Stockholders' Equity

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Stockholders' Equity

Stockholders' Equity

(a) Authorized Stock

The Company’s amended and restated certificate of incorporation, authorizes the Company to issue 115,000,000 shares of common and preferred stock, consisting of 100,000,000 shares of common stock with $0.001 par value and 15,000,000 shares of preferred stock with $0.001 par value. The Company has reserved common shares for issuance upon the exercise of the authorized and issued common stock options and warrants.

(b)    Warrants

Warrants consist of the following as of December 31, 2022:

Warrant Expiration Date	Number of shares	Exercise price per share
Pre-funded - no expiration	12,110,710	$0.001

During the year ended December 31, 2022, 1,633,794 of pre-funded warrants were exercised into 1,633,526 shares of common stock and 163,915 warrants expired. In the first quarter of 2023, 9,424,504 pre-funded warrants were exercised into 9,423,565 shares of common stock.