Stockholders’ Equity

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Stockholders’ Equity

Stockholders’ Equity

Shelf Registration Statement

In December 2019, the Company filed the 2019 Shelf Registration Statement on Form S-3, which became effective in January 2020. The 2019 Shelf Registration Statement, which expires in January 2023, permits: (i) the offering, issuance and sale by the Company of up to a maximum aggregate offering price of $200.0 million of common stock, preferred stock, debt securities and warrants in one or more offerings and in any combination; and (ii) the offering, issuance and sale by the Company of up to a maximum aggregate offering price of $60.0 million of the Company's common stock that may be issued and sold in “at-the-market” sales under the ATM Program. The $60.0 million of common stock that may be issued and sold under the ATM Program is included in the $200.0 million of securities that may be issued and sold under the 2019 Shelf Registration Statement. As of December 31, 2021, the Company has $132.6 million of common stock remaining that can be sold under the 2019 Shelf Registration Statement, of which $57.0 million may be sold under the ATM Program.

Shares Sold Under the ATM Program

During the year ended December 31, 2021, the Company sold no shares of common stock pursuant to the ATM Program. During the year ended December 31, 2020, the Company sold 561,848 shares of common stock pursuant to the ATM Program for net proceeds of $2.9 million.

March 2021 Offering

In March 2021, pursuant to the 2019 Shelf Registration Statement, the Company completed an underwritten public offering of its common stock, which resulted in the issuance and sale of an aggregate of 18,400,000 shares of common stock at a public offering price of $3.50 per share, generating net proceeds of $60.2 million, after deducting underwriting discounts and commissions and other offering costs.