Net Loss per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2017

Net Loss per Share Attributable to Common Stockholders

Schedule of computation of the 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 (in thousands, except share and per share data):

	Year Ended December 31,
	2017		2016		2015
Numerator:
Net loss	$	(36,957)	$	(37,177)	$	(14,858)
Accretion of redeemable convertible preferred stock		—		(558)		(75)
Net loss attributable to common stockholders	$	(36,957)	$	(37,735)	$	(14,933)
Denominator:
Weighted-average shares used to compute net loss per common share, basic and diluted		17,694,505		6,501,796		251,717
Net loss per share attributable to common stockholders, basic and diluted	$	(2.09)	$	(5.80)	$	(59.32)

Schedule of potentially dilutive securities excluded from diluted net loss per share calculations

	Year Ended December 31,
	2017	2016	2015
Options to purchase common stock	2,438,151	2,393,829	833,178
ESPP shares	24,938	—	—
Redeemable convertible preferred stock on an as-converted basis	—	—	5,323,103
Warrants to purchase redeemable convertible preferred stock on an as-converted basis	—	—	275,861
Total	2,463,089	2,393,829	6,432,142