Potentially Dilutive Securities (Tables)

3 Months Ended

Mar. 31, 2021

Potentially Dilutive Securities

Potentially Dilutive Securities Excluded From Computation of Diluted Net Loss Per Common Share

The following outstanding potentially dilutive securities have been excluded from the computations of diluted net loss per common share:

	As of March 31,
	2021		2020
Options to purchase common stock		4,224,111		3,420,930
Warrants to purchase common stock		51,238		66,239
Convertible debt		255,493		2,295,545
		4,530,842		5,782,714