9. Net Loss per Share

Basic and diluted net loss per share is summarized in the following table:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Numerator:
Net loss	$	(32,740)	$	(18,192)	$	(94,187)	$	(45,589)
Denominator:
Weighted average shares of common stock outstanding		30,982,192		28,834,808		30,938,026		27,180,244
Net loss per share, basic and diluted	$	(1.06)	$	(0.63)	$	(3.04)	$	(1.68)

The Company’s potentially dilutive securities, which included stock options and RSUs, have been excluded from the computation of diluted net loss per share since the effect would be to reduce the net loss per share. Therefore, the weighted average number of shares of common stock outstanding used to calculate both basic and diluted net loss per share is the same. The following table presents potential shares of common stock excluded from the calculation of diluted net loss per share for the three and nine months ended September 30, 2018 and 2017. All share amounts presented in the table below represent the total number outstanding as of September 30, 2018 and 2017.


	September 30,
	2018	2017
Options to purchase common stock	4,323,353	3,242,831
Restricted stock unit awards	541,628	294,331
Total potential shares of common stock	4,864,981	3,537,162