The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data):

	Year Ended December 31,
	2019			2018			2017
Numerator
Net loss	$	(276,213	)	$	(67,698	)	$	(57,010	)
Denominator
Weighted average shares outstanding		44,767,581			38,466,233			33,098,571
Less: weighted average shares subject to repurchase		(2,085	)		(79,327	)		(266,057	)
Weighted average shares used to compute basic and diluted net loss per share		44,765,496			38,386,906			32,832,514
Net loss per share, basic and diluted	$	(6.17	)	$	(1.76	)	$	(1.74	)

Basic net loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted average number of common shares and potentially dilutive securities for the period, determined using the treasury-stock method and the as-if converted method, for convertible securities, if inclusion of these is dilutive. Because the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods.

The following outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:

	As of December 31,
	2019		2018		2017
Common stock subject to repurchase		—		9,790		81,373
Options and awards issued and outstanding		5,315,254		3,864,407		2,964,549

As of December 31, 2019, the Company has contributions from plan participants of $0.4 million under the 2015 ESPP, which if converted, would be equivalent to 10,000 shares based on 85% of the stock price at the beginning of the offering period. As of December 31, 2018, the Company had contributions from plan participants of $0.3 million under the 2015 ESPP, which if converted, would be equivalent to 5,700 shares based on 85% of the stock price at the beginning of the offering period.