Net Income (Loss) Per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share of Common Stock

The following tables set forth the computation of basic and diluted net income (loss) per share of common stock (in thousands, except per share data):

	Three Months Ended September 30,		Nine Months Ended  September 30,
	2018		2018
	Class A		Class A(1)
BASIC:
Net income (loss) attributable to common stockholders – basic	$	10,200	$	14,898
Weighted-average common shares outstanding – basic		860,988		863,062
Net income (loss) per share attributable to common stockholders    – basic	$	0.01	$	0.02
DILUTED:
Net income (loss) attributable to common stockholders – basic	$	10,200	$	14,898
Weighted-average common shares outstanding – basic		860,988		863,062
Weighted-average effect of dilutive securities:
Stock options and employee stock purchase plan		11,871		11,051
ZSUs		13,434		15,098
Performance-based ZSUs		935		935
Weighted-average common shares outstanding – diluted		887,228		890,146
Net income (loss) per share attributable to common    stockholders – diluted	$	0.01	$	0.02

(1) The net income (loss) per share calculation for the nine months ended September 30, 2018 is presented as if the one-for-one class conversion occurred as of the beginning of the period.

	Three Months Ended September 30,							Nine Months Ended September 30,
	2017							2017
	Class		Class		Class			Class		Class		Class
	A		B		C			A		B		C
BASIC:
Net income (loss) attributable to common    stockholders – basic	$	16,240	$	1,423	$	428		$	12,223	$	1,155	$	324
Weighted-average common shares    outstanding – basic		778,614		68,246		20,517			774,917		73,273		20,517
Net income (loss) per share attributable to    common stockholders – basic	$	0.02	$	0.02	$	0.02		$	0.02	$	0.02	$	0.02
DILUTED:
Net income (loss) attributable to common    stockholders – basic	$	16,240	$	1,423	$	428		$	12,223	$	1,155	$	324
Reallocation of net income (loss) as a result of    conversion of Class C shares to Class A shares		428		—		—			324		—		—
Reallocation of net income (loss) as a result of    conversion of Class B shares to Class A shares		1,423		—		—			1,155		—		—
Reallocation of net income (loss) to Class B and    Class C shares		—		129		(13	)		—		95		(10	)
Net income (loss) attributable to common    stockholders – diluted	$	18,091	$	1,552	$	415		$	13,702	$	1,250	$	314
Weighted-average common shares    outstanding – basic		778,614		68,246		20,517			774,917		73,273		20,517
Conversion of Class C to Class A common    shares outstanding		20,517		—		—			20,517		—		—
Conversion of Class B to Class A common    shares outstanding		68,246		—		—			73,273		—		—
Weighted-average effect of dilutive securities:
Stock options and employee stock purchase    plan		10,125		8,438		—			9,366		8,373		—
ZSUs		15,284		—		—			16,236		—		—
Performance-based ZSUs		898		—		—			898		—		—
Weighted-average common shares    outstanding – diluted		893,684		76,684		20,517			895,207		81,646		20,517
Net income (loss) per share attributable to    common stockholders – diluted	$	0.02	$	0.02	$	0.02		$	0.02	$	0.02	$	0.02

Shares excluded from Computation of Diluted Net Income (Loss) per Share

The following weighted-average equity awards were excluded from the computation of diluted net income (loss) per share because their effect would have been anti-dilutive for the periods presented (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Stock options and employee stock    purchase plan		7,792		11,859		5,702		17,440
Restricted shares		—		—		—		467
ZSUs		1,164		88		6,066		4,330
Total		8,956		11,947		11,768		22,237