3. Net Loss per Share

Basic net loss per share is computed by dividing net loss attributable to common stockholders by the weighted average number of shares of common stock of the Company outstanding during the period. The Company computed net loss per share of common stock using the treasury stock method for the three and six months ended June 30, 2017, and using the two-class method required for participating securities for the three and six months ended June 30, 2016. The Company considered its redeemable convertible preferred stock to be participating securities as the holders of the preferred stock were entitled to receive a dividend in the event that a dividend was paid on common stock. Diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted average number of shares of common stock during the period plus the impact of dilutive securities, to the extent that they are not anti-dilutive. The following table presents the calculation of basic and diluted net loss per share for the Company’s common stock:


	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Numerator:
Net loss	$	(1,464)	$	(286)	$	(4,345)	$	(77)
Accretion of redeemable convertible preferred stock		—		(604)		—		(202)
Net loss attributable to common stockholders, basic and diluted	$	(1,464)	$	(890)	$	(4,345)	$	(279)
Denominator (basic and diluted):
Weighted average shares of common stock outstanding, basic and diluted		16,506,585		4,860,758		16,373,413		4,765,977
Net loss per share attributable to common stockholders, basic and diluted	$	(0.09)	$	(0.18)	$	(0.27)	$	(0.06)

The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:


	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Stock options to purchase common stock	2,957,302	2,724,783	2,957,302	2,724,783
Restricted stock	730,822	—	730,822	—
Common stock warrants	—	213,806	—	213,806
Preferred stock warrants (as converted to common stock)	—	463,589	—	463,589
Redeemable convertible preferred stock (as converted to common stock)	—	5,089,436	—	5,089,436
	3,688,124	8,491,614	3,688,124	8,491,614

On October 4, 2016, the Company closed its IPO in which the Company issued and sold 4,300,000 shares of common stock, plus the exercise of the underwriters’ option to purchase an additional 645,000 shares, at an issuance price of $12.00 per share. See Notes 1 and 13 for additional information.