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

12 Months Ended

Dec. 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:

	Year Ended December 31,
	2019	2018	2017
Stock options to purchase Common Stock	7,548,436	7,507,690	6,514,538
Performance stock options	552,010	143,335	164,783
Restricted stock units	1,274,217	979,278	600,334
Performance stock units	11,925	153,503	304,754
Employee stock purchase plan	76,036	96,219	32,325
Common stock warrants	1,500	1,500	1,500