Basic loss per common share is computed by dividing the net loss allocable to common stockholders by the weighted-average number of shares of common stock or common stock equivalents outstanding. Diluted loss per common share is computed similar to basic loss per common share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock.

The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per share for the periods presented:

	Years Ended December 31,
	2021			2020
Numerator:
Net loss	$	(17,145,170	)	$	(20,870,218	)
Denominator:
Weighted-average shares outstanding-basic and diluted *		6,936,131			4,627,918
Net loss per share, basic and diluted	$	(2.47	)	$	(4.51	)

*Reflects the retrospective adjustment related to the reverse stock split completed on November 20, 2020.

The following common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive:

	Years Ended December 31,
	2021		2020
Options to purchase common stock		559,336		487,227
Series A Preferred		158,545		158,545
Common stock warrants		58,688		58,688
Unvested restricted stock units		31,177		12,214