Earnings Per Share

9 Months Ended

Sep. 30, 2020

The computation of the Company’s basic and diluted net income (loss) per share is as follows (in thousands, except per share amounts):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator:
Net income (loss) attributable to common stockholders	$	37,447	$	28,990	$	(4,074)	$	13,835
Denominator:
Weighted average shares used to compute net income (loss) per share attributable to common stockholders, basic	125,003		117,652		121,813		115,790
Weighted average effect of potentially dilutive shares to purchase common stock	9,545		7,499		—		7,855
Weighted average shares used to compute net income (loss) per share attributable to common stockholders, diluted	134,548		125,151		121,813		123,645
Net income (loss) per share attributable to common stockholders
Basic	$	0.30	$	0.25	$	(0.03)	$	0.12
Diluted	$	0.28	$	0.23	$	(0.03)	$	0.11

The following shares were excluded from the computation of diluted net income (loss) per share as the impact of including those shares would be anti-dilutive (in thousands):


	Three Months Ended September 30,		Nine Months Ended September 30,
	2020	2019	2020	2019

Outstanding stock options	82	1,540	1,532	1,455
Unvested restricted stock units	196	343	1,348	725
Total	278	1,883	2,880	2,180

As a result of the Company's completion of the acquisition of Vivint Solar, the Company issued 69,472,495 shares on October 8, 2020 which are not reflected in its calculation of net income (loss) per share for the three and nine months ended September 30, 2020.