Net Loss per Share

6 Months Ended

Jun. 30, 2020

3. Net Loss per Share

Basic net loss per share is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of common shares outstanding for the period, without consideration for potentially dilutive securities. The Company has computed diluted net loss per common share after giving consideration to all potentially dilutive common shares, including options to purchase common stock, restricted stock units and warrants to purchase common stock, outstanding during the period determined using the treasury-stock and if-converted methods, except where the effect of including such securities would be antidilutive. Because the Company has reported net losses since inception, these potential common shares have been anti-dilutive and basic and diluted loss per share have been the same.

Basic and diluted net loss per share attributable to common stockholders was calculated as follows (in thousands, except share and per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2020			2019			2020			2019
Numerator:
Net loss	$	(6,976	)	$	(11,273	)	$	(14,561	)	$	(22,692	)
Net loss attributable to common stockholders	$	(6,976	)	$	(11,273	)	$	(14,561	)	$	(22,692	)
Denominator:
Weighted-average common shares—basic and diluted		26,878,962			20,903,298			25,808,043			20,859,251
Net loss per share attributable to common stockholders—basic and diluted	$	(0.26	)	$	(0.54	)	$	(0.56	)	$	(1.09	)

The following table sets forth the potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):

	Six Months Ended June 30,
	2020		2019
Warrants		9,040		9,040
Stock options		3,766,567		3,142,132
Restricted stock units		553,468		—
Total		4,329,075		3,151,172