Net Loss per Share Attributable to Common Stockholders (Tables)

6 Months Ended

Jun. 30, 2019

Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders which excludes shares which are legally outstanding, but subject to repurchase by the Company (in thousands, except share and per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Numerator:
Net loss attributable to common stockholders	$	(11,385	)	$	(7,409	)	$	(19,369	)	$	(16,329	)
Denominator:
Weighted-average common shares outstanding		37,314,540			7,946,102			37,295,858			7,941,430
Less: weighted-average unvested restricted shares and shares subject to repurchase		(19,687	)		(189,021	)		(24,220	)		(220,463	)
Weighted-average common shares outstanding used in computing net loss per common share, basic and diluted		37,294,853			7,757,081			37,271,638			7,720,967
Net loss per share attributable to common stockholders, basic and diluted	$	(0.31	)	$	(0.96	)	$	(0.52	)	$	(2.11	)

Summary of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss per Share

The following potentially dilutive securities, presented on an as-converted to common stock basis, were excluded from the computation of diluted net loss per share attributable to common stockholders for the period presented because including them would have been antidilutive:

	As of June 30,
	2019		2018

Options to purchase common stock		5,468,167		3,383,478
Redeemable convertible preferred stock		—		12,385,154
2017 convertible notes ⁽¹⁾		—		2,497,722
2018 convertible notes ⁽²⁾		—		4,226,243
Redeemable convertible preferred stock warrants		—		500,000
Unvested restricted stock awards		16,320		165,898
Unvested early exercised common stock options		—		938
Total		5,484,487		23,159,433

(1)	Calculated as $10.0 million in principal and $2.5 million in accrued but unpaid interest as of June 30, 2018, convertible at $5.00 per share of common stock.

(2)	Calculated as $33.0 million in principal and $0.8 million in accrued but unpaid interest as of June 30, 2018, convertible at 80% of the $10.00 per share of common stock from the Company’s IPO.