Net Loss per Share

6 Months Ended

Jun. 30, 2020

10. Net Loss per Share

Basic and diluted net loss per share was calculated as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2020			2019			2020			2019
Numerator:
Net loss	$	(4,390	)	$	(7,172	)	$	(11,138	)	$	(14,385	)

Denominator:
Weighted average common shares outstanding—basic and diluted.		31,221,139			26,453,428			29,515,749			20,666,988
Weighted average pre-funded warrants to purchase common stock.		-			1,072,637			-			539,281
Total		31,221,139			27,526,065			29,515,749			21,206,269

Net loss per share —basic and diluted	$	(0.14	)	$	(0.26	)	$	(0.38	)	$	(0.68	)

The Company’s potential dilutive securities, which include stock options and warrants, have been excluded from the computation of diluted net loss per share whenever the effect of including them would be to reduce the net loss per share. In periods where there is a net loss, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share is the same. The following potential shares of common stock, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:

	Six Months Ended June 30,
	2020		2019
Warrants to purchase common stock		12,935,323		12,935,323
Stock options to purchase common stock		4,689,952		3,877,468
Restricted stock units to purchase common stock		10,000		50,000
Total		17,635,275		16,862,791