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Stockholders' Equity (Tables)

12 Months Ended

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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