Net Loss per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of basic and diluted net income (loss) per share

The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders (in thousands, except per share amounts):

	Year Ended December 31,
	2018			2017			2016
Numerator:
Net loss	$	(185,829	)	$	(277,192	)	$	(102,777	)
Denominator:
Weighted-average shares of common stock—basic for Class A and Class B	244,603			232,032			220,405
Effect of dilutive securities	—			—			—
Weighted-average shares of common stock—diluted for Class A and Class B	244,603			232,032			220,405
Net loss per share attributable to common stockholders:
Basic	$	(0.76	)	$	(1.19	)	$	(0.47	)
Diluted	$	(0.76	)	$	(1.19	)	$	(0.47	)

Schedule of antidilutive securities excluded from earnings per share

The following potentially dilutive common shares on a weighted average basis were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive (in thousands):

	December 31,
	2018	2017	2016
Stock options to purchase common stock	11,647	17,469	34,454
RSUs	8,514	10,030	11,578
Warrants	230	216	—
Diluted common stock subject to vesting	—	84	—
Diluted impact of ESPP	159	162	—
Total	20,550	27,961	46,032