decrease in the estimated fair value of warrant liability of $1.8 million as income in other income (expense) in our consolidated statements of operations.