Common Stock

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Common Stock

13. Common Stock

At-the-Market Sales Agreement

In April 2021, we entered into an “at-the-market” sales agreement (the “2021 Sales Agreement”), with Cantor Fitzgerald & Co. and SVB Leerink LLC, through which we may offer and sell shares of our common stock having an aggregate offering of up to $75.0 million through our sales agents, Cantor Fitzgerald & Co. and SVB Leerink LLC. We will pay the sales agents a commission of up to 3% of the gross proceeds of sales made through the 2021 Sales Agreement. As of March 31, 2022, we have $40.0 million remaining under the 2021 Sales Agreement, which is subject to the continued effectiveness of our shelf registration statement on Form S-3 (Registration No. 333-255099) that expires on April 7, 2024, or upon an effective replacement shelf registration statement.

Restricted Stock Awards (“RSAs”)

The following table summarizes RSA activity:

	RSAs Outstanding
	Number of RSAs (in thousands)			Weighted- Average Grant Date Fair Value Per Share
Balance—December 31, 2021		99		$	0.00034
Vested		(23	)		0.00034
Balance—March 31, 2022		76		$	0.00034

The fair value of RSAs vested during the three months ended March 31, 2022 and 2021 was $0.3 million and $0.4 million, respectively.