Net Loss per Share Attributable to Portola Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Loss

The following outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to Portola Common Stockholders for the periods presented because including them would have been antidilutive:

	As of March 31,
	2019		2018
Stock options to purchase common stock		8,331,332		7,293,733
Performance stock options		624,321		163,481
Common stock warrants		1,500		1,500
Restricted stock units		1,179,480		646,125
Performance stock units		108,127		393,225
Employee stock purchase plan		14,619		12,391