Net Loss per Share

6 Months Ended

Jun. 30, 2019

The following table summarizes the computation of basic and diluted net loss per share of our common stock for the three and six months ended June 30, 2019 and 2018:



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
	(in thousands, except share and per share data)
Numerator:
Net loss	$	(13,420	)	$	(14,333	)	$	(25,093	)	$	(30,694	)
Denominator:
Weighted-average common shares outstanding, basic and diluted	48,451,562			46,279,947			48,141,474			45,746,513
Net loss per share attributable to common stockholders, basic and diluted	$	(0.28	)	$	(0.31	)	$	(0.52	)	$	(0.67	)

The following potentially dilutive securities outstanding, prior to the use of the treasury stock method or if-converted method, have been excluded from the computation of diluted weighted-average shares outstanding for the respective periods below because they would have been anti-dilutive:



	Three and Six Months Ended June 30,
	2019	2018
Options to purchase common stock	3,137,554	4,054,256
Unvested restricted stock	—	115,168
Unvested restricted stock units	3,513,781	3,312,840
Shares to be issued under ESPP	46,331	61,966
Total	6,697,666	7,544,230

Additionally, the 5.5 million shares underlying the conversion option of the Notes are not considered in the calculation of diluted net loss per share as the effect would be anti-dilutive. The Notes are not convertible as of June 30, 2019. We expect to settle the principal amount of the Notes in cash and therefore use the treasury stock method for calculating any potential dilutive effect of the conversion spread on diluted net income per share, if applicable. The conversion spread will have a dilutive impact on diluted net income per share when the average market price of our common stock for a given period of time exceeds the initial conversion price of $41.59 per share for the Notes.