Stockholders' Equity

12 Months Ended

Dec. 31, 2021

Stockholders' Equity

Stockholders' Equity

8.   Stockholders’ Equity

Preferred Stock

Under the Company’s amended and restated certificate of incorporation, the Company has 5,000,000 shares of preferred stock authorized for issuance, with a $0.001 par value per share. Preferred stock may be issued from time to time in one or more series, each series to have such terms as stated or expressed in the resolutions providing for the issue of such series adopted by the board of directors of the Company. Preferred stock which may be redeemed, purchased or acquired by the Company may be reissued except as otherwise provided by law. As of December 31, 2021, the Company had 31,455 shares of Series X Preferred Stock outstanding. Each share of Series X Preferred Stock is convertible into 166.67 shares of common stock and therefore the number of shares of underlying common stock issuable upon conversion of the Series X Preferred Stock is 5,242,501. Refer to Note 1 – “Organization and Operations” regarding the Company’s issuance of Series X Preferred Stock in January 2021 and February 2021.

Outstanding Warrants

The following table presents information about warrants that are issued and outstanding at December 31, 2021:

Year Issued	Equity Instrument	Warrants Outstanding	Exercise Price		Date of Expiration
2015	Common Stock	204	$	732.72	3/30/2022
2018	Common Stock	699,962	$	72.00	6/21/2023
2019	Common Stock	331,858	$	37.50	2/7/2024
2021	Common Stock	498,356	$	2.10	12/14/2030
Total		1,530,380
Weighted average exercise price			$	41.84
Weighted average life in years					4.05

Common Stock

As of December 31, 2021, the Company had 150,000,000 shares of common stock authorized for issuance, $0.001 par value per share, with 13,016,955 shares issued and outstanding.  The voting, dividend and liquidation rights of holders of common stock are subject to and qualified by the rights, powers and preferences of the holders of any outstanding preferred stock.

Reserved for Future Issuance

The Company has reserved for future issuance the following shares of common stock:

	December 31,	December 31,
	2021	2020
Series X Preferred Stock	5,242,501	—
Warrants for the purchase of common stock	1,530,380	1,032,291
Options outstanding to purchase common stock	1,346,733	227,846
Options available for future issuance to purchase common stock	1,633,736	322,695
Shares reserved for the employee stock purchase plan	30,904	24,825
Total	9,784,254	1,607,657

As of December 31, 2021, the Company also had 31,455 shares of Series X Preferred Stock outstanding. Each share of Series X Preferred Stock outstanding is convertible into 166.67 shares of the Company’s common stock, subject to certain beneficial ownership limitations at the holder’s option. See Note 1 – “Organization and Operations” for additional detail.