Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Diluted Net Loss Per Share Attributable to Common Stockholders

The common stock issuable upon the conversion or exercise of the following dilutive securities has been excluded from the diluted net loss per share calculation because their effect would have been anti-dilutive. Diluted net loss per share, therefore, does not differ from basic net loss per share for the periods presented.

	March 31,
	2020	2019
	(unaudited)
Warrants to purchase common stock	1,894,455	1,859,733
Stock options and restricted stock units outstanding	4,257,825	3,406,315
Total	6,152,280	5,266,048