Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of Potentially Dilutive Securities not included in the Calculation of Diluted Net Loss per Share

The following table presents the weighted-average number of common share equivalents, calculated using the treasury stock method, not included in the calculation of diluted net loss per share due to the anti-dilutive effect of the securities:

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Common stock options	2,371,908	1,766,047	2,347,335	1,646,198
Common stock warrants	10,417,753	11,488,628	10,710,055	11,442,505
Total	12,789,661	13,254,675	13,057,390	13,088,703