Reserved for Future Issuance

6 Months Ended

Jun. 30, 2021

Reserved for Future Issuance

Reserved for Future Issuance

8.    Reserved for Future Issuance

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

	June 30,	December 31,
	2021	2020
Warrants for the purchase of common stock	9,183,885	6,193,749
Options outstanding to purchase common stock	7,930,334	1,367,667
Options available for future issuance to purchase common stock	1,697,308	1,936,173
Shares reserved for the employee stock purchase plan	185,421	148,951
Total	18,996,948	9,646,540

As of June 30, 2021, the Company also had 32,545 shares of Series X Preferred Stock outstanding. Each share of Series X Preferred Stock outstanding is convertible into 1,000 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.