8.Net Loss per Share

Diluted net loss per share is the same as basic net loss per share for all periods presented because the effects of potentially dilutive items were anti-dilutive, given the Company’s net loss. The following securities have been excluded from the calculation of weighted-average shares of common stock outstanding because the effect is anti-dilutive for the three and nine months ended September 30, 2016 and 2015:

	Three and Nine Months Ended September 30,
	2016	2015
Stock options	4,943,556	5,577,214
Restricted stock units	1,411,878	1,235,274

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Numerator (in thousands):
Net loss	$	(6,758	)	$	(8,235	)	$	(18,475	)	$	(23,333	)

Denominator:
Weighted-average shares of common stock outstanding, basic and diluted	46,903,628			41,645,894			46,453,480			41,331,481

Net loss per share, basic and diluted	$	(0.14	)	$	(0.20	)	$	(0.40	)	$	(0.56	)