Stockholders' Equity	12 Months Ended
Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity	Note 10. Stockholders’ Equity Public Offering of Common Stock In January 2020, the Company issued and sold 16,866,667 shares of common stock, par value $0.001 per share, at $3.75 per share in an underwritten public offering. The total proceeds from this offering were approximately $62.7 million, net of the underwriting discount and other issuance costs. Sales Agreements On August 4, 2017, the Company entered into Amendment No. 3 to the Controlled Equity Offering ^SM Sales Agreement with Cantor Fitzgerald & Co. (as amended on August 4, 2017, the “Amended Cantor Agreement”). Under the Amended Cantor Agreement, Cantor also acted as the Company’s sales agent and receives compensation based on an aggregate of 2% of the gross proceeds on the sale price per share of its common stock. The issuance and sale of these shares by the Company pursuant to the Amended Cantor Agreement are deemed an “at-the-market” offering and are registered under the Securities Act of 1933, as amended. During the year ended December 31, 2020, 2.5 million shares of the Company’s common stock were sold under the Amended Cantor Agreement for net proceeds of $13.9 million, after which time the Amended Cantor Agreement was fully utilized and automatically terminated. On December 11, 2020, the Company entered into the Controlled Equity Offering ^SM Sales Agreement (the “Sales Agreement”) with Cantor Fitzgerald & Co. and Stifel, Nicolaus & Company, Incorporated (the “Sales Agents”), under which the Company may issue and sell from time to time up to $100.0 million of the Company’s common stock through or to the Sales Agents, as sales agent or principal. Under the Sales Agreement, each Sales Agent receives compensation based on an aggregate of 2% of the gross proceeds on the sale price per share of its common stock. The issuance and sale of these shares by the Company pursuant to the Sales Agreement are deemed an “at-the-market” offering and are registered under the Securities Act of 1933, as amended. During the year ended December 31, 2020, no shares of the Company’s common stock were sold under the Sales Agreement.

Stockholders' Equity

12 Months Ended

Dec. 31, 2020

Note 10. Stockholders’ Equity

Public Offering of Common Stock

In January 2020, the Company issued and sold 16,866,667 shares of common stock, par value $0.001 per share, at $3.75 per share in an underwritten public offering. The total proceeds from this offering were approximately $62.7 million, net of the underwriting discount and other issuance costs.

Sales Agreements

On August 4, 2017, the Company entered into Amendment No. 3 to the Controlled Equity Offering ^SM Sales Agreement with Cantor Fitzgerald & Co. (as amended on August 4, 2017, the “Amended Cantor Agreement”). Under the Amended Cantor Agreement, Cantor also acted as the Company’s sales agent and receives compensation based on an aggregate of 2% of the gross proceeds on the sale price per share of its common stock. The issuance and sale of these shares by the Company pursuant to the Amended Cantor Agreement are deemed an “at-the-market” offering and are registered under the Securities Act of 1933, as amended. During the year ended December 31, 2020, 2.5 million shares of the Company’s common stock were sold under the Amended Cantor Agreement for net proceeds of $13.9 million, after which time the Amended Cantor Agreement was fully utilized and automatically terminated.

On December 11, 2020, the Company entered into the Controlled Equity Offering ^SM Sales Agreement (the “Sales Agreement”) with Cantor Fitzgerald & Co. and Stifel, Nicolaus & Company, Incorporated (the “Sales Agents”), under which the Company may issue and sell from time to time up to $100.0 million of the Company’s common stock through or to the Sales Agents, as sales agent or principal. Under the Sales Agreement, each Sales Agent receives compensation based on an aggregate of 2% of the gross proceeds on the sale price per share of its common stock. The issuance and sale of these shares by the Company pursuant to the Sales Agreement are deemed an “at-the-market” offering and are registered under the Securities Act of 1933, as amended. During the year ended December 31, 2020, no shares of the Company’s common stock were sold under the Sales Agreement.