Subsequent Events

12 Months Ended

Dec. 31, 2014

Subsequent Events [Abstract]

Subsequent Events

17. Subsequent Events

In January 2015, the Compensation Committee of the Board approved for Portola’s named executive officers performance stock unit (PSU) awards. Each PSU represents a contingent right to receive one share of the Company’s Common Stock. At any time over the four years following the date of grant, half of the shares subject to each PSU will be earned when the average closing price of Portola’s stock on the NASDAQ Global Select Market is above $50.00 per share for 45 consecutive trading days, and an additional half of the shares will be earned when the average closing price of Portola’s stock is above $60 per share for 45 consecutive trading days during such four year period.  Any shares earned will then vest on the one year anniversary of the date such shares were earned, subject to continuous service as of each such date.