Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

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, as well as certain shares that are contingently issuable, 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,
	2021	2020	2021	2020
Common stock options	2,332,008	2,112,690	2,551,743	2,145,789
Common stock warrants	7,605,764	9,623,913	7,823,176	9,658,342
Unvested restricted stock units	605,878	311,269	566,318	272,291
Total	10,543,650	12,047,872	10,941,237	12,076,422