Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Anti-dilutive Effect Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders

The Company excluded the following potential common shares, presented based on amounts outstanding at December 31, 2018 and 2017, from the computation of diluted net loss per share attributable to common stockholders because including them would have had an anti-dilutive effect:

	As of December 31,
	2018		2017
Convertible preferred shares (as converted to common stock)		—		24,168,656
Unvested common stock from early exercise of options		151,289		265,098
Stock options to purchase common stock		3,203,122		1,971,711
Total		3,354,411		26,405,465