Net loss per share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share

The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect (in thousands):

	Year ended December 31, 2019
	2019	2018	2017
Outstanding stock options	5,483	4,643	3,755
Restricted stock units	1,127	931	477
ESPP shares	19	10	9
	6,629	5,584	4,241