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SUBSEQUENT EVENTS
 12 Months Ended
Dec. 31, 2022
Subsequent Events [Abstract]  
SUBSEQUENT EVENTS

12. SUBSEQUENT EVENTS

Public Offering

On January 10, 2023, we completed an underwritten public offering of 68,007,741 shares of our common stock and a pre-funded warrant to purchase 25,000,000 shares of our common stock, or the 2023 pre-funded warrant. The net cash proceeds from this offering are approximately $213,300,000, after deducting the underwriting discount and other offering expenses paid by us, and excludes any future proceeds from the exercise of the 2023 pre-funded warrant, which has not been exercised.

Warrant Exercises

From January 1, 2023 through March 9, 2023, we have received $46,716,000 in cash proceeds from the exercise of the 2020 purchase warrants, representing 35,935,577 shares of our common stock.

From January 1, 2023 through March 9, 2023, we have received $13,119,000 in cash proceeds from the exercise of the 2022 purchase warrants, representing 9,047,617 shares of our common stock.