STOCKHOLDERS' EQUITY	9 Months Ended
Sep. 30, 2021
Stockholders Equity Note [Abstract]
STOCKHOLDERS' EQUITY	5. STOCKHOLDERS’ EQUITY At Market Issuance Sales Agreement On September 4, 2020, we entered the At Market Issuance Sales Agreement with B. Riley Securities, Inc., or the 2020 Sales Agreement, pursuant to which we may elect to issue and sell shares of our common stock having an aggregate offering price of up to $100,000,000 in such quantities and on such minimum price terms as we set from time to time through B. Riley Securities, Inc., or B. Riley Securities, as our sales agent. We pay B. Riley Securities an aggregate commission rate equal to up to 3.0% of the gross proceeds of the sales price per share for common stock sold through B. Riley Securities under the 2020 Sales Agreement. For the three months ended March 31, 2021, we sold an aggregate of 7,948,505 shares of our common stock pursuant to the 2020 Sales Agreement, resulting in net cash proceeds to us of approximately $16,234,000, after deducting sales commissions and other offering expenses payable by us. No sales were made during the three months ended June 30, 2021 or September 30, 2021. Approximately $83,000,000 of our common stock remained available for issuance under the 2020 Sales Agreement as of September 30, 2021. The 2020 Sales Agreement will expire upon the earlier of: (a) the sale of all common stock subject to the 2020 Sales Agreement, or (b) September 4, 2023.

STOCKHOLDERS' EQUITY

9 Months Ended

Sep. 30, 2021

5. STOCKHOLDERS’ EQUITY

At Market Issuance Sales Agreement

On September 4, 2020, we entered the At Market Issuance Sales Agreement with B. Riley Securities, Inc., or the 2020 Sales Agreement, pursuant to which we may elect to issue and sell shares of our common stock having an aggregate offering price of up to $100,000,000 in such quantities and on such minimum price terms as we set from time to time through B. Riley Securities, Inc., or B. Riley Securities, as our sales agent. We pay B. Riley Securities an aggregate commission rate equal to up to 3.0% of the gross proceeds of the sales price per share for common stock sold through B. Riley Securities under the 2020 Sales Agreement. For the three months ended March 31, 2021, we sold an aggregate of 7,948,505 shares of our common stock pursuant to the 2020 Sales Agreement, resulting in net cash proceeds to us of approximately $16,234,000, after deducting sales commissions and other offering expenses payable by us. No sales were made during the three months ended June 30, 2021 or September 30, 2021. Approximately $83,000,000 of our common stock remained available for issuance under the 2020 Sales Agreement as of September 30, 2021. The 2020 Sales Agreement will expire upon the earlier of: (a) the sale of all common stock subject to the 2020 Sales Agreement, or (b) September 4, 2023.