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Reserved for Future Issuance | 6 Months Ended
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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.

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- Definition The entire disclosure for common stock reserved for future issuance. + References No definition available. + Details
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