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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2019
Stockholders' Equity |
Schedule of common Stock reserved for future issuance |
|  | December 31,
|  | 2019 |  | 2018
Warrants for the purchase of Common Stock |  | 6,193,749 |  | 4,202,449
Options outstanding to purchase Common Stock |  | 785,832 |  | 433,389
Options available for future issuance to purchase Common Stock |  | 525,484 |  | 877,917
Shares reserved for the employee stock purchase plan |  | 112,481 |  | 76,011
Total |  | 7,617,546 |  | 5,589,766

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